Identification of risk factors for fracture of veneering materials and screw loosening of implant supported fixed partial dentures in partially edentulous cases
Identification of risk factors for fracture of veneering materials and screw loosening of implant supported fixed partial dentures in partially edentulous cases
复制标题
部分无牙颌病例中种植体支持的固定局部义齿饰面材料断裂和螺钉松动的危险因素识别
DOI：
10.1111/joor.12029
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
Kuboki T
中科院分区：
文献类型：
--
作者：
Noda K;Arakawa H;Maekawa K;Hara ES;Yamazaki S;Kimura-Ono A;Sonoyama W;Minakuchi H;Matsuka Y;Kuboki T
This retrospective study identified the risk factors for fracture of veneering materials and screw loosening of implant‐supported fixed partial dentures in partially edentulous cases. The study group included a total of 182 patients who were installed 219 suprastructures at the Fixed Prosthodontic Clinic of Okayama University Dental Hospital between February 1990 and March 2005 and were subdivided in two subgroups: 120 patients (149 facing suprastructures) were included in the subgroup to investigate the risk factors of fracture of veneering materials, and 81 patients (92 suprastructures) were included in the subgroup to identify the risk factors of abutment screw loosening. Each patient was followed up from the day of suprastructure installation until March, 2005. A Cox proportional hazards regression model was used to identify the risk factors related to technical complications, and eight factors were regarded as candidate risk factors. Screw retention was the significant risk factor for fracture of veneering materials, whereas connection of suprastructures with natural tooth was the significant risk factor for screw loosening. It was suggested that screw retention was a significant risk factor for the fracture of veneering materials, and connection of suprastructures with natural tooth was a significant risk factor for screw loosening. Future studies, involving dynamic factors (e.g. bruxism) as predictors as well, are more helpful to discuss the risk factor of fracture of veneering materials and screw loosening.
