Objective This study aims to evaluate the time lapse between the endodontic and periodontal treatments of the combined periodontal-endodontic lesion to guide the clinical treatment. Methods A systemic literature search was performed in articles published from 1980 to March 2017 using the electronic databases, including PubMed, EMbase, Cochrane, Web of Science, CNKI, CBM, and Wanfang Databases. Results After screening, two randomized controlled trials, two prospective case series studies, and eight case reports were ultimately included. All clinical studies and case reports were treated with root canal therapy and periodontal nonsurgical or periodontal surgical treatment, with root canal therapy as the initial treatment step. Changes in the periodontal probing depth and attachment loss were reported in all clinical studies and case reports. Conclusion An observational period between the endodontic and periodontal nonsurgical treatments may not be required. However, given that the quality of several included studies was limited, and the number of randomized controlled trials was small, a large number of randomized controlled trials are needed to verify this result.%目的 评估牙周来源的牙周牙髓联合病变以及真正联合病变(牙周病变和牙髓病变共存)患牙的牙周治疗时机,从而指导临床治疗.方法 在PubMed、EMbase、Cochrane、Web of Science、CNKI、CBM、万方数据库中搜索1980年至2017年3月间关于牙周牙髓联合病变治疗的相关文章,并对其进行分析.结果 最终纳入2篇随机对照研究、2篇前瞻性病例系列研究和8篇病例报告.所有研究病例均采用根管治疗和牙周非手术治疗或牙周手术治疗,且根管治疗是综合治疗的第一步;观察指标包括牙周探诊深度及附着丧失等.结论 对于牙周来源的牙周牙髓联合病变和真正的联合病变患牙,牙髓治疗和牙周非手术治疗间可能不需要观察期,但此结论还需大样本前瞻性随机对照临床研究来验证.
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