AimTo assess periodontal stability and the association between tooth‐ and patient‐related factors and tooth loss during supportive periodontal care (SPC).Materials and MethodsA prospective observational study was carried out on previously treated periodontitis patients followed up for 5 years in SPC. The risk profile (low, moderate, high) of each patient based on periodontal risk assessment (PRA) scoring at baseline was evaluated, and tooth loss rates were analysed.ResultsTwo hundred patients were included in the study, and 143 had 5‐year follow‐up data available for analysis. The overall annual tooth loss per patient was 0.07 ± 0.14 teeth/patient/year. Older age, smoking, staging and grading were associated with increased tooth loss rates. Most patients whose teeth were extracted belonged to the PRA high‐risk group. Both PRA and a tooth prognosis system used at baseline showed high negative predictive value but low positive predictive value for tooth loss during SPC.ConclusionsOverall, the tooth loss rate of periodontitis patients in this prospective cohort study under SPC in private practice was low. Both tooth‐based and patient‐based prognostic systems can identify high‐risk cases, but their positive predictive value should be improved.

中文翻译：

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支持性牙周护理期间的牙齿脱落：一项前瞻性研究

目的评估支持性牙周护理 (SPC) 期间牙周稳定性以及牙齿和患者相关因素与牙齿脱落之间的关系。材料和方法对既往治疗过的牙周炎患者进行了一项前瞻性观察研究，并在 SPC 中随访 5 年。根据基线时的牙周风险评估 (PRA) 评分，评估每位患者的风险状况（低、中、高），并分析牙齿脱落率。 结果该研究纳入了 200 名患者，其中 143 名患者进行了 5 年随访‐up 数据可用于分析。每名患者每年的总体牙齿脱落量为 0.07 ± 0.14 颗牙齿/患者/年。年龄较大、吸烟、分期和分级与牙齿脱落率增加有关。大多数拔牙患者属于 PRA 高危人群。基线时使用的 PRA 和牙齿预后系统对 SPC 期间的牙齿脱落显示出较高的阴性预测值，但阳性预测值较低。结论总体而言，在私人诊所进行 SPC 的这项前瞻性队列研究中，牙周炎患者的牙齿脱落率较低。基于牙齿和基于患者的预后系统都可以识别高危病例，但其阳性预测价值还有待提高。