Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
J Prosthet Dent. 2010 Feb;103(2):118-26. doi: 10.1016/S0022-3913(10)60015-7.
Implant-retained extraoral prostheses are an acceptable solution for patients with facial defects. However, these prostheses have a limited service life. Little has been reported on survival periods of implant-retained extraoral prostheses and prosthetic complications of this treatment modality.
The purpose of this study was to estimate the survival rates of implant-retained extraoral prostheses and to analyze the frequency of prosthetic complications.
Seventy patients were treated with implant-retained extraoral prostheses. Each patient was examined with respect to the prosthesis appearance and abutment and attachment component complications at 6-month intervals over a period of 10 to 46 months. The Kaplan-Meier survival estimation method was used for the first and subsequent prostheses. The reasons for remaking prostheses were recorded. Complications of the abutment and attachment components and the prostheses were recorded. Frequency of complications was evaluated. Data were analyzed using the Fisher exact test (alpha=.05).
Thirty-two auricular, 25 orbital, and 13 nasal prostheses were evaluated. The Kaplan-Meier analysis revealed an estimated mean survival time of 14.5 months for the patients' first prostheses. The survival times for the first implant-retained auricular, orbital, and nasal prostheses were 14.1, 13.4, and 17.6 months, respectively. The survival times for the second implant-retained auricular, orbital, and nasal prostheses were 14.4, 15.3, and 14.0 months, respectively.
Implant-retained extraoral prostheses had limited survival rates. The primary reasons for making new prostheses were discoloration, tearing, and mechanical failures of the acrylic resin substructure or retentive elements. Common complications were the need for clip activation, loosening of bar screws and abutments, and loss of attachment between silicone and the acrylic resin substructure. (J Prosthet Dent 2010;103:118-126).
植入物保留的体外义齿是面部缺陷患者的一种可行的解决方案。
然而，这些义齿的使用寿命有限。
有关植入物保留的体外义齿的生存期限和这种治疗方式的修复体并发症的报道很少。
70 名患者接受了植入物保留的体外义齿治疗。
在 10 至 46 个月的时间内，每隔 6 个月对每位患者进行一次检查，检查内容包括义齿外观、基台和附着体部件的并发症。
使用 Kaplan-Meier 生存估计法对第一副和随后的义齿进行评估。
记录义齿修复的原因。
记录基台和附着体部件以及义齿的并发症。
评估并发症的频率。
使用 Fisher 确切检验（α=.05）进行数据分析。
评估了 32 个耳廓、25 个眼眶和 13 个鼻假体。
Kaplan-Meier 分析显示，患者第一副义齿的估计平均生存时间为 14.5 个月。
第一副植入物保留的耳廓、眼眶和鼻假体的生存时间分别为 14.1、13.4 和 17.6 个月。
第二副植入物保留的耳廓、眼眶和鼻假体的生存时间分别为 14.4、15.3 和 14.0 个月。
植入物保留的体外义齿的生存率有限。
制作新义齿的主要原因是丙烯酸树脂基底或固位体变色、撕裂和机械失效，以及夹扣激活、杆螺丝和基台松动、硅橡胶和丙烯酸树脂基底之间失去附着等常见并发症。
