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作者对７例牙周炎患者的１７０颗牙（９７０个部位）于治疗结束后一周作为纵向观察的基线，每隔２个月定位复查一次。以两次检查之间新出现≥２ｍｍ的附着丧失作为活动期的诊断标准。共观察６～１２个月，以探讨活动性破坏的发生规律，结果表明：活创性破坏部位的估计年发生率为２．８％；活动性最常发生于上颌双尖牙及上下颌磨牙，且最常发生于邻面和深牙周袋、提示牙周炎活动期有牙位和部位特异性。
The author of seven patients with periodontitis in 170 teeth (970 sites) one week after the end of treatment as the longitudinal observation of the baseline, positioning review every 2 months. To check between the two newly emerged ≥ 2mm loss of attachment as the active phase of the diagnostic criteria. A total of 6 to 12 months were observed to investigate the occurrence of active destruction, the results showed that: the estimated annual incidence of active site destruction was 2.8%; activity occurs most commonly in the maxillary bicuspids and maxillary mandibular molars , And most often occurred in the adjacent surface and deep periodontal pockets, suggesting periodontitis activity and periodontal site specificity.