华西口腔医学杂志2025，Vol.43Issue(3)：370-375,6.DOI:10.7518/hxkq.2025.2024320
定深法磨牙(牙合)面预备空间不足的易发区域分析
Analysis of situations prone to insufficient spaces in tooth surface preparation with the fixed-depth groove method
摘要
Abstract
Objective Digitally collect data on the preparation space of the molar occlusal surface for full crown res-toration and analyze the minimum preparation spaces and areas prone to insufficient preparation.Methods A total of 846 molars(excluding third molars)designated for re-pair with zirconium dioxide crowns were selected.All molars were prepared by using the fixed-depth groove method under visual guidance.A digital impression was collected,and the occlusal surface of the preparation was divided into regions:mesiobuccal area,mesiolingual area,distobuccal area,distolingual area,mesial marginal ridge,and distal marginal ridge.Image measurement software(3 Shape Unite)was employed to record the smallest preparation space on the molar occlusal surface,and a space of＜1 mm was defined as insufficient preparation.The chi-square test was utilized for the statistical analysis of data.Results Significant differences were observed in the areas with the smallest preparation space on the occlusal surface of molars across different quadrants(P＜0.05).Notably,the area with the smallest preparation space on the occlusal surface of the maxillary first molar was most frequently found in the me-siobuccal area,whereas the smallest preparation spaces on other molars were predominantly located in the distolingual area.The insufficient preparation of the occlusal surface occurred in 41.0％(347 cases)of teeth.The distribution of prone areas corresponded with the distribution of the smallest spatial areas.Conclusion Although the fixed-depth groove method is employed,the preparation space on the molar surface unavoidably remains uneven under visual guidance.The identification of the areas prone to minimum preparation spaces can serve as a valuable guide for clinicians to prevent in-sufficient preparation.关键词
磨牙/全冠修复/(牙合)面预备/修复空间Key words
molar/full-crown restoration/occlusal surface preparation/preparation space分类
口腔医学引用本文复制引用
张跃骞,聂蓉蓉,孟翔峰..定深法磨牙(牙合)面预备空间不足的易发区域分析[J].华西口腔医学杂志,2025,43(3):370-375,6.基金项目
南京大学医学院附属口腔医院3456骨干人才资助项目(0222E301) "3456"Cultivation Program for Junior Talents of Nanjing Stomatological Hospital,Medical School of Nanjing University(0222E301) （0222E301）
