Gambarini Gianluca, Piasecki Lucila, Ropini Priscilla, Miccoli Gabriele, Nardo Dario Di, Testarelli Luca
Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Rome, Italy.
Department of Periodontics and Endodontics, University at Buffalo, Buffalo, NY, USA.
Eur J Dent. 2018 Jul-Sep;12(3):434-438. doi: 10.4103/ejd.ejd_116_18.
In the present study, confluent canals in the mandibular first molar's mesial root were investigated in an Italian population by means of cone-beam computed tomography (CBCT).
A total of 200 molars, selected from the CBCT examinations of 130 patients who required this type of X-ray study as part of their dental treatment, were examined. The evaluated parameters were number of canals, root canal system configuration, presence of apical confluences, distance between confluences and apical foramina, which canal had a higher degree of curvature, and symmetry between left and right elements in the same individual.
Percentages of the cases were reported.
All the examined roots presented two canals. In 59% of cases, a Vertucci Type IV canal configuration was observed, while in 41% of cases, a Type II configuration was observed. Apical confluences were present in 41% of cases. The average distance between confluences and apical foramina was 2.85 mm. When confluences were present, the mesiobuccal canal showed a higher degree of curvature in 78% of cases. Symmetry in Vertucci configuration was seen in 88% of cases.
Apical confluences in the mesial roots of mandibular molar can be present in a significantly high number of cases, and their recognition is essential to prevent the iatrogenic errors during canal instrumentation.
在本研究中,通过锥形束计算机断层扫描(CBCT)对意大利人群下颌第一磨牙近中根中的融合根管进行了研究。
从130例因牙科治疗需要进行此类X线检查的患者的CBCT检查中选取了总共200颗磨牙进行检查。评估的参数包括根管数量、根管系统形态、根尖融合的存在情况、融合处与根尖孔之间的距离、哪条根管弯曲度更高以及同一个体左右侧结构之间的对称性。
报告病例的百分比。
所有检查的牙根均有两条根管。59%的病例观察到Vertucci IV型根管形态,而41%的病例观察到II型形态。41%的病例存在根尖融合。融合处与根尖孔之间的平均距离为2.85毫米。当存在融合时,78%的病例中近中颊根管弯曲度更高。88%的病例中Vertucci形态存在对称性。
下颌磨牙近中根中的根尖融合在相当多的病例中可能存在,识别它们对于防止根管预备过程中的医源性错误至关重要。