Rokni Hadiseh A, Alimohammadi Mona, Hoshyari Narjes, Charati Jamshid Y, Ghaffari Amirmohammad
Department of Endodontics, Mazandaran University of Medical Sciences, Sari, IRN.
Department of Oral & Maxillofacial Radiology, Mazandaran University of Medical Sciences, Sari, IRN.
Cureus. 2023 Oct 11;15(10):e46854. doi: 10.7759/cureus.46854. eCollection 2023 Oct.
The presence of an additional root, known as a radix, in the lower molars is of significant importance in the context of root canal therapy since it has the potential to contribute to treatment failure. Furthermore, it is imperative to take this circumstance into consideration when doing tooth extraction using a radix. The present study investigated the anatomical characteristics and prevalence rates of radix entomolaris and paramolaris in mandibular molars using cone beam computed tomography.
Cone beam computed tomography scans of the lower molars of 376 patients were processed through Newtom's NNT viewer software. Radix type, radix root canal length, radix root curvature, Vertucci's classification of the canal, and gender of patients were recorded. The results of the research were analyzed with chi-squared.
The prevalence of radix was found to be 0.74%, with entomolaris and paramolaris present in 54.54% and 45.46% of cases, respectively. There was no statistically significant difference between the two variables of radix type and gender, as indicated by a p-value of 0.08. The mean curvature and length of the radix root were measured to be 56.63° and 15.09 mm, respectively. The average root curvature in individuals diagnosed with radix entomolaris and paramolaris was found to be 62.33° and 49.80°, respectively. The study found that the root curvature of entomolaris exhibited a statistically significant difference compared to paramolaris (P=0.031). The mean length of the radix entomolaris and paramolaris roots was found to be 15.50 and 14.60 mm, respectively. There was no statistically significant difference observed in the mean root lengths of the various radix types (P=0.37). According to Vertucci's classification, all radixes were classified as type 1.
The investigated population had a low incidence of radix. The curvature of radix entomolaris exhibited a statistically significant increase compared to radix paramolaris. There was no observed correlation between gender and the length of radix roots in relation to the type of radix root.
在下颌磨牙中存在额外的牙根，即所谓的副根管，在根管治疗的背景下具有重要意义，因为它有可能导致治疗失败。此外，在使用副根管进行拔牙时，必须考虑到这种情况。本研究使用锥形束计算机断层扫描（CBCT）调查了下颌磨牙中额外根（entomolaris根和paramolaris根）的解剖特征和患病率。
对376例患者的下颌磨牙进行锥形束计算机断层扫描，并通过Newtom的NNT viewer软件进行处理。记录副根管类型、副根管长度、副根管弯曲度、根管的Vertucci分类以及患者性别。研究结果采用卡方检验进行分析。
发现副根管的患病率为0.74%，其中entomolaris根和paramolaris根分别占病例的54.54%和45.46%。副根管类型和性别这两个变量之间没有统计学上的显著差异，p值为0.08。副根管的平均弯曲度和长度分别测量为56.63°和15.09毫米。在诊断为entomolaris根和paramolaris根的个体中，平均根弯曲度分别为62.33°和49.80°。研究发现，entomolaris根的弯曲度与paramolaris根相比具有统计学上的显著差异（P = 0.031）。entomolaris根和paramolaris根的平均长度分别为15.50毫米和14.60毫米。在不同副根管类型的平均根长度上未观察到统计学上的显著差异（P = 0.37）。根据Vertucci分类，所有副根管均被分类为1型。
所调查人群中副根管的发生率较低。与paramolaris根相比，entomolaris根的弯曲度有统计学上的显著增加。在副根管类型方面，未观察到性别与副根管长度之间的相关性。
