AUTHOR=Wang Junhui , Zhang Baize , Chen Yujiang , Wang Lulu , Du Yang , Ge Xin , Liu Fen , Gong Jing , Wang Xiaojing TITLE=Questionnaire survey on the clinical application of Hall technique preformed metal crowns in caries of primary molars in China JOURNAL=Frontiers in Oral Health VOLUME=5 YEAR=2025 URL=https://www.frontiersin.org/journals/oral-health/articles/10.3389/froh.2024.1513840 DOI=10.3389/froh.2024.1513840 ISSN=2673-4842