According to retrospective clinical studies, periodontal treatment retains teeth. However, evidence on the effectivity of periodontal treatment stemming from the general population is lacking.

中文翻译：

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牙周治疗患者的牙齿脱落：基于登记和观察的分析

根据回顾性临床研究，牙周治疗可以保留牙齿。然而，缺乏来自普通人群的牙周治疗有效性的证据。