背景:根管治疗的疗效受到根管解剖的透彻理解的极大影响。本系统综述和荟萃分析旨在彻底研究永久性前磨牙(PM)的根形态和根管构型(RMCC)。
方法:按照PRISMA指南进行综合分析。文献探索是在四个电子数据库(PubMed,Embase,科克伦,和WebofScience)。使用解剖学质量评估(AQUA)工具对纳入的研究进行偏倚风险评估。利用SPSS和RevMAN5.3.3进行数据分析。荟萃分析采用95%置信区间计算比值比(OR)。
结果:在选定的82项研究中,59项研究在第一领域(目标和主题特征)表现出潜在的偏差,其次是领域三(方法论表征)。大多数上颌PM1具有单根(46.7%)或双根(51.9%),而三根变异并不常见(1.4%)。相反,大多数其他PM表现出单根。就运河配置而言,上颌PM1s主要是双明显的运河(87.2%),大多数上颌PM2显示单管(51.4%)或双管(48.3%)。下颌PMs主要以单管为特征,占下颌PM1s的78.3%和下颌PM2s的90.3%。亚组分析显示,与高加索人相比,亚洲人中单根和单线PM的发生率更高。此外,女性表现出更高的单根PMs发病率,
结论:综合分析表明,上颌PM1主要具有双根和双管,而上颌PM2s和下颌PMs的主要特征是单根单管。值得注意的是,单根和单管在女性和亚洲样本中更为普遍。
BACKGROUND: The efficacy of root canal treatment is greatly impacted by a thorough understanding of root canal anatomy. This systematic review and meta-analysis aim to thoroughly investigate the root morphology and canal configuration (RMCC) of permanent premolars (PMs).
METHODS: A comprehensive analysis was conducted following the PRISMA guidelines. Literature exploration was carried out across four electronic databases (PubMed, Embase, Cochrane, and Web of Science). The risk of bias assessment was conducted for the included studies utilizing the Anatomical Quality Assessment (AQUA) tool. Data analysis was performed utilizing SPSS and RevMAN5.3.3. The meta-analysis was applied with a 95% confidence interval to calculate odds ratios (OR).
RESULTS: Among the 82 selected studies, 59 studies exhibited potential bias in domain one (objective(s) and subject characteristics), followed by domain three (methodology characterization). The majority of maxillary PM1s had either single root (46.7%) or double roots (51.9%), while three-rooted variants were uncommon (1.4%). Conversely, most other PMs exhibited a single root. In terms of canal configuration, maxillary PM1s predominantly featured double distinct canals (87.2%), with the majority of maxillary PM2s displaying either a single canal (51.4%) or double canals (48.3%). Mandibular PMs were primarily characterized by single canals, accounting for 78.3% of mandibular PM1s and 90.3% of mandibular PM2s. Subgroup analyses revealed higher incidences of single-rooted and single-canalled PMs among Asians compared to Caucasians. Additionally, women exhibited a higher incidence of single-rooted PMs, while men showed a greater frequency of double-rooted PMs.
CONCLUSIONS: The comprehensive analysis indicated that maxillary PM1s predominantly possess double roots and double canals, whereas maxillary PM2s and mandibular PMs were primarily characterized by single-rooted with a single canal. Notably, single root and single canal were more prevalent among women and Asian samples.