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ORIGINAL RESEARCH article

Front. Public Health, 05 June 2024
Sec. Life-Course Epidemiology and Social Inequalities in Health
This article is part of the Research Topic Promoting Health and Addressing Disparities Amongst Indigenous Populations View all 20 articles

A rural teledentistry care experience: a geriatric approach to assessing oral health status and treatment needs in older adults from a Mapuche community in Chile

Víctor Beltrn,
&#x;Víctor Beltrán1,2*Fernanda Muoz-Sepúlveda,,
&#x;Fernanda Muñoz-Sepúlveda1,2,3*Claudia Acevedo
Claudia Acevedo1*Pablo Navarro,Pablo Navarro4,5Bernardo VenegasBernardo Venegas6Catalina SalgadoCatalina Salgado7Pablo UribePablo Uribe7Wilfried EngelkeWilfried Engelke8
  • 1Clinical Investigation and Dental Innovation Center (CIDIC), Dental School and Center for Translational Medicine (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile
  • 2Interuniversity Center for Healthy Aging (CIES), Santiago, Chile
  • 3Program of Master in Dental Science, Dental School, Universidad de La Frontera, Temuco, Chile
  • 4Research Center for Dental Sciences (CICO), Dental School, Universidad de La Frontera, Temuco, Chile
  • 5Faculty of Health Sciences, Universidad Autónoma de Chile, Temuco, Chile
  • 6Stomatology Department, Faculty of Dentistry, Universidad de Talca, Talca, Chile
  • 7Dental School, Universidad de La Frontera, Temuco, Chile
  • 8Faculty of Medicine, Georg-August University of Göttingen, Göttingen, Germany

Background: Limited attention has been given to oral health challenges faced by older Indigenous populations, especially in rural settings, where disparities exist. This study aims to assess oral health in a rural Mapuche community in southern Chile, utilizing geriatric technology support, and exploring the connection between geriatric health and oral well-being to fill a gap in this context.

Methods: A cross-sectional study was conducted involving 76 independent older adults from a rural Mapuche community who required dental care. Assessments were in a remote care setting gathering extensive data including comprehensive geriatric assessments, medical and dental conditions using a geriatric teledentistry platform (TEGO®). Statistical analysis involved descriptive analysis, logistic regression, and both multiple correspondence analysis and k-means cluster analysis.

Results: The sample comprised individuals with limited formal education and a high degree of vulnerability. Geriatric assessments unveiled cognitive deterioration, frailty, depression risk, and multimorbidity. A distribution of the DMFT index, number of remaining teeth, number of occluding pairs, number of teeth with restorative needs and other relevant clinical findings was conducted based on sociodemographic, and medical-geriatric-dental characteristics, and additionally, a Multinomial Logistic Regression Analysis of Dentition Variables in Relation to Geriatric Assessments was performed. The dental burden was substantial, with an average DMFT index of 25.96 (SD 4.38), high prevalence of non-functional dentition (89.3%), periodontal disease (83%), xerostomia (63.2%) and oral mucosal lesions (31.5%). Age, lower education, depression, daily medication number and sugary consumption frequency were associated with a decreased average number of teeth (p < 0.05). Multiple correspondence analysis and k-means cluster analysis identified 4 clusters, with the edentulous and functional dentition groups being the most distinct.

Conclusion: This study uncovers a substantial dental burden and intricate medical-geriatric conditions interlinked among Indigenous older adults in a rural Chilean Mapuche community. The implementation of a geriatric technological ecosystem in the community enabled the resolution of less complex oral health issues and facilitated remote consultations with specialists, reducing the necessity for travel to health centers. This underscores the need for innovative dental public health initiatives to address health disparities and improve the overall well-being of older Indigenous adults.

1 Introduction

Numerous global references have focused on enhancing the oral health of older adults (15). However, limited attention has been directed toward the dual challenge faced by older Indigenous populations, stemming from restricted dental access and age-related concerns (6), which is further worsen by the disparities between Indigenous and non-Indigenous oral health outcomes (710). Moreover, in the present day, Indigenous communities are among the most disadvantaged globally (11, 12), facing an inequitable burden of health disparities, which differ across continents and are primarily linked to a mix of factors, such as socioeconomic disadvantages, communication barriers, transportation limitations, inadequate and inconsistent funding for community health services, limited access to culturally suitable healthcare, summed to unique social obstacles such as systemic racism, colonialism/neocolonialism, globalization, migration, transgenerational loss of language, land and culture, and even climate change (8, 1316). Given potential disparities in funding for oral and general healthcare, it is imperative to thoughtfully consider the potential greater challenge of addressing oral health inequalities compared to general health inequalities (17).

Furthermore, rural communities face challenges associated with aging, marked by the departure of working-age individuals to urban areas and the influx of retirees from cities, intensifying the demand for healthcare (18). Coupled with these demographic shifts, rural health settings grapple with significative administrative, quality control, and logistical hurdles, including a shortage of trained personnel and limited access to specialists (19). Globally, the utilization of health information and communication technologies (e-health) has proven instrumental in overcoming geographical barriers, emerging as a viable option for providing oral care services in rural and remote areas (20). These technologies have positively impacted general health condition management, contributing to enhanced healthcare access, improved quality of life, and increased social support within Indigenous populations (21, 22). Despite these benefits, Indigenous e-health research remains underexplored and underfunded, predominantly focusing on younger Indigenous populations in developed countries (2123).

Within the framework of human rights and sustainable development, initiatives have been undertaken to expedite endeavors aimed at enhancing Indigenous populations’ access to healthcare as a means of promoting well-being, justice, and human dignity (2426). Nonetheless, achieving this goal requires the development of scientific evidence regarding the epidemiological profiles of this population (24) and the formulation of community-tailored programs. Based on global experiences, it has been emphasized that strategies such as community health programs, student-led healthcare services, outreach initiatives, mobile clinics, and e-health could play a pivotal role in achieving this goal (27).

In that context, our group has made efforts in implementing an innovative teleodontology strategy for older adult residents of rural areas in Chile, with a special focus on the Mapuche community, which constitutes the most numerous Indigenous group in Chile, reaching around one million people in the central and southern regions of the country. 26% of the population in the La Araucanía Region, over 14 years old, identifies as such.

The absence of comprehensive epidemiological data among Latin American Indigenous groups represents a significant hurdle to advancing tailored oral health awareness and preventive initiatives (9). Moreover, a notable gap exists in initiatives addressing the distinctive requirements of older Indigenous individuals residing in rural settings, coupled with a scarcity of studies exploring the utilization of e-health, particularly e-oral healthcare, within this population, to the best of our knowledge. In this context, this study aims to assess the oral health status and treatment requirements of older adults within a rural Mapuche community in the La Araucania region of Chile, leveraging support from a geriatric technological ecosystem. Additionally, it seeks to explore the association between the sociomedical geriatric state and oral health, addressing an unaddressed area within the context of this Indigenous community.

2 Materials and methods

2.1 Ethical considerations

This cross-sectional study was developed as part of a Presidential Grant Project called Clinical Center for Innovation in Oral Health of the Older Adult in La Araucania region (Exempt Resolution No. 472). The main objective of this project is to implement interventions aimed at preventing and treating oral diseases, along with initiatives to enhance oral health knowledge, behaviors, and oral health self-efficacy. Ethical approval for conducting this project was granted by the Universidad de La Frontera Ethics Committee, decision 109/22. All the participants agreed to participate by signing an informed consent and their confidentiality was granted by anonymization of personal information prior to data treatment.

2.2 Participants and setting

In Chile, 12.8% of the population belongs to Indigenous communities, Mapuche people are the most prominent group, making up 32.82% of the population in the La Araucania region (28). The traditional Mapuche territory spans from the Bio-Bio River to Chiloe Island, encompassing diverse territorial identities that diverge from official state boundaries; each holds its distinct socio-cultural, spiritual rationale, and medical-religious framework (29, 30). The Makewe-Pelale sector belongs to the Wenteche territory and is in the La Araucania region, specifically in the municipalities of Padre las Casas and Freire. It consists of approximately 80 Mapuche communities with an estimated population of 10.000 people; the residents of this sector are mainly small-scale farmers, with an average of only 1.5 hectares per capital (29). This rural sector does not have access to fluoridated water.

The first approach to the Makewe-Pelale community was through a social anthropologist (A.H) with many years of collaborating with the community. Then, a meeting was made with the Werkén, spokesperson for various Mapuche organizations (31), and the Trapilhue leaders to explain the project, learn about their perspectives and perceived needs. The community through its council designated an intercultural facilitator of the community (E.Q) who spoke Mapuzugun (the language spoken by the Mapuche community), to be in charge of recruiting and enrolling the participants. Due to the scarce statistical records in this geographic area and the poor connectivity, the recruitment was through a convenience sampling, in which the intercultural facilitator went house to house to recruit participants. As in Beltrán et al. (32), inclusion criteria considered older adults (60 years and older) requiring an emergency, priority, or dental check-ups. Requirements to provide dental care in a remote setting were specified as follows: patients with chronic diseases must be under pharmacological treatment according to medical indications; patients must be capable of receiving verbal instructions and have sufficient mobility to sit in a portable dental chair. If they met the selection criteria and agreed through informed consent, they were scheduled to receive dental care in an Experimental Campus of Universidad de La Frontera located in this area.

Patients were enrolled face-to-face by the facilitator trained for it. Data considered for the patient’s registration included socio-demographic information such as their full name, national ID number, date of birth, contact phone, address, social register household (RSH) (33), ancestry, educational level, occupation, and social support. Barthel Index for Activities of Daily Living (34) was applied. All the data and instruments were loaded on a web platform named Geriatric Dental Specialties Tele platform (TEGO by its acronym in Spanish: “Tele Plataforma de Especialidades Geriátrico Odontológicas”) (32). This platform constitutes a technological ecosystem for geriatric clinical care, incorporating an electronic dental assessment record, 3D models, and facilitating teleconsultations with specialists.

The setting was a classroom prepared in workstations for the integral assessment and treatment of the older adults, four fully portable dental equipment and a portable dental x-ray equipment were used.

The inclusion criteria considered the older adult population (over 60 years old) with a dental emergency or requiring some kind of priority dental care. The requirements for providing dental care in a mobile clinic were specified as follows: sufficient mobility to access a dental chair in a mobile clinic; patients with chronic diseases must be under pharmacological treatment according to medical indications; patients must be capable of receiving verbal instructions and must complete a triage before the provision of dental care. The exclusion criteria apply to patients with vital emergencies (e.g., anaphylactic crisis) that must be immediately assessed by a physician and require urgent care.

2.3 Data collection

The examinations were conducted by two dental students completing their final year of internship, who were trained and supervised by two dentists with extensive clinical experience in the field (C.A and F.M-S). Before the examinations, the examiners were trained on the study protocol and diagnostic criteria using a PowerPoint presentation. Inter- and intra-examiner agreement (kappa values) was calculated. For the inter-examiner agreement, the students examined a total of 445 dental surfaces across six patients, while for the intra-examiner agreement, they re-examined 245 dental surfaces 1 week later. The results showed substantial inter-examiner agreement (κ value = 0.66) and substantial to almost perfect intra-examiner agreement (κ values of 0.78 and 0.85, respectively).

Clinical data were recorded following the criteria and recommendations from well-established methods (35, 36). The TEGO platform integrates three anamnesis modules for integral asses of older adults, allowing the evaluation of:

2.3.1 Medico-geriatric data

a. Cognitive state: The assessment was made through the Mini Mental state examination (MMSE) (37) or the Short Portable Mental Status Questionnaire (SPMSQ) (38), according to educational level. Cognitive deterioration was defined with <25 points in MMSE or > 3 points in SPMSQ.

b. Depression: The shortened Yesavage geriatric depression scale was evaluated (39).

c. Frailty: Fried frailty phenotype (40) was applied.

d. Nutritional status: Was calculated through Body Mass Index using the values for weight and height. A BMI ≥ 25 was considered overweight.

e. Multimorbidity: Multimorbidity has been defined as the presence of two or more comorbidities (41), and was obtained from participants’ reports.

f. Number of daily medications: Medication consumption was obtained from the participants reports. Polypharmacy was defined as the consumption of five or more medication (42).

g. History of falls in the past year, obtained from the participant report.

2.3.2 Dental-geriatric data

a. Lifestyle-related characteristics: A first interview was conducted for the assessment of habits such as brushing frequency, use of dental floss, cariogenic diet consumption and unhealthy habits. The questions surveyed were: How many times per day do you brush your teeth: never/once a day/twice a day/ three times a day/more than three times a day?; Do you use dental floss?: yes/ no; concerning the consumption of a cariogenic diet, the questions were as follows: Do you consume sugary foods and/or drinks (such as candies, cookies, cakes, sweet cakes, soda or sugary juices, coffee, tea, mate or milk with sugar) between meals: yes/no?. If the answer was yes, a question of the number of times in the day was added. Smoking habit was surveyed with the following question Do you smoke: yes/no?

b. Last visit to dental care, obtained from the participant report.

c. Swallowing disorders: The EAT-10 tool (43) was applied for the assessment of swallowing disorders. If the score was three or more, it was considered positive (44).

d. Xerostomia assessment: It was surveyed the question Do you feel your mouth dry: yes/no?

e. Dental Examination: Dental assessments were conducted employing dental mirrors and a periodontal probe, encompassing evaluations of teeth in both wet and air-dried states while considering both the coronal and root surfaces. Detailed explanations of the ICDAS-II scores for diverse levels of dental caries on all surfaces were previously provided (45). The computation of DMFT indices followed this approach: ICDAS scores 0 to 3 were considered as D = 0 (sound); scores 4 to 6 were interpreted as D = 1 (requiring restoration); missing teeth were designated as M = 1; and restored teeth without caries were attributed F = 1. Furthermore, the presence of non-carious tooth surface loss was also evaluated. The oral health status of the teeth was recorded in the platform’s odontogram section.

f. Periodontal assessment: was made with UNC-15 probe (Hu-Friedy, Chicago, Illinois, United States) performing a full-mouth recording on the SEPA periodontogram (46), which includes periodontal measurement at six sites per tooth. Gingival bleeding was evaluated after probing all teeth with an oral mirror. Periodontitis was defined when interdental CAL ≥ 2 non-adjacent teeth, or Buccal or Oral CAL ≥ 3 mm with PPD > 3 mm is detectable at ≥2 teeth (47); gingivitis was defined as ≥10% bleeding sites with probing depths ≤3 mm; and gingival health was defined as <10% bleeding sites, with probing depths ≤3 mm (48).

g. Missing teeth and number of occluded pairs: The number of natural teeth and tooth condition was assessed using the WHO criteria (35). The number of natural teeth was categorized into four groups: Total tooth loss (0 teeth), severe tooth loss (1–9 teeth), 10–20 teeth and functional dentition (21 or more teeth) (49, 50). The state of the teeth was uploaded in a novel 3D standardized model in TEGO (51). The analysis of the 3D model was used to ascertain the number of occluded pairs, where opposing pairs of maxillary and mandibular teeth were considered as a single occluded pair.

h. Oral mucosal lesions (OML): Following WHO guidelines (35), a comprehensive examination of oral mucosa and soft tissues, involving both visual inspection of the perioral area and a systematic assessment of the oral mucosa, was conducted. Detected OML were documented on the platform with traditional descriptions (size, color. Limits, symptomatology, type of surface, consistency, localization, and evolution), 3D digital representations (utilizing an extra and intraoral 3D phantom), and clinical images (52) (see Figure 1). Specialists received timely information through auto-generated emails and provided responses directly through the platform. The assessment aimed to identify the presence or absence of OML, offering an initial clinical diagnosis and classification, including denture related lesion, infectious conditions, oral potentially malignant disorder, tumors and tumor-like lesions, pigmentations, immune-mediated conditions, physical and chemical injuries, and vascular malformations (5356), while also noting the affected surfaces. Additionally, the oral pathology specialist provided treatment suggestions or follow-up recommendations.

i. Prosthetic Evaluation: The assessment of dental prostheses involved evaluating rehabilitation requirements, the use of prostheses, and examining the state of appliances employed by individuals. During the clinical examination, a thorough analysis was conducted, encompassing defects, stability, retention, and the overall integrity of the appliance, all based on established criteria (57, 58).

Figure 1
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Figure 1. Platform module interface, 3D standardized dental model, and 3D standardized intraoral and soft tissues examination. On the left side, the three-dimensional modeling depicts the most prevalent occlusion in the studied sample, using a standardized 3D phantom contained within the TEGO platform. On the right, there is the 3D phantom developed on the TEGO platform, which allows for generating a general representation of the intraoral soft tissues (mucous membranes and tongue), labeled in this case with a presumptive diagnosis of Fibroma; the interface enables remote evaluation and communication with an oral pathology specialist, through teleconsultation using the TEGO platform.

Figure 2 depicts the TEGO comprehensive care pathway tailored for assessing and treating oral health within older adults of a rural Mapuche community. This pathway encompasses a holistic approach integrating teledentistry alongside conventional methods to address the unique oral health needs of this demographic. From initial screening to treatment plan implementation, each step was meticulously designed to consider cultural sensitivities, ensure patient-centered care, and leverage teledentistry for enhanced accessibility and outreach.

Figure 2
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Figure 2. TEGO comprehensive care pathway. Operational flowchart of the attention and platform use workflow to support dental-medical care for older adults in a rural Mapuche community. Includes the Macroprocess description, the Units, and people involved in its development.

2.4 Statistical analysis

The descriptive analysis encompassed frequencies, means, standard deviations, and confidence intervals for the investigated parameters. Associations between outcomes and explanatory factors were investigated employing cross-tabulation alongside Pearson χ2 and Fisher’s exact tests. Additionally, a Multinomial logistic regression analysis was conducted to examine the relationship between tooth loss variables and the medico-geriatric state of the participants. Multiple correspondence analysis and K-means cluster analysis was performed to gain insights into population profiles in concerning the number of present teeth. The data collection was recorded in a Microsoft Office Excel spreadsheet, a descriptive analysis of the data was carried out for which the mean and its respective standard deviation and frequency distribution table were determined, the Kolgomorov-Smirnov normality test was carried out., Pearson’s Chi-Square test and Fisher’s Exact test, Kappa index as a measure of agreement, multivariate analysis through: Multinomial Logistic Regression, Multiple Correspondence Analysis and k-means Cluster Analysis. The SPSS statistical program (Statistics for Windows, version 23.0, IBM) was used to analyze the data.

Statistical significance was established at p-values <0.05. All statistical analyses were conducted employing SPSS software, version 23.

3 Results

At the conclusion of the survey, data were collected from a total of 76 participants. The participants had an average age of 70.55 years (SD 7.33), with 51.3% of them being women. Half of the older adults (51.4%) fell within the age range of 65 to 75 years. Most participants (78.9%) had 8 ears or less of formal education and were classified in the most vulnerable level of the RSH (98.4%). Almost half of the respondents considered themselves active by engaging in agriculture work (47.2%).

3.1 Geriatric assessment

In the mental and emotional evaluation, 20 participants (26.3%) had cognitive deterioration, and 32.9% were at risk of depression. The participants had a poor history of medical control, with 65.5% being overweight, 48.7% having uncontrolled blood pressure, and 18.4% having hyperglycemia. The average number of chronic diseases per participant was 1.58 (95% CI 1.27; 1.88), and 48.7% of them had multimorbidity. The daily consumption of medications varied from 0 to 10, with an average of 2.17 (95% CI 1.68; 2.66). As for functional status, almost all participants were entirely independent (93.4%). In terms of physical frailty, only one participant was classified as robust, while 51.3% exhibited frailty. Additionally, 39.5% of participants reported a history of falls in the past year.

3.2 Lifestyle characteristics

Regarding oral health behaviors, a considerable proportion (90.8%) of participants engaged in regular tooth brushing. The majority brushed their teeth two (37.8%) or three (32.4%) times a day and 26.2% flossed their tooth. The consumption of sugary items between meals was present in 28.9% of the participants, with an average of around two instances per day (mean 1.87; 95% CI 1.49; 2.23). Tobacco usage was observed in merely six individuals (7.9%). Additionally, 47.4% of participants had undergone a dental visit within the past year.

3.3 Dental caries experience

All the participants had a history of dental caries, as measured by the DMFT index, ranging from 13 to 32, with a mean of 25.96 (95% CI 24.88; 27.05) affected teeth. They had an average of 1.09 healthy teeth (95% CI 0.49; 1.69), 2.52 coronal caries (95% CI 1.89; 3.14), and 0.36 root caries (95% CI 0.16; 0.56) per teeth. Additionally, they had an average of 3.75 restorations (95% CI 2.74; 4.76) and six non-carious lesions (95% CI 5.12; 6.87).

3.4 Tooth loss

Concerning dentition status, the mean number of present teeth was 9.67 (95% CI 7.95; 11.39), 13 participants (17.1%) were fully edentulous, and only 10.7% of participants had functional dentition. Among those with partial dentition, the mean number of occluding pairs was 2.33 (95% CI 1.52; 3.15). The TEGO platform enabled the three-dimensional modeling of the most prevalent occlusal characteristics in the studied sample, with the most frequent findings being total maxillary edentulism and preservation of the lower anterior sextant (Figure 1).

3.5 Periodontal health

The prevalence of periodontal diseases was found to be substantial. Among the participants, 6.7% exhibited healthy periodontal conditions, whereas 10% presented with gingivitis. Notably, periodontitis was prevalent in 83.3% of participants.

3.6 Other oral manifestations

A total of 63.2% of participants self-reported experiencing symptoms of dry mouth, while nearly one in five (19.7%) reported having swallowing difficulties.

Both xerostomia and swallowing difficulty were found to exhibit significant correlations with each other (p < 0.05). Furthermore, they demonstrated correlations with multimorbidity (p < 0.05) and depression (p < 0.01). Additionally, swallowing disorders were also correlated with the number of medications consumed (p < 0.01).

30 oral mucosal lesions were found, which manifested in almost one-third of the participants (n = 24, 31.58%). Table 1 illustrates the distribution of all mucosal disorders observed in the sample. The most frequent anatomical location was Palate (33.3%), followed by Lower lip (26.7%). For 26.3% of the participants, a teleconsultation to oral medicine was conducted through the TEGO platform (Figure 1). The majority of cases were managed with conventional dental treatment, pharmacological management, or control and education. Biopsies were required for six cases.

Table 1
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Table 1. Prevalence of oral mucosal lesions.

3.7 Treatment needs

The average number of treatments performed was 3.79 [95% CI 3.57; 4.01]. Among the participants, 44.7% required fillings, with a mean of 2.14 [95% CI 1.52; 2.77] restorative treatments per tooth. This need for restorative treatment increased among the 75 years and older age group, as shown in Table 2. Extraction was indicated in 11.9% of participants. Almost all participants received preventive and promotional treatments, including oral health promotion (97.4%), scaling and dental prophylaxis (76.3%), and approximately one in five (19.7%) underwent fluoride varnish treatment.

Table 2
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Table 2. Distribution of DMFT index, number of remaining teeth, number of occluding pairs, and number of teeth with restorative needs based on sociodemographic and medical-geriatric-dental characteristics.

Prosthetics were used by 76.3% of the participants, with 26.8% of individuals seeking consultations for issues related to prosthetics. Most dentures exhibited inadequacies, primarily attributed to cracks, fractures, or poor fit, needing repairs or replacements in a substantial proportion of the participants (85.5%). Relining and repair of the prosthetics were undertaken for 45% of the participants.

The need for dental prosthetics was significantly associated with overweight (p < 0.05) and sugar intake between meals (p < 0.05). The number of teeth requiring restoration showed a significant relationship with hyperglycemia (p < 0.05). Extractions were significantly correlated with multimorbidity (p < 0.01).

3.8 Sociomedical geriatric state and tooth loss

A multinomial logistic regression analysis was conducted to explore the relationship between geriatric health variables, categorized into four dimensions (social, functional, medical, and dental), and tooth loss-related variables, specifically the number of remaining teeth and the number of occluding pairs. The statistically significant models identified allow for predictions to be made about the studied variables by considering their geriatric characteristics. As illustrated in Table 3, the analysis of social factors reveals that individuals aged 65 and older with lower educational attainment (8 years or less) tend to exhibit a reduction in the number of teeth, with an estimated average decrease of 9.07 teeth. In the mental health assessment, the presence of depression and cognitive decline are associated with a decrease in the average number of remaining teeth and occluding pairs, respectively. Furthermore, a notable disparity emerges in the number of teeth among individuals who consume substantial amounts of sugars between meals, with an estimated difference of approximately 17 teeth.

Table 3
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Table 3. Multinomial logistic regression analysis of dentition variables in relation to geriatric assessments.

A final multinomial regression analysis was conducted, incorporating variables that had been identified as statistically significant within each dimension. This culminated in the development of a conclusive model, capable of predicting the key variables pertaining to comprehensive geriatric assessment that warrant evaluation to ascertain the count of remaining teeth. These variables included age categorization, education level, frailty, cognitive decline, depression, the number of daily medications, and the frequency of sugar intake between meals ( Υ = 16.00 + 0.96 AgeCategorization 3.71 Education 1.32 Frailty 0.59 CognitiveDecline 3.14 Depression 0.65 Medications 0.85 FrequencySugarIntake ; p = 0.013 ) . Additionally, age categorization, uncontrolled blood pressure, and the frequency of sugar intake between meals emerged as pertinent factors for determining the number of occluding pairs ( Υ = 2.66 + 2.09 Age Categorization 1.19 Uncontrolled Blood Pressure 0.49 Frequency Sugar Intake ; p = 0.013 ) .

In the multiple correspondence analysis (MCA), a two-dimensional model was obtained. Dimension 1 explains most of the model and includes variables such as remaining teeth, depression, cognitive decline, number of medications, frailty, age, and education level. Dimension 2 is composed of frequency of sugar intake and uncontrolled blood pressure. Figure 3A depicts clear and distinct patterns of association among variable categories in the MCA, revealing the formation of four clusters based on the number of remaining teeth. These clusters where further analyzed through k-means cluster analysis, identifying some common characteristics shared among the groups. However, two distinct groups stand out: the edentulous group (0 teeth) and the functional dentition group (21 and more teeth). The edentulous group comprises individuals with older age (65 and above), cognitive decline, depression, frailty, and polypharmacy. These characteristics, except for polypharmacy and cognitive decline, are also observed in the second group of patients with severe tooth loss (1–9 remaining teeth). Additionally, in alignment with the Multinomial logistic regression analysis, a noticeable association becomes evident in the fourth group, linking higher educational attainment, the absence of frailty, cognitive decline, depression and uncontrolled blood pressure, lower medication, and lower sugar consumption between meals, with the presence of functional dentition (Figures 3A,B).

Figure 3
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Figure 3. Profiles of remaining teeth using multiple correspondence analysis and k-means cluster analysis, grouped by geriatric assessment characteristics. (A) MCA dimensions discrimination measures grouped in clusters by the number of remaining teeth (0, 1–9, 10–20, and 21–32) by k- mean cluster analysis. (B) Positive and negative centroid coordinates for dimension 1.

4 Discussion

This study stands as one of the limited inquiries investigating the oral health condition, treatment requirements, and their interrelation with the socio-medical conditions of older Indigenous individuals in Chile. These objectives are distinctive because they concentrate on an often-overlooked group of older Indigenous individuals who should be assessed independently, rather than being grouped with other cohorts. This distinction is vital because the oral health status and disparities among Indigenous communities often go unnoticed in broader population metrics due to factors such as inadequate representation or constraints stemming from survey methodologies (59). Our findings reveal a significant oral health burden, marked by elevated rates of dental caries, periodontitis, dry mouth, and tooth loss. In addition, there is a substantial load of chronic diseases, encompassing cognitive deterioration, an increased risk of depression, the presence of multiple chronic conditions, and a prevalent state of frailty. This investigation sheds light on the significant disparities in both oral and overall health among Indigenous older adults, influenced by factors such as age, education, and lifestyle.

In examining caries experience, our findings reveal a substantial DMFT index of 26.47 within the 65 to 74 age group, indicating a noteworthy prevalence of dental caries in this demographic. While this index is lower than that reported in a Mapuche-Huilliche community in Chile (28.2) (60) and South American Indigenous groups (28.19) (9), it remains higher than figures from national studies (21.57–25.68) (57, 6163), a trend that has been consistently observed in previous research (8, 9). Unlike many studies that focus primarily on investigating caries experience, this research provides a broader perspective by delving into the comprehensive oral health status of this community, revealing that health inequalities extend beyond caries to encompass tooth loss, periodontal disease, and xerostomia. Notably, when comparing the functional dentition of the 65–74 age group (5.3%) with figures from national surveys (30.2%) (64), a substantial disparity becomes evident. Likewise, significant discrepancies are observed in the prevalence of periodontitis when compared to Chilean non-Indigenous populations (43.3% vs. 28.8%) (65). While the challenges of periodontal epidemiological comparisons due to divergent case definitions are acknowledged, our study’s outcomes align with those reported in a recent systematic review (7).

Consistent with these findings, the prevalence of dry mouth perception was notably higher (63.2%) than that reported in independent older populations (ranging from 13 to 40%) (66, 67). As for the prevalence of oral mucosal lesions, it is lower than previously reported in cross-sectional national studies (ranging from 34.2 to 53%) (54, 68, 69). Nevertheless, the most prevalent lesion in the participants is consistent with prior findings, as denture stomatitis emerges as the most common condition (54, 69, 70). It is noteworthy that oral potentially malignant disorders comprised 16.67% of all the OML, with a prevalence in our sample of 6.58%, which is higher than the reported in Chilean non-Indigenous populations (1.13–4.7%) (32, 54, 68, 70), and worldwide (4.47%) (71). One possible theory for this could be a greater accumulation of risk factors, such as increased sun exposure due to agricultural activities, local traumatic factors like ill-fitted prosthetics, poor oral health, and dietary elements like maté drinking (72, 73), underscoring the importance of oral health promotion for the prevention of risk factors and oral self-examination in this population. In the context of oral potentially malignant disorders, age could be added as a risk factor, considering that this study focused on older adults (60 years and older), and, according to literature, Leucoplakias, as one of the main potentially malignant disorder are found in patients over 45 years old (74). In the same context, age also could predict probable malignization, considering that epithelial dysplasia is more frequently found in individuals over 41 years old (75). Predictive instruments like nomograms have been developed with the aim of predict malignant transformation of Leucoplakias, concluding that this transformation occurs mainly in patients over 50 years old (76). However, it is essential to approach these results with caution as they were based on clinical diagnosis, and histopathological confirmation is required. To the best of our knowledge, there is no existing evidence on the prevalence of swallowing disorders in Indigenous populations, as they are not routinely identified. The prevalence found in this study is in line with previous global studies, affecting approximately one in every five older individuals (77). Correlations were found with medication consumption, dry mouth, depression and multimorbidity. As the relationship between this geriatric syndrome and oral health conditions remains relatively unexplored (78), it is advisable for future studies to not only include screening but also to broaden their scope, considering its significant impact on health and quality of life. This expansion could encompass clinical evaluations, such as assessing temporomandibular joint disorders (79) and evaluating intra-oral compartment pressures (80).

The current study has identified a robust connection between the number of remaining teeth and several key factors, including age, education, mental and physical health, medication usage, and meal frequency. Individuals with fewer teeth tended to be older, have lower levels of education, experience more mental and physical health issues, consume a greater number of daily medications, and have a higher meal frequency. This observation is consistent with previous research findings in this age group (8184).

Additionally, it has been reported that as certain Indigenous communities transition from traditional to more contemporary lifestyles, there is a concerning and rapid increase in lifestyle-related illnesses, such as obesity, cardiovascular diseases, and type 2 diabetes (85). Some of the issues highlighted by these findings underscore the importance of health promotion. This is because the primary drivers of complex noncommunicable diseases (NCDs), such as caries, periodontitis, oral cancer, diabetes, hypertension, and others, include an unhealthy diet, reduced physical activity, and tobacco usage (86, 87). Through our investigation, we have uncovered a compelling correlation between treatment requirements and both nutritional status and chronic conditions associated with dietary patterns. One plausible explanation for this phenomenon is the direct impact of the number of remaining teeth on dietary intake quality (88). For instance, a population requiring significant prosthodontic treatment due to tooth loss may have a reduced ability to chew and process certain foods, leading to dietary choices that rely on easily consumable carbohydrates and excessive sugar intake.

The use of technology to deliver care to remote settings has been successful in addressing accessibility barriers for Indigenous older adults (8991). In this case, the integrated technological ecosystem in TEGO enabled teleconsultation and the provision of specialist guidance to patients. Additionally, it helped reduce the burden on the healthcare system by addressing a large number of low to moderate complexity treatment needs, while also decreasing the need for secondary care consultations, as only those who truly required specialist evaluation had to physically attend a healthcare facility. The integration of electronic records, as exemplified by the TEGO platform, played a pivotal role in enhancing the quality of care provided. This technology, empowered students to perform comprehensive assessments of rural older adults, guiding them in tailoring treatments based on the medical-geriatric status of the patients they evaluated. This community-based intervention also exposed them to the realities of rural practice and service conditions, preparing them to deal with situations they may not have encountered during their training, with remote support from dental specialist to address more complex queries. This approach aligns undergraduate curricula with the health needs of rural communities (92). Furthermore, our study draws parallels with the positive outcomes observed in rural Australia, where a collaborative endeavor between universities and the local community established a student-led clinic service improving access to timely and less invasive care for Indigenous populations (93). These outcomes underscore the potential for technology-driven solutions to bridge healthcare gaps and optimize the delivery of care to underserved communities, including Indigenous older adults in our study.

Considering that oral health disparities persist as a public health concern not only in Chile but also in various regions globally (9496), this study underscores the necessity for a comprehensive analysis of factors contributing to health inequalities in the studied population. These factors include the historical socioeconomic determinants that have consistently shaped the life trajectories of this specific cohort (97), alongside with the rapid adoption of detrimental lifestyle habits. The study’s identification of a high burden of oral disease, significant unmet oral healthcare needs, particularly in terms of restorative and prosthetic treatment; and the undeniable connection between oral health and overall well-being, highlights the importance of implementing a comprehensive and interdisciplinary healthcare approach, especially when working with Indigenous populations. This approach aligns with the Mapuche perspective on health, seamlessly integrating socio-spiritual and psycho-biological elements into their worldview and environmental interactions (13). However, integrating traditional health concepts faces challenges due to the prevailing specialization in the current healthcare system, which often hinders collaboration and regrettably overlooks the crucial principle of interdependence (98). To effectively address the substantial oral health challenges faced by Indigenous older populations dental public health programs must prioritize culturally appropriate strategies and embrace innovative, community-centered approaches (8).

While considering these observations, it is essential to recognize the constraints inherent in this study. Issues such as the scarcity of information regarding the entire population within this community, the wide dispersion of the population over a large geographical area, challenges in communication, and difficulties in transportation, led to the adoption of convenience sampling method. It has been acknowledged that studies of this kind often encounter challenges in engaging with Indigenous communities (99). Nevertheless, the involvement of an intercultural facilitator and the support from the local council facilitated the engagement of older adults’ community members, especially those who exhibited hesitance in seeking medical and dental care. This approach also enabled the expression of specific concepts in Mapuzugun. The significance of community involvement and consideration of Indigenous perspectives has been previously emphasized (100, 101), and in this case, the program was approved by community leaders but designed and executed without active community participation, highlighting an area of priority for building trust and partnership in future initiatives. It is worth noting that the older individuals who participated were those with the means to travel to the remote care setting, potentially introducing a participation bias. Moreover, this subgroup might display varying levels of disease compared to more susceptible segments, like dependent older adults. Consequently, while this dataset provides valuable insights, it primarily offers preliminary information and should not be construed as indicative of the broader Mapuche older adult population. This is because the distinct cultural and social characteristics of Indigenous peoples hinder the generalizability to other communities. Additionally, this study is constrained by inherent limitations stemming from its cross-sectional design, impeding the establishment of causal relationships, and rendering it incapable of assessing the effectiveness of the employed program. This underscores the necessity for continued investigation in subsequent research efforts and partnership with local communities.

The study introduces an innovative approach to oral healthcare for Indigenous rural older adults, integrating a technological ecosystem and human capital development. This approach provides essential information to update epidemiological profiles of the Mapuche population. The intricate interplay among the presented variables presents a compelling opportunity for national and international healthcare policies to prioritize this group. Efforts should be directed at implementing a comprehensive and integrated horizontal approach of healthcare strategies, supported by technology, aimed at promoting oral health and endorsing the dignified aging of this population. While we believe that existing programs can benefit from the use of technology and home/community-based care, it is crucial to acknowledge the challenges related to technical capacity, structural limitations, and organizational support for an e-health venture in a rural setting, such as internet connectivity, relocation of healthcare personnel and equipment transport, among other factors. For the implementation of these strategies, it is necessary to encompass suitable and culturally competent interventions for oral health education and promotion, preventive, and treatment measures, as well as effective and sustainable financial resource and organizational planning characterized by a long-term view with the aim of preserving both the remaining dentition and supporting structures. These pilot initiatives hold significant potential for improving the oral health of Indigenous populations and, ultimately, for addressing disparities in oral healthcare. Furthermore, there is an urgent need for forthcoming studies to compile regional, national, and international statistics related to Indigenous oral health. Additionally, longitudinal studies are imperative for evaluating the long-term impact of these programs on changes in Indigenous oral health.

5 Conclusion

In conclusion, this study provides valuable insights into the oral health and general well-being of older Indigenous adults residing in a rural Mapuche community in Chile. The findings reveal a high burden of oral disease, including high rates of dental caries, periodontal disease, xerostomia, oral mucosal lesions, and tooth loss. Additionally, participants exhibited complex medical-geriatric conditions such as frailty, cognitive decline, depression, polypharmacy, and multiple chronic diseases, all of which were interrelated with tooth loss variables. The implementation of a geriatric technological ecosystem in the community facilitated the resolution of low to moderate complexity pathologies and enabled remote consultations, thereby reducing the necessity for travel to health centers. To address these significant oral health disparities among Indigenous populations, dental public health initiatives could incorporate innovative approaches like teledentistry, as demonstrated in this study. These programs should prioritize oral health education, prevention, and treatment, while fostering partnerships with the communities and considering the unique needs and perspectives of Indigenous populations. The ultimate goal is to promote dignified aging and enhance the overall health and well-being of these communities.

The research group has conducted previous studies regarding patients’ acceptance of this tool. In this sense, the results showed high levels of patient satisfaction after receiving priority or urgent dental care, which reached above 75% in all dimensions of the questionnaire (Access to dental care, user treatment, platform, recommendation) (102).

Although economic costs may vary due to the types of specialty coverage, material costs, and the use of specialized dental equipment, considering the estimated fees for a specialist dentist, the system allows for the optimization of the specialist’s time, enabling them to accommodate their schedule asynchronously within a timeframe that suits them. In this current project, we foresee the participation of a team of specialists in different areas of dentistry, with at least half a day of dedication each week. Within the context of the platform, the service of computer support is required, which in this case is supported by 2 professionals from the Institute of Educational Informatics of our university, plus the server costs to ensure a continuous service without interruption. However, in relation to the need for a stable internet network and the challenging geography of the territory in Chile, it becomes necessary to connect the use of these technologies in the future through satellite internet, in order to create a technological ecosystem that allows for comprehensive coverage of rural territories, which are the ones that unjustly have the least coverage of specialized health services. We believe that the combination of new technologies, like the ones we have fostered with the development of this technological platform, can be applied as teleodontological strategies to enhance coverage for older adults residing in remote geographical areas, respecting their cultural visions, such as the fair access to specialized dental health care in their own territory, also facilitating their travel to major urban centers and improving the interaction between dentists working directly in the communities.

Data availability statement

The original contributions presented in the study are included in the article/supplementary material, further inquiries can be directed to VB, dmljdG9yLmJlbHRyYW5AdWZyb250ZXJhLmNs.

Ethics statement

The studies involving humans were approved by Universidad de La Frontera Ethics Committee. The studies were conducted in accordance with the local legislation and institutional requirements. Written informed consent for participation in this study was provided by the participants or their legal guardians/next of kin.

Author contributions

VB: Conceptualization, Funding acquisition, Project administration, Supervision, Writing – review & editing, Investigation, Methodology. FM-S: Conceptualization, Data curation, Investigation, Methodology, Writing – original draft, Writing – review & editing, Visualization. CA: Investigation, Project administration, Writing – review & editing, Data curation, Funding acquisition, Supervision. PN: Formal analysis, Writing – review & editing, Methodology. BV: Writing – review & editing, Investigation, Supervision, Visualization. CS: Investigation, Data curation, Writing – review & editing. PU: Investigation, Data curation, Writing – review & editing. WE: Writing – review & editing, Investigation, Supervision.

Funding

The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This research was funded by the Presidential Grant Project Clinical Centre for Innovation in Oral Health of the Older Adults in La Araucanía region (Exempt Resolution No. 472).

Acknowledgments

The authors extend their sincere gratitude to the Universidad de La Frontera, especially to the Campus Experimental Maquehue of the Faculty of Agricultural and environmental Sciences, and to the Faculty of Dentistry, for providing invaluable logistical support to this project. Additionally, the authors would like to express their profound appreciation to the Interuniversity Centre for Healthy Aging (Code RED211993) of the Council of Rectors of Chilean Universities (CRUCH) for their generous collaboration. FM-S would like to acknowledge the partial support received from the Programa Nacional de Becas de Postgrado CONICYT (Magíster Nacional/2022-22220928). We would like to offer special thanks to the following collaborators for their invaluable contribution to this study: Alejandro Herrera (Social Anthropologist), Eva Quinchanao (Intercultural Facilitator), María Inés Carileo (Dental Assistant), and the dedicated cooperation extended by the students of the School of Dentistry at Universidad de La Frontera. Gratitude is also extended to the leaders and members of Makewe-Pelale Mapuche community, as well as to the participants who took part in the study.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Abbreviations

TEGO, Geriatric Dental Specialties Tele platform; OML, Oral Mucosal Lesion

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Keywords: oral health, indigenous, oral disease burdens, teledentistry, aging, inequalities, geriatric assessment, older adults

Citation: Beltrán V, Muñoz-Sepúlveda F, Acevedo C, Navarro P, Venegas B, Salgado C, Uribe P and Engelke W (2024) A rural teledentistry care experience: a geriatric approach to assessing oral health status and treatment needs in older adults from a Mapuche community in Chile. Front. Public Health. 12:1356622. doi: 10.3389/fpubh.2024.1356622

Received: 20 December 2023; Accepted: 08 May 2024;
Published: 05 June 2024.

Edited by:

Esteban Ortiz-Prado, University of the Americas, Ecuador

Reviewed by:

Ashek Elahi Noor, University of Dhaka, Bangladesh
Eduardo Vasconez, University of the Americas, Ecuador

Copyright © 2024 Beltrán, Muñoz-Sepúlveda, Acevedo, Navarro, Venegas, Salgado, Uribe and Engelke. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Claudia Acevedo, Y2xhdWRpYS5hY2V2ZWRvQHVmcm9udGVyYS5jbA==; Fernanda Muñoz-Sepúlveda, ZmVybmFuZGEubXVub3pAdWZyb250ZXJhLmNs; Víctor Beltrán, dmljdG9yLmJlbHRyYW5AdWZyb250ZXJhLmNs

These authors have contributed equally to this work and share first authorship

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