Kartal N, Cimilli H K
Department of Endodontics, Faculty of Dentistry, Marmara University, Istanbul-Türkiye.
J Endod. 1997 Jun;23(6):358-62. doi: 10.1016/S0099-2399(97)80182-3.
The objective of this study was to determine the frequency, degree of curvature, and the configuration of mesiobuccal and mesiolingual root canals of mandibular first molars. The degree of curvature and configuration of root canals creates some technical difficulties to the clinician during biomechanical preparation. Therefore this knowledge is essential for successful endodontic therapy. Six hundred and ninety-seven freshly extracted mandibular first molars were used in this study. After introducing 0.8 to 15 K reamers into the mesial root canals, the teeth were radiographed in buccolingual (clinical) and mesiodistal (proximal) directions. All samples showed curvatures at varying degrees in both views. There was a significant correlation between the degree of primary curvature of mesiobuccal and mesiolingual canals in clinical directions for total samples. When the primary curvature values of the mesial root canals were evaluated in Vertucci classification, the mesiobuccal and mesiolingual canals in Vertucci type VI were found as significantly correlated (r = 0.7173, p < 0.05). A significant correlation was seen between the secondary curvature values of clinical and proximal views of mesiolingual canal in Vertucci type VI (r = 0.9891, p < 0.05). The secondary curvature values in the clinical views of mesiobuccal and mesiolingual canals were found as significantly correlated in Vertucci type II.
本研究的目的是确定下颌第一磨牙近中颊根和近中舌根根管的频率、弯曲程度及形态。根管的弯曲程度和形态给临床医生在进行生物力学预备时带来了一些技术难题。因此，这些知识对于成功的根管治疗至关重要。本研究使用了697颗新鲜拔除的下颌第一磨牙。在将近中根管内插入0.8至15号扩孔钻后，对牙齿进行颊舌向（临床）和近远中向（近中）投照。所有样本在两种投照角度下均显示出不同程度的弯曲。对于全部样本，近中颊根管和近中舌根管在临床投照角度下的初始弯曲程度之间存在显著相关性。当根据Vertucci分类法评估近中根管的初始弯曲值时，发现Vertucci VI型中的近中颊根管和近中舌根管显著相关（r = 0.7173，p < 0.05）。在Vertucci VI型中，近中舌根管临床投照角度和近中向投照角度的继发弯曲值之间存在显著相关性（r = 0.9891，p < 0.05）。在Vertucci II型中，近中颊根管和近中舌根管临床投照角度的继发弯曲值显著相关。
