Lee Dongseob, Ko Young-Chang, Seol Yang-Jo, Koo Ki-Tae, Lee Yong-Moo, Lee Jungwon
Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Republic of Korea.
National Dental Care Center for Persons With Special Needs, Seoul National University Dental Hospital, Seoul, Republic of Korea.
Clin Implant Dent Relat Res. 2023 Dec;25(6):1008-1018. doi: 10.1111/cid.13265. Epub 2023 Aug 13.
This study aimed to investigate factors influencing the survival of replaced dental implants.
Charts from 2005 to 2021 were reviewed. Replaced implants after removal for the first time were identified. Depending on their survival, the replaced group was divided into the surviving and second-removal groups. Risk factors affecting survival of replaced implants were evaluated considering clustering of multiple implants within patients.
The present study included 464 replaced implants of 370 patients, of which 429 and 35 implants were categorized into the surviving group and the second-removal group. The 5-year survival rate was 90.2 ± 0.18% in replaced implants at sites with a periodontitis history and 97.0 ± 0.15% at sites without a periodontitis history (p = 0.008). The 5-year survival rate was 89.1 ± 0.27% in replaced implants with guided bone regeneration (GBR) at first implant placement and 93.9 ± 0.14% at non-GBR (p = 0.032). The 5-year survival rate was 97.6 ± 0.13% in replaced implants with GBR and 90.3 ± 0.17% in replaced implants without GBR (p = 0.026). In the multivariable analysis adjusted for clinical variables, periodontitis history (adjusted hazard ratio [aHR] = 3.417; 95% confidence interval [CI] = 1.161-10.055), GBR at first implant placement (aHR = 2.152; 95% CI = 1.052-4.397) and non-GBR at primary implant replacement (aHR = 0.262; 95% CI = 0.088-0.778) were identified as independent risk factors for second implant removal.
Periodontitis history, GBR at first implant placement and non-GBR at primary implant replacement were identified as risk factors affecting the survival of replaced implants.
本研究旨在调查影响种植体置换后种植体存留的因素。
回顾2005年至2021年的病历。确定首次取出后进行置换的种植体。根据其存留情况，将置换组分为存留组和二次取出组。考虑到患者体内多个种植体的聚集情况，评估影响置换种植体存留的危险因素。
本研究纳入了370例患者的464颗置换种植体，其中429颗和35颗种植体分别被归入存留组和二次取出组。有牙周炎病史部位的置换种植体5年存留率为90.2±0.18%，无牙周炎病史部位的置换种植体5年存留率为97.0±0.15%（p = 0.008）。首次种植时采用引导骨再生（GBR）的置换种植体5年存留率为89.1±0.27%，未采用GBR的为93.9±0.14%（p = 0.032）。采用GBR的置换种植体5年存留率为97.6±0.13%，未采用GBR的置换种植体5年存留率为90.3±0.17%（p = 0.026）。在对临床变量进行校正的多变量分析中，牙周炎病史（校正风险比[aHR]=3.417；95%置信区间[CI]=1.161 - 10.055）、首次种植时采用GBR（aHR = 2.152；95% CI = 1.052 - 4.397）以及初次种植体置换时未采用GBR（aHR = 0.262；95% CI = 0.088 - 0.778）被确定为二次种植体取出的独立危险因素。
牙周炎病史、首次种植时采用GBR以及初次种植体置换时未采用GBR被确定为影响置换种植体存留的危险因素。
