摘要
目的:对比徒手预备法和硅橡胶印模辅助法行金属烤瓷全冠牙体预备准确性的差异。方法:将40颗离体牙随机分为A、B两组,由20名医学生分别采用徒手预备及硅橡胶印模辅助的方法行牙体预备,用备牙前的硅橡胶印模在预备后的基牙上制备自凝塑料冠,通过测量塑料冠厚度得出两种方法的备牙量。结果:徒手预备及硅橡胶印模辅助两种方法的牙体各面平均预备量分别为切端2.15±0.54mm、2.46±0.41mm,(P<0.05);唇侧1.23±0.26mm、1.62±0.45mm,(P<0.05);舌侧0.72±0.23mm、0.87±0.27mm,(P>0.05)。结论:徒手行牙体预备时易导致唇、舌侧预备量不足及切端预备过量。使用硅橡胶印模作辅助工具可比徒手预备提高牙体预备量的准确性。
Objective:To compare the on accuracy of tooth preparation between 2 different tooth preparation techniques by dental students for metal ceramic crowns.Methods: Fourty maxillllary central incisor teeth were randomly allocated into 2 groups(A and B). 20 dental students were asked to prepare these teeth for metal ceramic crowns. A freehand approach was applied to prepare the teeth in group A as control group. Group B was prepared with the assistance of a silicone impres-sion, in which self-curing resin Was fil...
出处
《口腔颌面修复学杂志》
2010年第1期40-42,共3页
Chinese Journal of Prosthodontics
关键词
牙体预备
硅橡胶印模
准确性
tooth preparation
silicone impression
accuracy
