Instituto de Implantologia, Lisboa, Portugal; Centro de Estudo de Medicina Dentária Baseada na Evidência, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal.
Instituto de Implantologia, Lisboa, Portugal; Centro de Estudo de Medicina Dentária Baseada na Evidência, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal; LIBPhys-FCT UID/FIS/04559/2013, Lisboa, Portugal.
J Endod. 2019 Apr;45(4):372-386.e4. doi: 10.1016/j.joen.2018.12.016. Epub 2019 Mar 2.
In the literature, several prevalence studies on root canal anatomy using cone-beam computed tomographic technology are currently available although their results remain disperse. This systematic review aimed to appraise and combine, under strict criteria conditions, selected prevalence studies in order to comprehend the distribution of root canal configuration types among different populations.
This systematic review was registered in PROSPERO. Six electronic databases were accessed, and the studies were selected according to a predefined inclusion/exclusion criteria. References of the collected studies and 3 peer-reviewed endodontic journals were hand searched. The authors of the selected studies were contacted for additional information. All eligible studies were submitted to a scientific merit evaluation by 2 evaluators independently, who also reached a final consensus for each study score using the Joanna Briggs Institute Critical Appraisal tool for prevalence studies.
Fifty-two studies from 28 different countries including 102,610 teeth and presenting a Joanna Briggs Institute Critical Appraisal tool average score of 80.5% were included in this review. Overall, results showed a wide prevalence range of the second mesiobuccal canal in maxillary first and second molars but also a high prevalence of single-rooted configuration in maxillary first premolars and mandibular second molars and 3-rooted morphology in the mandibular first molar of Asian populations.
The included studies showed a global tendency for a particular morphology in some groups of teeth, whereas others showed diversity in specific anatomic types among different populations.
目前，已有多项使用锥形束计算机断层扫描技术研究根管解剖结构的流行率研究，但结果仍存在差异。本系统评价旨在根据严格的标准条件评估和综合选择的流行率研究，以了解不同人群中根管形态类型的分布。
本系统评价已在 PROSPERO 中注册。共检索了六个电子数据库，并根据预先设定的纳入/排除标准选择研究。还对收集到的研究的参考文献和 3 种同行评议的牙髓学杂志进行了手工搜索。联系了选定研究的作者以获取更多信息。所有符合条件的研究均由 2 名评估员进行科学价值评估，他们还使用 Joanna Briggs Institute 流行率研究批判性评估工具对每项研究的评分达成最终共识。
本综述纳入了来自 28 个不同国家的 52 项研究，涉及 102610 颗牙齿，Joanna Briggs Institute 批判性评估工具的平均得分为 80.5%。总体而言，结果显示上颌第一和第二磨牙的第二近中颊根管的流行率范围很广，但上颌第一前磨牙和下颌第二磨牙的单根形态以及亚洲人群下颌第一磨牙的 3 根形态的流行率也很高。
纳入的研究表明，一些牙齿群体中存在特定形态的全球趋势，而其他研究则表明不同人群中特定解剖类型的多样性。
