粘结桥中使用非刚性连接体修复2个缺失后牙  

Restore two posterior teeth with modified resin-bonded-bridge

作　　者：谭京[1] 姜慧[2] 王新知[1] Michael G.Botelho 

机构地区：[1]北京大学口腔医学院.口腔医院修复科,北京100081 [2]北京友谊医院口腔科 [3]Prince Philip Dental Hospital,University of Hong Kong

出　　处：《北京大学学报（医学版）》2010年第5期575-577,共3页Journal of Peking University:Health Sciences

摘　　要：目的:探讨在粘结桥中加入非刚性连接体用来修复2个缺失后牙。方法:在临床上选择缺失2个后牙且对颌为真牙的病例。共20例,男性9例,女性11例,平均年龄45.6岁,上颌12例,下颌8例。修复体中双尖牙的固位体与栓体连接,栓道与桥体连接,通过栓体与栓道将两部分连接在一起。修复体试戴后使用树脂粘接剂PANAVIAF粘结。结果:20例修复体平均使用时间为28.8个月,最长使用时间为42个月。20例病例中只有1例远中固位体发生脱落。经过表面处理后重新粘接,使用良好。所有基牙没有发现有继发龋和牙龈炎。结论:使用非刚性连接体,允许修复体在受到载荷时产生一定的自由动度,降低了金属固位体与树脂粘接面的应力,从而减少了脱粘接的发生。此种方法扩大了粘接桥的适应证,可以取得较好的临床治疗效果。Objective：To restore two posterior teeth with resin-bond-bridge with attachments.Methods：Twenty patients were selected with two adjacent posterior teeth missing and the opposite teeth were natural teeth.The mean age was 45.6 years old,9 male and 11 female.The maxillary cases were 12 and mandibules case were 8.The female part of attachment was attached with the retainer on the bicuspid teeth;the male part was attached with the pontic.After try-in,the two parts were adhered to the abutments separately and joined by the attachment.Results：The mean survival time of the 20 cases was 28.8 months,and the max was 42 months.In only one case the posterior part debonded,and it resumed being used after rebonding.Conclusion：In recent years the successful rate of resin-bond-bridge has got close to that of the traditional bridge.Most RBB were used to restore the single missing tooth.Now RBB with non-rigid connector can restore two missing teeth.When the teeth get stress,the directiors of stress are different.The longer span of RBB with rigid connector,the bigger interbutment stress on the adhere layer.With the non-rigid connector the stress between the retainer and the adhensive layer can be reduced.Our clinic treatment showed that this kind of method got good results and even the service time was not very long.

关 键 词：非刚性连接体 牙应力分析 牙修复体 

分 类 号：R783.3[医药卫生—口腔医学]