Attard Nikolai J, Zarb George A
Department of Prosthodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada.
J Prosthet Dent. 2003 Apr;89(4):352-9. doi: 10.1067/mpr.2003.91.
The clinical success of implant-supported fixed partial dentures has been documented. However, few studies have reported long-term results or any association between implant outcomes and host determinants.
This study reports on implant and prosthesis outcomes in a group of partially edentulous patients treated with Brånemark implants in the posterior zones. It also examines factors described in the medical history that may influence implant survival.
The charts of patients treated with implants from 1983 and followed prospectively through December 2001 at the University of Toronto were reviewed. One hundred thirty partially edentulous patients treated with implant-supported restorations in the posterior zones (area distal to mental foramen) were selected. Implant and prosthesis treatment outcomes were recorded and analyzed through the Kaplan-Meier and Cox regression methods (P<.05).
A total of 130 patients received 432 Brånemark dental implants in 174 posterior edentulous spans. The mean age of the patients at the time of insertion of the implants was 50.97 +/- 13.27 years. At 15 years, the overall implant and prosthesis survival rates were 91.6% and 89%, respectively. At 5 years, the survival rate of the wide-platform 5-mm-diameter implants was 76.3%. Implant diameter (P=.0001) and a history of a chronic medical condition (P=.01) were correlated with implant survival outcomes.
High success of implant-supported prostheses in the posterior zones of both the maxilla and mandible. It corroborated other studies that have shown higher failure rates for wide-platform implants, emphasizing the need for proper establishment of clinical trials prior to marketing of new implant designs.
种植体支持的固定局部义齿的临床成功已有文献记载。然而，很少有研究报告长期结果或种植体结果与宿主决定因素之间的任何关联。
本研究报告一组在后牙区接受Brånemark种植体治疗的部分牙列缺损患者的种植体和修复体结果。它还研究了病史中可能影响种植体存活的因素。
回顾了1983年接受种植体治疗并在多伦多大学前瞻性随访至2001年12月的患者病历。选择了130例在后牙区（颏孔远端区域）接受种植体支持修复的部分牙列缺损患者。通过Kaplan-Meier和Cox回归方法记录和分析种植体和修复体治疗结果（P<0.05）。
共有130例患者在174个后牙无牙间隙中植入了432颗Brånemark牙种植体。植入种植体时患者的平均年龄为50.97±13.27岁。15年时，种植体和修复体的总体存活率分别为91.6%和89%。5年时，宽平台5毫米直径种植体的存活率为76.3%。种植体直径（P = 0.0001）和慢性疾病史（P = 0.01）与种植体存活结果相关。
在上颌和下颌后牙区，种植体支持的修复体成功率很高。这证实了其他研究中显示宽平台种植体失败率较高的结果，强调了在新种植体设计上市前进行适当临床试验的必要性。
