BackgroundThe aim of this retrospective study was to investigate the risk of tooth loss for teeth adjacent and nonadjacent to dental implants.MethodsA total of 787 patients with an average follow‐up of 57.1 months were examined to define the tooth loss, cumulative survival rate, and odds ratio (OR) for teeth adjacent versus nonadjacent to implants. A multivariate logistic regression was employed to assess the association between dental history and various recorded etiologies of tooth loss among teeth adjacent to implants.ResultsThe incidence of tooth loss for teeth adjacent to implants was 8.1% at the tooth level and 15.1% at the patient level, while 0.7% and 9.5% at the tooth and patientlevel for teeth nonadjacent to implants. The 10‐year cumulative survival rate for teeth adjacent to implants was 89.2%, and the primary etiology of tooth loss was root fracture (45.2%). The risk of tooth loss among teeth adjacent versus nonadjacent to implants was significantly higher (OR 13.15). Among teeth adjacent to implants, root canal‐treated teeth had a significantly higher risk of tooth loss due to root fracture (OR 7.72), a history of existing restoration significantly increased the risk of tooth loss due to caries (OR 3.05), and a history of periodontitis significantly increased the risk of tooth loss due to periodontitis (OR 38.24).ConclusionThe present study demonstrated that after patients received dental implant treatment, teeth adjacent to implants showed a 13.2‐fold higher risk of tooth loss compared to teeth nonadjacent to implants, with the primary etiology being root fracture.

中文翻译：

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邻近和不邻近牙种植体的牙齿的存活率：一项回顾性队列研究

背景本回顾性研究的目的是调查与牙种植体相邻和不相邻的牙齿的牙齿缺失风险。方法对平均随访 57.1 个月的 787 名患者进行了检查，以确定牙齿缺失情况、累积生存率和牙齿缺失情况。邻近种植体牙齿与不邻近种植体牙齿的比值比 (OR)。采用多变量逻辑回归来评估牙科病史与种植体邻近牙齿的各种记录的牙齿缺失病因之间的关联。结果种植体邻近牙齿的牙齿缺失发生率在牙齿水平为 8.1%，在患者水平为 15.1% ，而对于与种植体不相邻的牙齿，在牙齿和患者层面分别为 0.7% 和 9.5%。种植体邻牙的10年累积存活率为89.2%，牙齿缺失的主要原因是牙根折断（45.2%）。与种植体相邻的牙齿与非种植体相邻的牙齿相比，牙齿脱落的风险明显更高（OR 13.15）。在与种植体相邻的牙齿中，经过根管治疗的牙齿由于牙根折断而导致牙齿脱落的风险显着较高（OR 7.72），现有修复体的历史显着增加了由于龋齿而导致牙齿脱落的风险（OR 3.05），并且有牙周炎病史显着增加因牙周炎导致牙齿脱落的风险（OR 38.24）。结论本研究表明，患者接受种植牙治疗后，与种植体相邻的牙齿相比，与种植体不相邻的牙齿相比，与种植体相邻的牙齿的牙齿脱落风险高出 13.2 倍，主要病因是根折。