蝶形洞及固位沟在Ⅱ类洞修复中的应用

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

目的:通过蝶形洞预备加颊舌(腭)固位沟修复Ⅱ类洞和常规(牙合)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,用同一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。

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.