Faculty of Odontology, Malmö University, 214 21 Malmö, Sweden.
Department of Prosthodontics, Faculty of Odontology, Malmö University, 214 21 Malmö, Sweden.
Medicina (Kaunas). 2023 Sep 5;59(9):1603. doi: 10.3390/medicina59091603.
: Implant-supported single crowns have become a routine approach for the replacement of missing single teeth, being considered as one of the most common ways of rehabilitation when adjacent teeth are healthy. The present retrospective study aimed to investigate the risk factors possibly associated with failure and technical complications of implant-supported single crowns and their supporting implants. : Patients treated at one faculty (2009-2019) were considered for inclusion. Complications investigated included ceramic fracture/chipping, crown loss of retention/mobility, crown failure/fracture, loosening/loss/fracture of prosthetic screw, and implant failure/fracture. Any condition/situation that led to the removal/replacement of crowns (implant failure not included) was considered prosthesis failure. Univariate/multivariate Cox regression models were used to evaluate the associations between clinical covariates and failure. : 278 patients (358 crowns) were included. Mean ± SD follow-up was 56.5 ± 29.7 months. Seven implants (after a mean of 76.5 ± 43.7 months) and twenty crowns (21.3 ± 23.5 months) failed. The cumulative survival rate (CSR) for crowns was 93.5% after 5, remaining at 92.2% between 6 and 11 years. The most common reasons for crown failure were porcelain large fracture ( = 6), crown repeatedly loose ( = 6), and porcelain chipping ( = 5). Men and probable bruxism were identified in the Cox regression model as being associated with crown failure. The most common observed technical complications were mobility of the crown and chipping of the ceramic material, with the latter being observed even in crowns manufactured of monolithic zirconia. Cases with at least one technical complication (not considering loss of screw hole sealing) were more common among probable bruxers than in non-bruxers ( = 0.002). Cases of ceramic chipping were more common among bruxers than in non-bruxers ( = 0.014, log-rank test). : Probable bruxism and patient's sex (men) were factors associated with a higher risk of failure of implant-supported single crowns.
: 种植体支持的单冠已成为修复缺失单颗牙齿的常规方法，被认为是当邻牙健康时最常见的修复方法之一。本回顾性研究旨在探讨与种植体支持的单冠及其支持种植体失败和技术并发症相关的可能危险因素。: 研究纳入了在一个学院（2009-2019 年）接受治疗的患者。研究中调查的并发症包括陶瓷碎裂/崩瓷、冠固位力丧失/动度增加、冠失败/折断、修复体螺丝松动/脱落/折断以及种植体失败/折断。任何导致冠（不包括种植体失败）拆除/更换的情况都被认为是修复体失败。采用单变量/多变量 Cox 回归模型评估临床变量与失败之间的相关性。: 共纳入 278 名患者（358 个冠）。平均随访时间为 56.5 ± 29.7 个月。7 个种植体（平均随访 76.5 ± 43.7 个月后）和 20 个冠（21.3 ± 23.5 个月后）失败。冠的累积生存率（CSR）在 5 年后为 93.5%，在 6 至 11 年内保持在 92.2%。冠失败的最常见原因是瓷大块折断（ = 6）、冠反复松动（ = 6）和瓷崩瓷（ = 5）。Cox 回归模型中发现男性和可能的磨牙症与冠失败有关。最常见的技术并发症是冠动度和陶瓷材料崩瓷，即使在全瓷氧化锆制成的冠中也观察到了后者。与非磨牙症患者相比，可能磨牙症患者中出现至少一种技术并发症（不考虑螺丝孔密封丢失）的情况更为常见（ = 0.002）。磨牙症患者中陶瓷崩瓷的情况更为常见（ = 0.014，log-rank 检验）。: 可能的磨牙症和患者性别（男性）是与种植体支持的单冠失败风险增加相关的因素。
