Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Endodoncia, Buenos Aires, Argentina.
Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Biofísica y Bioestadística, Buenos Aires, Ar.
Acta Odontol Latinoam. 2022 Dec 31;35(3):164-170. doi: 10.54589/aol.35/3/164.
The aim of the present study was to evaluate the presence of maxillary first and second molars with a C-shaped canal system in an Argentine subpopulation, and to classify them.
Of the 332 CBCTs initially evaluated, 120 met the selection criteria. Once the presence of a C-shaped canal system had been established, the teeth were classified following Martins et al. Data were expressed as absolute frequencies, percentages with of 95% confidence intervals, according to the score test. Comparisons were analyzed by Chi-square test and Fisher' exact test, with 5% significance level.
It was found that 5 out of 120 first molars (4%) and 17 out of 152 second molars (11%) had a C-shaped canal system. Regarding the classification applied, of 5 C-shaped first molars, 2 corresponded to type E2 (40%), 2 corresponded to type C (40%), and 1 corresponded to type B1 (20%). Of 17 C-shaped second molars, 4 resembled a type A (24%), 7 resembled a type B1 (41%), 5 resembled a type B2 (29%), and 1 resembled a type C (6%). UC1 and UC2 configurations were the most common at all levels except apical level.
The prevalence of C-shaped canal system pattern in maxillary first and second molars was estimated for the first time in an Argentine subpopulation, in vivo. Knowledge of these data should help clinicians during endodontic treatment.
本研究旨在评估阿根廷亚人群上颌第一和第二磨牙中 C 型根管系统的存在，并对其进行分类。
在最初评估的 332 例 CBCT 中，有 120 例符合选择标准。一旦确定存在 C 型根管系统，就按照 Martins 等人的方法对牙齿进行分类。数据以绝对频率和 95%置信区间的百分比表示，根据评分检验。采用卡方检验和 Fisher 确切检验进行比较，显著性水平为 5%。
发现 120 颗第一磨牙中有 5 颗（4%），152 颗第二磨牙中有 17 颗（11%）具有 C 型根管系统。根据应用的分类，5 颗 C 型第一磨牙中，2 颗属于 E2 型（40%），2 颗属于 C 型（40%），1 颗属于 B1 型（20%）。17 颗 C 型第二磨牙中，4 颗类似于 A 型（24%），7 颗类似于 B1 型（41%），5 颗类似于 B2 型（29%），1 颗类似于 C 型（6%）。UC1 和 UC2 构型在除根尖水平外的所有水平都最为常见。
首次在阿根廷亚人群中体内评估了上颌第一和第二磨牙 C 型根管系统的流行情况。这些数据的知识应有助于临床医生进行牙髓治疗。
