电动牙科手机与涡轮气动牙科手机在贴面预备后的对比研究  

Comparative Study of Tooth Preparation for Veneer by Electric Handpiece and Air-turbine Handpiece

作　　者：骆碧珠 陈映铭 尹路 徐秋生 杨常委 梁悦 LUO Bizhu;CHEN Yingming;YIN Lu;XU Qiusheng;YANG Changwei;LIANG Yue(Stomatological Hospital of Xiamen Medical College,Xiamen 361008,China;Stomatological Hospital of Xiamen Medical College,Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment,Xiamen 361008,China;Department of Stomatology,Xiamen Medical College,Xiamen 361023,China)

机构地区：[1]厦门医学院附属口腔医院,福建厦门361008 [2]厦门市口腔疾病诊疗重点实验室,福建厦门361008 [3]厦门医学院,口腔医学系,福建厦门361023

出　　处：《口腔医学研究》2022年第10期950-953,共4页Journal of Oral Science Research

基　　金：大学生创新创业训练计划项目(编号:202012631029);厦门市医疗卫生指导性项目(编号:3502z20214ZD1269);厦门医学院附属口腔医院横向课题(编号:HX001)。

摘　　要：目的:使用高速涡轮牙科手机与不同转速下的电动高速牙科手机分别对离体牙进行牙体预备,分别比较其预备后的表面粗糙度、贴面修复后的微渗漏程度及抗折力。方法:选取新鲜拔除完整无龋坏的前磨牙60颗,按预备方式分为4组(n=15):涡轮气动牙科手机(A组)与200000 r/min(B组)、50000 r/min(C组)和20000 r/min(D组)的电动牙科手机对离体牙进行预备,预备后组内随机选取试件进行3组(n=5)检测:采用白光干涉仪测量表面粗糙度;用树脂水门汀粘接贴面后进行老化试验,在显微镜下观察贴面中线纵截面的微渗漏情况;以及应用电子万能试验机测量抗折力。结果:采用不同牙科手机及不同转速电动牙科手机进行牙体预备:直接观察预备体表面粗糙度,4组无显著性差异(P>0.05);贴面粘接后进行抗折力测试4组无显著性差异(P>0.05);老化循环后微渗漏深度四组间存在显著性差异(P<0.05)。结论:20万转速下的电动手机预备后的贴面平均微渗漏程度最小。而预备体表面粗糙度和贴面抗折力不受手机类型及转速的影响。Objective:To compare the surface roughness,the degree of microleakage,and fracture resistance of veneers after using air-turbine handpiece and electric handpiece at different speeds to prepare tooth in vitro.Methods:Sixty premolars without decay were extracted and divided into 4 groups(n=15)according to the way of preparation.Air-turbine handpiece(Group A)and electric handpiece with 200,000 r/min(Group B),50,000 r/min(Group C),and 20,000 r/min(Group D)were used to prepare tooth in vitro.White light interferometer was used to measure the surface roughness.The microleakage of the mid-longitudinal section was surveyed under a microscope after bonding veneers with resin cement and simulated for aging.The fracture resistance was measured by an electronic universal testing machine.Results:There was no significant difference on the surface roughness and fracture resistance between four groups(P>0.05).However,there was significant difference in the microleakage degree after aging test(P<0.05).Conclusion:The surface roughness and fracture resistance of veneers are not affected by the type and speed of handpieces.Electric handpiece at 200,000 r/min had the smallest average microleakage of veneers.

关 键 词：电动高速牙科手机 高速涡轮牙科手机 贴面 粗糙度 微渗漏 抗折力 

分 类 号：R783[医药卫生—口腔医学]