CAJ | 학술논문

目的探讨不同角度洞缘斜面对复合树脂充填后微渗漏的影响.方法 30颗离体磨牙随机分为三组,每组10颗牙,分别制备1 mm长的洞缘斜面及45°、70°、90°的洞缘角,并用Prime&Bond NT粘结剂及复合树脂直接进行树脂充填修复.经500次冷热循环后行印度墨水染色1周,体视显微镜下观测各充填体边缘微渗漏的长度.结果 70°洞缘角染料渗入最少,与45°、90°洞缘角差异均有统计学意义(t=3.530、4.179,均P＜0.05).结论为了预防树脂微渗漏的发生,应该将洞缘角设计成70°的短斜面.
목적 탐토불동각도동연사면대복합수지충전후미삼루적영향.방법 30과리체마아수궤분위삼조,매조10과아,분별제비1 mm장적동연사면급45°、70°、90°적동연각,병용Prime&Bond NT점결제급복합수지직접진행수지충전수복.경500차랭열순배후행인도묵수염색1주,체시현미경하관측각충전체변연미삼루적장도.결과 70°동연각염료삼입최소,여45°、90°동연각차이균유통계학의의(t=3.530、4.179,균P＜0.05).결론 위료예방수지미삼루적발생,응해장동연각설계성70°적단사면.
Objective To study the effects of resin micro-leakage of different angles of cavity margins with composite resin filling.Methods Thirty extracted human molar with occlusal surfaces preparing hole into 3mm × 3mm × 3mm.Specimens were randomly divided into 3 groups,1 mm slopes of cavity margins were designed respectively,and three kinds of angles of cavity margins(45°,70°,90°)were filled on the ocelusive surfaces,then using Prime&Bond NT and Composite resin(ChrismaA2)to repair the holes directly.After 500 thermal cycling,all specimens were immersed in Indian ink for one week and the penetration depth was examined under stereo microscope.Results Cavity margin angles of 70°was better than those of 90° and 45°,the results was statistically significant(t=3.530,4.179,all P＜0.05).Conclusion To reduce the occurrence of the resin micro-leakage,cavity margin angles should be designed as short slant with an angle of 70°or so.