Istanbul University, Faculty of Dentistry, Department of Oral and Maxillofacial Surgery, Istanbul-Turkey.
Med Oral Patol Oral Cir Bucal. 2011 Nov 1;16(7):e953-9. doi: 10.4317/medoral.17312.
The purpose of this clinical study was to evaluate the complications associated with the different attachments used in implant-supported overdentures, including prosthetic problems and implant failures. A comparison of ball, bar and Locator (Zest Anchors, Inc, homepage, Escondido, CA, USA) attachments, in completely edentulous patients with two, three or four implants, was conducted.
A total of 36 edentulous patients (20 female, 16 male) with a mean age of 66.3 years, were enrolled in the study. The patients were treated with 95 implants, for the prosthetic restoration of the maxilla or the mandible. The mean follow-up time was 41.17 months. Prosthetic complications including, fractured overdentures, replacements of O-ring attachment and retention clips, implant failures, hygiene problems, mucosal enlargements, attachment fractures, retention loss and dislodgement of the attachments were recorded and evaluated. The recall visits at 3, 6, 12 months and, annually thereafter.
Fourteen complications in the ballattachment group and 7 complications in the bar group were observed. No complications were observed in the locator group. The difference was found to be as statistically significant (p=0,009). Six of the 95 implants had failed. Totally 39 implant overdentures were applied. Three prostheses were renewed because of fractures.
Within the limits of the present study, it was concluded that the locator system showed superior clinical results than the ball and the bar attachments, with regard to the rate of prosthodontic complications and the maintenance of the oral function.
本临床研究的目的是评估种植体支持覆盖义齿中使用的不同附着体相关的并发症，包括修复体问题和种植体失败。对 2 个、3 个或 4 个种植体的完全无牙患者中使用球、杆和Locator（Zest Anchors，Inc，主页，Escondido，CA，USA）附着体进行了比较。
共有 36 名无牙患者（20 名女性，16 名男性），平均年龄 66.3 岁，纳入本研究。患者接受了 95 个种植体的治疗，用于上颌或下颌的修复体。平均随访时间为 41.17 个月。记录和评估了修复体并发症，包括义齿折断、O 型环附件和固位夹更换、种植体失败、卫生问题、黏膜增大、附着体折断、固位丧失和附着体脱位。在 3、6、12 个月和此后每年进行复诊。
球附着体组观察到 14 个并发症，杆附着体组观察到 7 个并发症。Locator 组未观察到并发症。差异具有统计学意义（p=0.009）。95 个种植体中有 6 个失败。共应用 39 个种植体覆盖义齿。由于骨折，有 3 个修复体需要更换。
在本研究的限制范围内，结论是定位器系统在修复体并发症的发生率和维持口腔功能方面，优于球和杆附着体，具有更好的临床效果。
