Krishnamurthy Navin H, Jose Sharon, Thimmegowda Umapathy, Bhat Prasanna K
Department of Pedodontics and Preventive Dentistry, RajaRajeswari Dental College and Hospital, Bengaluru, Karnataka, India.
Int J Clin Pediatr Dent. 2021 Sep-Oct;14(5):628-632. doi: 10.5005/jp-journals-10005-2030.
Visualizing the pulp cavity requires adequate knowledge of the size, morphology, and variation of the root canals of primary teeth. The morphology of the root canals in deciduous teeth causes difficulties during endodontic treatment. There have not been many studies on root canal variations in primary teeth in the Indian population.
To assess the variation in the root and canal morphology of primary maxillary second molars using cone-beam computed tomography (CBCT) in the pediatric Indian population.
The institutional database and private diagnostic centers were used to gather CBCT images of 25 children (50 images) between the age-group of 5 years and 9 years. The CBCT images were rebuilt using Scanora software, and the data were assessed and analyzed using the SPSS version for Windows.
Out of 50 primary maxillary second molars, the majority of the second molars had three roots and three canals (Variant I) which account for 66% of teeth. Variant II had three roots and three canals with distobuccal and palatal roots fused in 14% of cases whereas 18% of cases showed three roots and four canals in which mesiobuccal root had two canals (Variant III). The remaining 2% of cases showed four roots with four canals (Variant IV) which were statistically significant.
We concluded that within the constraints of our study, there was a difference in the root canal configuration of primary maxillary second molars in the investigated group of the Indian population.
Krishnamurthy NH, Jose S, Thimmegowda U, Evaluation of Anatomical Variations in Root and Canal Morphology of Primary Maxillary Second Molars: A Cone-beam Computed Tomography Study. Int J Clin Pediatr Dent 2021;14(5):628-632.
要清晰显示髓腔,需要充分了解乳牙根管的大小、形态及变异情况。乳牙根管的形态给牙髓治疗带来了困难。针对印度人群乳牙根管变异的研究并不多。
利用锥形束计算机断层扫描(CBCT)评估印度儿科人群中上颌乳第二磨牙的牙根和根管形态变异情况。
通过机构数据库和私人诊断中心收集25名5至9岁儿童的CBCT图像(共50张)。使用Scanora软件重建CBCT图像,并运用适用于Windows的SPSS版本对数据进行评估与分析。
在50颗上颌乳第二磨牙中,大多数第二磨牙有三个牙根和三个根管(变异I型),占牙齿总数的66%。变异II型有三个牙根和三个根管,其中远中颊根与腭根融合,占14%;18%的病例显示有三个牙根和四个根管,其中近中颊根有两个根管(变异III型)。其余2%的病例显示有四个牙根和四个根管(变异IV型),具有统计学意义。
我们得出结论,在本研究的限制范围内,印度人群的被调查组中上颌乳第二磨牙的根管形态存在差异。
Krishnamurthy NH, Jose S, Thimmegowda U, 上颌乳第二磨牙牙根和根管形态的解剖变异评估:一项锥形束计算机断层扫描研究。《国际临床儿科牙科学杂志》2021年;14(5):628 - 632。