排龈联合流动树脂衬层技术修复楔状缺损临床疗效观察

目的：评估采用排龈联合流动树脂衬层技术修复楔状缺损的临床疗效。方法选择65例楔状缺损患者，每个患者的双侧上颌前磨牙均存在齐龈的4个楔状缺损（共260颗牙），将每个患者的4颗楔状缺损牙随机分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4组，分别用光固化复合树脂直接充填，排龈+光固化复合树脂直接充填，光固化流动树脂衬层+复合树脂充填，排龈+光固化流动树脂衬层+复合树脂充填4种方式进行修复，于修复后1年进行观察对比。以改良的美国公共卫生署的直接临床评价系统（USPHS）评估疗效，数据进行卡方检验。结果1年复查结果显示，色泽协调性、边缘着色、边缘密合性、表面形态4个方面，4组间A、B分级间差异均无统计学意义（P>0.05）。成功率方面Ⅰ组和Ⅳ组间差异有统计学意义（P<0.05），Ⅳ组排龈+光固化流动树脂衬层+复合树脂充填临床疗效最好。结论排龈联合光固化流动树脂衬层技术，然后再行复合树脂充填是比较好的楔状缺损修复方式。

Clinical effect of gingival retraction combined with lfowable composite resin as a liner for restoring dental wedge-shaped defects

ObjectiveTo evaluate the clinical effect of gingival retraction combined with flowable composite resin as a liner for restoring dental wedge-shaped defects.MethodsSixty-five patients with four equivalent non-carious cervical lesions on bilateral maxillary premolars were enrolled in this study. Group I was treated only with composite resin, group II was treated with gingival retraction technique and composite resin filling, group III was treated with flowable composite resin as a liner and then composite resin filling, group IV was gingival retraction combined with flowable composite resin as a liner and composite resin filling eventually. The patients were followed up for one year. The results were statistically analyzed. ResultsThere was significant difference in one year success rates between group I and group IV(P< 0.05). There was no significant difference in main indexes between A and B classification, including color match, marginal discolor, marginal adaptation and surface texture(P> 0.05) .ConclusionEffective gingival retraction combined with flowable composite resin as a liner is a good choice for treating dental wedge-shaped defects.