Hsu Kuang-Wei, Shen Yu-Fu, Wei Pein-Chi
Lecturer, Department of Prosthodontics, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan city, Taiwan, Republic of China.
Assistant Professor, Department of Prosthodontics, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan city, Taiwan, Republic of China.
J Prosthet Dent. 2017 Mar;117(3):363-366. doi: 10.1016/j.prosdent.2016.07.023. Epub 2016 Oct 17.
In addition to the original abutments provided by implant companies, compatible computer-aided design and computer-aided manufacturing (CAD-CAM) abutments are also available from different manufacturers. However, the combination of abutments and implant systems from different manufacturers may lead to mechanical problems between components. Little has been reported on the clinical performance of this treatment option.
The purpose of this retrospective case series was to evaluate the outcome of compatible CAD-CAM titanium abutments (TiAs) for posterior single-implant tooth replacement (PSITR) up to 6 years after insertion.
Eighty-one patients (34 men, 47 women) who received PSITR restored with compatible CAD-CAM TiAs and had a final recall examination between May 2014 and April 2015 were included in this study. Clinical and radiographic examinations were documented. Retrospective evaluation of the patient records was also performed. Correlations between bone-level changes and variables were calculated using the Spearman correlation.
Implant and prosthesis survival rates were 100%. Twenty technical complications were observed, including 9 decementations of the crown, 6 screw loosenings, and 5 ceramic fractures. Periimplant mucositis was diagnosed in 36 patients (44.4%) and periimplantitis in 6 patients (7.4%). Correlation analysis showed a significant effect of the extent of periodontal bone loss of the remaining teeth on the marginal bone-level changes around implants (r=0.548, P<.001).
Compatible CAD-CAM TiAs provide a viable treatment option for PSITR. However, in light of relatively high screw-loosening and decementation rates, choosing appropriate cements and abutment manufacturers is essential to improve the clinical performance of this treatment option.
除了种植体公司提供的原装基台外，不同制造商也提供兼容的计算机辅助设计和计算机辅助制造（CAD-CAM）基台。然而，来自不同制造商的基台和种植体系统组合可能会导致部件之间出现机械问题。关于这种治疗方案的临床性能，鲜有报道。
本回顾性病例系列的目的是评估兼容的CAD-CAM钛基台（TiA）用于后牙单颗种植体牙齿替换（PSITR）植入后长达6年的效果。
本研究纳入了81例患者（34例男性，47例女性），这些患者接受了用兼容的CAD-CAM TiA修复的PSITR，并在2014年5月至2015年4月期间进行了最终复诊检查。记录了临床和影像学检查情况。还对患者记录进行了回顾性评估。使用Spearman相关性计算骨水平变化与变量之间的相关性。
种植体和修复体生存率均为100%。观察到20例技术并发症，包括9例牙冠松动、6例螺钉松动和5例陶瓷骨折。36例患者（44.4%）被诊断为种植体周围黏膜炎，6例患者（7.4%）被诊断为种植体周围炎。相关性分析表明，剩余牙齿的牙周骨丧失程度对种植体周围边缘骨水平变化有显著影响（r = 0.548，P <.001）。
兼容的CAD-CAM TiA为PSITR提供了一种可行的治疗方案。然而，鉴于螺钉松动和松动率相对较高，选择合适的粘结剂和基台制造商对于提高这种治疗方案的临床性能至关重要。
