Becker W, Becker B E
Department of Periodontology, University of Southern California, Los Angeles, USA.
J Prosthet Dent. 1995 Jul;74(1):51-5. doi: 10.1016/s0022-3913(05)80229-x.
This retrospective report presents findings on 22 patients with 24 implants replacing single molars with implant-supported restorations. Patients with known bruxism habits were not considered for single-molar implant replacement. The patients underwent follow-up for an average of 24 months. The cumulative success rate was 95%, which reflects the loss of one 5 x 6 mm wide implant. Eleven implants were placed in edentulous ridges, and 13 were placed in extraction sockets. Most of the implants were placed in type B and C bone quantity and type 2 and 3 bone quality. All implants were restored on abutments with nonrotating gold cylinders. The occlusion for all restorations was developed to minimize centric contacts and lateral interferences. The frequency of gold retaining-screw loosening was obtained for 21 patients. The gold retaining screws loosened in eight implants between one and three times (38%). No incidence of crown or implant fracture occurred. Within the limits of this study, replacement of single-tooth molars by implant-supported restorations was predictable; however, a high incidence of gold screw loosening was seen.
本回顾性报告介绍了22例患者使用种植体支持修复体替换单颗磨牙的24颗种植体的研究结果。有磨牙习惯的患者不考虑进行单颗磨牙种植体替换。患者平均随访24个月。累积成功率为95%，这反映了一颗5×6毫米宽的种植体失败。11颗种植体植入无牙嵴，13颗植入拔牙窝。大多数种植体植入B型和C型骨量以及2型和3型骨质区域。所有种植体均使用非旋转金柱基台进行修复。所有修复体的咬合设计均旨在尽量减少正中接触和侧向干扰。统计了21例患者金固位螺钉松动的频率。8颗种植体的金固位螺钉松动1至3次（38%）。未发生牙冠或种植体骨折事件。在本研究范围内，种植体支持修复体替换单颗磨牙具有可预测性；然而，金螺钉松动的发生率较高。
