Roumanas Eleni D, Freymiller Earl G, Chang Ting-Ling, Aghaloo Tara, Beumer John
Biomaterials and Hospital Dentistry, Weintraub Center for Reconstructive Biotechnology, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, California 90095-1668, USA.
Int J Prosthodont. 2002 Jul-Aug;15(4):325-32.
An analysis of retrospective data was conducted to establish the survival rates of osseointegrated implants used to retain orbital, nasal, and auricular prostheses over a 14-year period and to recommend guidelines in the restorative treatment of such facial defects.
Included in this study were all patients who received implant-retained prostheses for auricular, nasal, or orbital defects from 1987 to 2001 in the Maxillofacial Clinics at the UCLA and City of Hope Medical Centers. Data were obtained from patient charts. Two methods were used to determine survival rates: (1) the percentage of the total exposed implants that survived was determined, and (2) life table analysis was used to calculate cumulative survival rates at different time intervals.
A total of 207 implants were placed in 72 patients, and 182 implants had been uncovered. During the study period, 35 implants failed to integrate, and the survival rate for all exposed implants was 80%. Auricular implants showed the highest survival rate (95%), and orbital implants showed the lowest survival rate (53%). The life table analysis demonstrated a cumulative 6-year survival rate of 92% for auricular implants and 87% for piriform/nasal implants. In contrast, the survival rate for orbital implants showed a steady downward trend and reached 59% at 66 months.
It is possible to achieve high survival rates of implants in the auricular and piriform/nasal sites through careful presurgical and radiographic planning. The less favorable long-term survival of implants in the orbital rim, especially at irradiated sites, requires further study.
进行回顾性数据分析，以确定在14年期间用于固定眼眶、鼻和耳假体的骨整合种植体的存活率，并为这类面部缺损的修复治疗推荐指导原则。
本研究纳入了1987年至2001年在加州大学洛杉矶分校和希望之城医疗中心颌面诊所接受种植体固定假体修复耳、鼻或眼眶缺损的所有患者。数据从患者病历中获取。采用两种方法确定存活率：（1）确定存活的外露种植体总数的百分比，（2）使用生命表分析计算不同时间间隔的累积存活率。
共72例患者植入207枚种植体，其中182枚种植体已外露。在研究期间，35枚种植体未能成功整合，所有外露种植体的存活率为80%。耳部种植体的存活率最高（95%），眼眶种植体的存活率最低（53%）。生命表分析显示，耳部种植体的6年累积存活率为92%，梨状孔/鼻种植体为87%。相比之下，眼眶种植体的存活率呈稳步下降趋势，在66个月时降至59%。
通过仔细的术前和影像学规划，耳部和梨状孔/鼻部位的种植体有可能获得较高的存活率。眼眶缘种植体，尤其是在受照射部位，长期存活率较低，需要进一步研究。
