OBJECTIVE Systematic review analyzing the treatment outcomes of cracked teeth that received endodontic treatment is unavailable. The purpose of this study was to examine the treatment outcome of cracked teeth that received root canal treatment and to determine factors that influenced outcome. MATERIALS AND METHODS The specific PIO questions were as follows: Population: patients who were healthy individuals ≥ 18 years old and required root canal treatment due to cracked tooth; Intervention: root canal treatment with at least 1 year in occlusal function; Outcomes: survival rate and pre-operative factors. Ovid, PubMed, and Cochrane databases were searched in conjunction with hand searching. Pooled survival rates were determined from a meta-analysis of the data retrieved from the articles. All statistics were performed by the Comprehensive Meta-Analysis software. RESULTS Four articles met the inclusion criteria. The overall tooth survival at 60 months was 84.1% (95%CI, 72.3-91.5%). Although no pre-operative factors had statistical significance, 4 factors had possible clinical significance. Teeth with single crack and teeth with cracks contained within crowns exhibited lower extraction risk, while teeth with pre-treatment periodontal probing > 3 mm and teeth that were terminal abutments showed a greater risk of extraction. CONCLUSION This systematic review determined the survival rate of endodontically treated cracked teeth to be moderately high. More studies in this area are, however, warranted before definitive conclusions can be derived. CLINICAL RELEVANCE In view of the relatively high survival rate, endodontic treatment rather than extraction should be considered for cracked teeth.

中文翻译：

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牙髓治疗裂牙的结果：系统评价和荟萃分析。

目的无法对接受牙髓治疗的裂牙的治疗结果进行系统评价。这项研究的目的是检查接受根管治疗的裂牙的治疗结果，并确定影响结果的因素。材料与方法具体的PIO问题如下：人群：年龄≥18岁的健康个体，由于牙齿破裂需要根管治疗的患者；干预：咬合功能至少1年的根管治疗；结果：生存率和术前因素。Ovid，PubMed和Cochrane数据库与人工搜索一起进行了搜索。通过对文章检索数据的荟萃分析确定合并的生存率。所有统计数据均由综合荟萃分析软件执行。结果四篇文章符合纳入标准。60个月时的总牙齿存活率为84.1％（95％CI，72.3-91.5％）。尽管术前因素无统计学意义，但有4个因素可能具有临床意义。单个裂纹的牙齿和冠内含裂纹的牙齿表现出较低的拔牙风险，而治疗前牙周探测> 3 mm的牙齿和末端基台的牙齿则具有更大的拔牙风险。结论本系统评价确定了经牙髓治疗的裂齿的存活率较高。但是，在得出明确结论之前，有必要在这一领域进行更多研究。临床相关性考虑到较高的生存率，