残根牙体剩余量对纤维桩核全冠修复体力学性能的影响  

Effects of the amount of residual tooth on the anti-fracture property under lateral loading in fiber post-core and full crown system

作　　者：聂二民[1] 张春元[1] 陈霞云[2] 鲁洁 杜发亮[4] 亓莉莉[1] 

机构地区：[1]中山大学附属第一医院口腔科,医师广东510080 [2]中山大学第三附属医院口腔科,主治医师广东510630 [3]广东省中医二院口腔科,医师广东510095 [4]广州医学院口腔医院,医师广东350001

出　　处：《口腔颌面修复学杂志》2009年第1期5-8,共4页Chinese Journal of Prosthodontics

基　　金：广东省科技厅社会发展项目(2005B30901004)

摘　　要：目的:评价侧向加载条件下,不同牙体剩余量对纤维桩复合树脂核全冠修复体抗折性能的影响。方法:将正畸拔除的单根前磨牙分为5组(0mm组、1mm组、2mm组、3mm组和对照组),离体牙行纤维桩复合树脂核金属烤瓷全冠修复,使用速率为1mm/min的45°角侧向加载;结果:0mm组的荷载力值(600.94±83.30N)和1mm组的荷载力值(665.46±58.81N)小于2mm组(949.94±74.80N)、3mm组(1004.52±93.99N)和对照组(1026.87±79.59N),存在显著性差异(P<0.05)。结论:对于纤维桩复合树脂核全冠修复体,随着牙体剩余量的增加,修复体的抗折能力也增加,因此,临床上要尽可能保留较多的牙体组织,使修复效果更好。Objective： Evaluate the effects of the different amount of residual tooth on the fracture resistance ability to oblique loading in fiber post-core and full crown. Methods： Fifty recently extracted single rooted lower premolars from orthodontic patients were divided into 0mm, 1mm, 2mm, 3mm and the control group. All the teeth were restored with fiber post-core and full crown system. The specimens were loaded with loading direction at 45-degree to the tooth axis and crosshead speed of lmm/min. Results： The loading force of 0mm group（600.94± 83.30N） and lmm group（665.46± 58.81N） was significantly lower than that in 2mm group （949.94 ± 74.80N）, 3mm group （1004.52± 93.99N）and the control group （1026.87± 79.59N）（P〈0.05）. Conclusion： The fracture resistance ability rises with the increase of the amount of residual tooth in the full crown restoration with fiber post and composite resin core. So in order to get the best repair effect, we must retain more tooth tissue.

关 键 词：残根 牙体剩余量 纤维桩 侧向加载 

分 类 号：R783[医药卫生—口腔医学]