悬臂梁式种植固定义齿的回顾性研究

Survival of Implant-supported Fixed Partial Prostheses with Cantilevers: A Retrospective Analysis

目的:评价悬臂梁式种植固定义齿的长期临床效果。方法 :采用回顾性研究方法 ,收集2005-01—2011-06,在我科室采用悬臂梁式种植固定义齿修复58例患者(60个修复体,共103枚种植体)的临床及影像学资料。记录种植体的失败个数、修复体失败个数、边缘骨吸收情况、机械及生物并发症情况。结果:随访期内无种植体失败,有3个修复体失败。种植体7年累计存留率100%,修复体7年累计存留率为92.3%。随访期内并未见严重的边缘骨吸收,近悬臂端种植体周边缘骨吸收为(0.08±0.12)mm,远悬臂端种植体周边缘骨吸收为(0.09±0.14)mm。8个修复体(13%)、14枚种植体(14%)发生生物学并发症,11个修复体(18.3%)出现机械并发症。结论:本研究初步证实悬臂梁式种植固定义齿的修复方式临床效果是可靠的,可作为临床种植设计的一个可选方案。因较高的机械并发症,在选择螺丝固位方式时需加以注意。

Objective：To evaluate the long-term clinical and radiographic outcomes of implant-supported fixed partial dentures with cantilevers. Methods： The clinical and radiographic data of 103 implants-supported 60 fixed dentures with cantilevers in 58 patients were collected from January 2005 to June 2011 and retrospectively studied. Complication and failure of implants and/or prosthesis, peri-implant marginal bone loss, biological and technical complications were evaluated. Results： No implant failure was observed during the follow-up period. 3 prostheses were failed. The 7-year cumulative survival rate was 100% for implant-based analysis, and 92.3% for prostheses-based analysis. The mean peri- implant bone loss for implants mesial to cantilevers was （0.08±0.12） mm and （0.09±0.14） mm for implants distal to cantilever. 8 （13%） prostheses and 14 （14%） implants were exposed to biological complications, where as 11 （18.3%） prostheses were involved in technical complications. Conclusion： The retrospective study confirmed that implant-supported fixed partial dentures with cantilevers may be a valid treatment modality. Due to the high risk of mechanical complications, one should pay attention to the way of screw retention.