SonicFill系统对Ⅱ类洞充填后微渗漏影响的研究

Effect of Sonicfill System on Microleakage of Class Ⅱ Resin Filling

目的:探讨树脂充填系统SonicFill对Ⅱ类洞树脂充填后微渗漏的影响。方法:收集口腔颌面外科门诊拔除的各类恒磨牙15例,每例样本中2个Ⅱ类洞随机分为实验组、对照组。实验组:用SonicFill超声树脂充填系统充填窝洞;对照组:用HerculitePrécis纳米树脂斜向分层充填窝洞。500次冷热循环实验后保存于0.5%碱性品红溶液中,24h后沿近远中向剖开,体视显微镜观察染色情况并记录评分(0-3);扫描电镜测量树脂与牙体组织间微缝隙宽度。轴壁和龈壁染料渗入深度采用Mann-Whitney U检验进行评估;采用两个样本t检验比较微缝隙的宽度,检验水准α设为0.05。结果:染料渗入评分结果表明:SonicFill组与对照组相比,染料渗入的深度明显不同,差异具有统计学意义(P<0.05);各组内轴壁染料渗入深度明显少于龈壁(P<0.05)。扫描电镜2000倍视野下微缝隙宽度测量结果表明:SonicFill组与对照组的微缝隙宽度存在明显不同,差异具有统计学意义(P<0.01);各组内轴壁与龈壁相比,轴壁微缝隙的宽度明显小于龈壁(P<0.01)。结论:SonicFill超声树脂充填系统能够有效减少Ⅱ类洞树脂充填术后微渗漏的发生。轴壁与龈壁相比,轴壁微渗漏明显小于龈壁。

Objective：To evaluate the effect of sonicfill system on microleakage of classⅡ resin filling.Methods：Fifteen extracted permanent molars with same caries in both mesial surface and distal surface were collected.One cavity was filled by sonicfill system（the experimental group）,and the other cavity was filled by Herculite Précis nano resin with oblique layered filling technology（the control group）.After 500 thermocycling,all samples were stained within 0.5%fuchsin solution for 24 hours,and teeth were mesio-distally cut along the tooth long axis.Stereomicroscope was employed to evaluate the dye penetration level（0-3）and scanning electron microscopy was used to observe the microleakage.Scores of dye penetration were analyzed by Mann-Whitney U test,and microcrack width by SEM was analyzed by t-test.Results：There were significant differences in the Dye penetrationscores between two groups（P〈0.05）.Microleakage of axial wall was significantly less than that of gingival wall（P〈0.05）.The micro-crack widths between axial wall and gingival wall were significant differentbetween two groups（P〈0.01）.Micro-crack width of axial wall was significantly less than gingival wall in each group（P〈0.01）.Conclusion：Sonicfill system can effectively reduce the resin microleakage of classⅡ resin filling and the microleakage of axial wall is less than that of gingival wall.