Department of Prosthodontics, Peking University School and Hospital of Stomatology, Zhong-Guan-Cun, Haidian District, 22 South Street, Beijing, 100081, China.
Foshan (Southern China) Institute for New Materials, Guangdong, China.
Clin Oral Investig. 2022 May;26(5):4217-4227. doi: 10.1007/s00784-022-04394-0. Epub 2022 Feb 7.
This study aims to analyze the 5-year occlusal change in posterior implant-supported single crowns and the association between the relative occlusal force (ROF) and peri-implant bone level.
Partially edentulous patients who had received implant-supported single crowns in the posterior region were included. Occlusal examinations with a computerized occlusion analysis system were conducted at 0.5, 3, 6, 12, 24, 36, 48, and 60 months after delivery of the implant-supported single crown. The ROFs of implant-supported single crowns, mesial adjacent teeth, and control natural teeth were recorded. Intraoral periapical radiographs were taken at each follow-up time to evaluate marginal bone level (MBL). Ordinary least square regression was used to analyze the association between ROF and MBL.
Thirty-seven posterior implant-supported single crowns in 33 participants (23.9 to 70.0 years) were followed up for 0.5 to 60 months [(42.4 ± 26.0) months]. The ROF of implant-supported single crowns increased from 2 weeks to 3 months (P < 0.01) and increased continuously between all two sequential time points from 6 to 36 months, with significant differences (P < 0.05). Then ROFs of implant-supported single crowns were significantly higher than those of control teeth at 48 and 60 months (P < 0.05). Regression analysis showed that ROF was significantly associated with MBL with a coefficient of 0.008 (P < 0.05).
The ROFs of posterior implant-supported single crown have significant change during 5 years' follow-up. The association between ROF and MBL has limited clinical significance.
Chinese Clinical Trial Registry: ChiCTR-ROC-17012240.
The occlusion of implant-supported single crowns should be carefully monitored during follow-up examinations, and occlusal adjustment should be considered to prevent overloading.
本研究旨在分析后牙种植体支持的单冠 5 年的咬合变化，以及相对咬合力（ROF）与种植体周围骨水平之间的关系。
纳入在后牙区接受种植体支持的单冠修复的部分缺牙患者。在种植体支持的单冠修复后 0.5、3、6、12、24、36、48 和 60 个月时，使用计算机咬合分析系统进行咬合检查。记录种植体支持的单冠、近中相邻牙和对照天然牙的 ROF。在每次随访时拍摄口腔根尖片，以评估边缘骨水平（MBL）。使用普通最小二乘法回归分析 ROF 与 MBL 之间的关系。
33 名患者（23.9 至 70.0 岁）的 37 个后牙种植体支持的单冠随访 0.5 至 60 个月[（42.4±26.0）个月]。种植体支持的单冠的 ROF 从 2 周增加到 3 个月（P<0.01），并从 6 个月到 36 个月连续各两个连续时间点持续增加，差异有统计学意义（P<0.05）。然后，种植体支持的单冠的 ROF 在 48 和 60 个月时明显高于对照牙（P<0.05）。回归分析显示，ROF 与 MBL 显著相关，系数为 0.008（P<0.05）。
在后牙种植体支持的单冠 5 年的随访中，ROF 有显著变化。ROF 与 MBL 之间的关系具有有限的临床意义。
中国临床试验注册中心：ChiCTR-ROC-17012240。
在随访检查中，应仔细监测种植体支持的单冠的咬合情况，并考虑进行咬合调整，以防止过载。
