蝶形洞及固位沟在Ⅱ类洞修复中的应用

目的通过蝶形洞预备加颊舌(腭)固位沟修复Ⅱ类洞和常规胎面扩展形成鸠尾固位修复Ⅱ类洞的比较,观察其临床效果.方法选取550例需要制备Ⅱ类洞修复的患牙,随机分为2组(实验组和对照组),分别用(牙合)面扩展形成鸠尾固位和(牙合)面制备成蝶形洞及颊舌(腭)固位沟,用同-种复合树脂充填修复,随访2a,从脱落率、边缘密合性、继发龋、(牙合)面磨耗、牙髓反应、边缘着色等方面评价疗效.结果蝶形洞制备加颊舌固位沟和(牙合)面扩展形成鸠尾固位,2种固位方法经统计学检验,无显著差异(P＞0.05).结论蝶形洞制备加颊舌固位沟在修复Ⅱ类洞时能收到和普通鸠尾固位相同的修复效果.

Application of saucer shaped cavity and retentive groves in class Ⅱ cavity restoration

PURPOSE: To observe the clinical effects of class II cavity restoration by using saucer shaped cavity and retentive grooves and dovetail retentive cavity. METHODS: 550 cases needing to have class II cavity preparations were divided into two groups randomly to have class II cavity restoration by using saucer shaped cavity and retentive groups or dovetail retentive cavity. The same light cured posterior composite resin restorative material was used 2 groups. After two years of follow-up, The clinical effects were recorded and evaluated. RESULTS: There was no significant difference in two groups (P>0.05) in respects to loss of retention, margin sealing, Secondary caries, grooves occlusal abrasion, pulp reaction and margin coloration. CONCLUSION: Using saucer shaped cavity and retentive grooves had the similar effect to dovetail retentive cavity.