口腔内就位道观测仪指导口腔医学生固定义齿牙备的实验研究  

An experimental study on guiding the preparation of fixed bridge for dental students by the surveying device for recording the path of insertion

作　　者：崔荣新 李伟 栾世龙 王林 孙鹏飞 韩冰 Cui Rongxin;Li Wei;Luan Shilong;Wang Lin;Sun Pengfei;Han Bing(Department of prosthodontics,Dezhou Municipal Hospital,Dezhou 253012;School of Medicine and Nursing,DezhouUniversity,Dezhou 253023)

机构地区：[1]德州市立医院口腔科,德州253012 [2]德州学院医药与护理学院,德州253023

出　　处：《口腔材料器械杂志》2022年第4期282-286,共5页Chinese Journal of Dental Materials and Devices

基　　金：2017年度山东省医药卫生科技发展计划(编号:2017WSA14018)。

摘　　要：目的研究口腔内就位道观测仪在口腔医学生固定义齿就位道确定中的作用。方法选取80名经过系统牙体制备理论教育的医学生,随机分为四组(A1组:采用就位道观测仪指导制备前牙;A2组:采用常规目测法制备前牙;B1组:采用就位道观测仪指导制备后牙;B2组:采用常规目测法制备后牙),每组各20名,分别在仿真头颅模型系统上模拟21、36缺失进行固定桥基牙制备。制备后用3D扫描仪行口内模型扫描,将获取数据导入CAD软件进行倒凹及会聚度的分析和测量。凡预备体无倒凹者为合格,存在倒凹者为不合格。采用统计学软件进行合格率及基牙平均会聚度的分析。结果A1组合格16人(合格率为80%);A2组合格9人(合格率为45%);B1组合格15人(合格率为75%);B2组合格5人(合格率40%)。数据分析表明,A1组优于A2组,两者存在差异性(P<0.05),B1组优于B2组,两者存在高度差异性(P<0.01)。桥基牙会聚度A1组优于A2组,B1组优于B2组,均存在高度差异性(P<0.001)。结论使用口内就位道观测仪可以提高医学生固定义齿共同就位道的成功率。Objective The aim of study was to investigate the effect of the surveying device for recording common path of insertion on guiding the tooth preparation of fixed bridge abutment for dental students.Methods Eighty dental students who have received systematic dental preparation theory education were randomly divided into four groups(group A1:anterior tooth preparation by surveying device;group A2:anterior tooth preparation by visual method;group B1:posterior tooth preparation by surveying device;group B2:posterior tooth preparation by visual method),with 20 in each group.Fixed bridge abutments by simulating 21 and 36 deletions on the simulated head model system were prepared.After preparation,the 3D scanner is used to scan the oral model,and the acquired data is imported into CAD software for analysis and measurement of undercut and convergence.The preparation without undercut is qualified,and the preparation with undercut is unqualified.The models were scanned with intraoral scanners by one person and the Data were acquired and analyzed using 3-dimensional analysis software by the other person.The preparations were qualified with no undercut and unqualified with undercut.The success rate of the path of insertion and the average convergence angles were analyzed.Results There were 16 qualified and 4 unqualified persons in Group A1(qualification rate is 80%);There are 9 persons in A2 combination grid,and 11 persons are unqualified(the qualification rate is 45%);15 persons in Group B1 were qualified and 5 persons were unqualified(the qualification rate was 75%);There are 5 persons in B2 combination grid,and 15 persons are unqualified(the qualification rate is 40%).Data analysis showed that A1 group was superior to A2 group,with differences(P<0.05),while B1 group was superior to B2 group,with high differences(P<0.01).The convergence degree of abutment teeth in A1 group was superior to that in A2 group,with a high difference(P<0.001),while that in B1 group was superior to that in B2 group,with a high difference(P<0.001)

关 键 词：共同就位道 固定义齿 桥基牙 倒凹 会聚度 

分 类 号：R-4[医药卫生] G642.423[文化科学—高等教育学]