科威特人群下颌前磨牙的根管和牙根形态：CBCT 临床研究。
Root and Canal Morphology of Mandibular Premolar Teeth in a Kuwaiti Subpopulation: A CBCT Clinical Study.
机构信息
Department of Farwania Dental, Ministry of Health, Kuwait City, Kuwait.
Department of Restorative Dentistry, Riyadh Elm University, College of Dentistry, Riyadh, Saudi Arabia.
出版信息
Eur Endod J. 2020 Dec;5(3):248-256. doi: 10.14744/eej.2020.40085.
OBJECTIVE
To study the root and root canal morphology of mandibular premolars in a Kuwaiti subpopulation using cone-beam computed tomography (CBCT).
METHODS
152 CBCT images were obtained from the radiology department archives of four dental centers in Kuwait. A total of 476 mandibular premolar teeth were analyzed by two observers. The number of roots, root canal configuration types and canal curvature measurements were examined. The relationship between sex, tooth position, and incidence of an additional canal were compared using the chi-square test, and the level of significance was set at 0.05 (P=0.05).
RESULTS
The number of roots in mandibular first premolars was one in 73.9%, two in 24.9%, three and four in 1.2%. On the other hand, the number of roots in mandibular second premolars was one in 79.2% and two in 20.8%. Based on Vertucci's classification system, 18.7% of the teeth were type II followed by type VI (14.3%). The majority of the examined teeth were straight (74.8%) and the incidence of distal root angulation was about 21%. Canal configurations not included in the Vertucci classification were reported in 102 teeth (21.4%). Variability was significantly higher in the second premolars compared to first premolar (P<0.05).
CONCLUSION
The Kuwaiti population has complex root canal morphology in mandibular premolar teeth.
目的
使用锥形束 CT（CBCT）研究科威特人群下颌前磨牙的根管和牙根形态。
方法
从科威特四家牙科中心的放射科档案中获取了 152 个 CBCT 图像。由两位观察者对 476 颗下颌前磨牙进行了分析。检查了牙根数量、根管形态类型和根管弯曲度测量值。使用卡方检验比较了性别、牙齿位置和额外根管发生率之间的关系，显著性水平设为 0.05（P=0.05）。
结果
下颌第一前磨牙的牙根数为单根占 73.9%，双根占 24.9%，三根和四根占 1.2%。另一方面，下颌第二前磨牙的牙根数为单根占 79.2%，双根占 20.8%。根据 Vertucci 分类系统，18.7%的牙齿为 II 型，其次是 VI 型（14.3%）。大多数检查的牙齿为直根（74.8%），远中根弯曲的发生率约为 21%。在 102 颗牙齿中报告了未包含在 Vertucci 分类中的根管形态，占 21.4%。第二前磨牙的变异性明显高于第一前磨牙（P<0.05）。
结论
科威特人群下颌前磨牙的根管形态复杂。
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