CAJ | 학술논문

目的：比较2种不同激光对硬化牙本质与复合树脂粘接强度的影响。方法选择牙本质视觉分级3级以上牙面磨损的后牙30颗，按照随机数字表法随机分为Er，Cr：YSGG激光处理组（ E组）、Nd：YAG激光处理组（ N组）和对照组，联合Adper Prompt L－Pop处理、Z350复合树脂充填，置于37℃生理盐水中24 h，制作微拉伸试件并进行微拉伸粘接强度测试。采用SPSS13．0软件对微拉伸粘接强度值进行单因素方差分析。结果 E组粘接强度（24．71±3．13）MPa，N组粘接强度（21．72±2．36）MPa，对照组粘接强度（18．61±2．01）MPa。 E组的粘接强度最高，3组之间相比较差异均有统计学意义（P＜0．05）。体视显微镜观察结果发现断裂多发生于牙本质－树脂粘接界面。结论 Er，Cr：YSGG激光和Nd：YAG激光均能够提高硬化牙本质与复合树脂的粘接强度，且Er，Cr：YSGG激光处理后获得的粘接强度更高。
목적：비교2충불동격광대경화아본질여복합수지점접강도적영향。방법선택아본질시각분급3급이상아면마손적후아30과，안조수궤수자표법수궤분위Er，Cr：YSGG격광처리조（ E조）、Nd：YAG격광처리조（ N조）화대조조，연합Adper Prompt L－Pop처리、Z350복합수지충전，치우37℃생리염수중24 h，제작미랍신시건병진행미랍신점접강도측시。채용SPSS13．0연건대미랍신점접강도치진행단인소방차분석。결과 E조점접강도（24．71±3．13）MPa，N조점접강도（21．72±2．36）MPa，대조조점접강도（18．61±2．01）MPa。 E조적점접강도최고，3조지간상비교차이균유통계학의의（P＜0．05）。체시현미경관찰결과발현단렬다발생우아본질－수지점접계면。결론 Er，Cr：YSGG격광화Nd：YAG격광균능구제고경화아본질여복합수지적점접강도，차Er，Cr：YSGG격광처리후획득적점접강도경고。
Objective To compare the effect of different kinds of lasers on micro-tensile bond strength of non-carious sclerotic den-tin.Methods Thirty human molars with occlusal wear were randomly divided into group E ,group N and the control group .Group E were treated with Er,Cr:YSGG laser,while group N were treated with Nd:YAG laser.Then all three groups were treated with Adper Prompt L-Pop,filled with Z350 resin,and preserved in normal saline (37 ℃)for 24 h.Then fatigue test pieces were made and the mi-cro-tensile bond strength was evaluated .Results were subject to statistical analysis using one-way analysis of variance (ANOVA).Re-sults The bonding strength was (24.71 ±3.13)MPa in group E,(21.72 ±2.36)MPa in group N,and (18.61 ±2.01)MPa in the control group.The differences among all groups were statistically significant (P<0.05).The breakage mostly happened in adhesive dentine surface .Conclusions The bonding strength of molars to Z 350 resin can be increased by Er ,Cr:YSGG laser and Nd:YAG la-ser,and the former is more effective .