流动树脂衬垫对树脂充填二类洞临床效果影响

摘要

Objective To evaluate the performance of a hybrid resin composite in Class Ⅱ restorations with and without intermediate layer of flowable resin composite.Methods 65 participants received at least two Class Ⅱ restorations of the hybrid resin composite.One resin composite restoration of each pair was chosen at random to be restored without an intermediary layer (group A) (n =65).The other was restored with an intermediary layer with flowable resin composite (group B) (n =65).The restorations were evaluated using slightly modified USPHS criteria during 6 months,1 year and 2 years.Results Three drop outs were registered during the 2-year follow up.Five restorations were not acceptable in clinical,3 in group A and 2 in group B.The failure rate after 2 years was 4.8％ (3/62) for group A,3.2％ (2/62) for group B.No statistical difference was seen between restorations restored with and without flowable layer.Conclusion The hybrid resin composite shows a good clinical performance in Class Ⅱ restorations.The use of flowable resin composite as an intermediate layer does not result in improved effectiveness of the Class Ⅱ restoration.%目的 探讨流动树脂衬垫在树脂充填后牙二类洞中的作用.方法 选择65例口内同时存在两颗后牙需要二类洞修复的患者,采用自身对照研究,分为A、B两组各65例修复体,A组直接树脂充填,B组流动树脂对邻面龈壁进行洞衬后再树脂充填.6个月、1年、2年进行临床随访.结果 2年随访每组各有3名患者失访;5例修复体失败(A组3例,B组2例),失败率A组为4.8％(3/62),B组为3.2％(2/62),两组的临床效果比较差异无统计学意义(P＞0.05).结论 复合树脂修复后牙二类洞可以取得满意的临床效果,流动树脂进行邻面龈壁的洞衬没有明显提高修复效果.