科研之友
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摘要
Previous studies have shown that the prevalence of a second mesiobuccal canal (MB2) in the mesiobuccal root of maxillary molars is inversely correlated to age, and also correlated with the location within the three sections of the tooth (i.e., coronal, middle and/or apical). However, little is known whether this finding is true for populations from different ethnic backgrounds. The aim of this study was to investigate the prevalence of MB2 in the mesiobuccal root of the first and second maxillary molars in a southern Chinese subpopulation by using cone-beam computed tomography (CBCT), and to investigate whether these findings correlate with patient age, gender, location within the tooth and tooth position. A total of 337 male and 310 female adult patients from Southern China with healthy, untreated, well-developed maxillary molars were enrolled. Maxillary first (n = 953) and second (n = 1066) molars were analyzed in vivo using CBCT scanning. Teeth with three roots were identified, and the presence of MB2 was analyzed for correlation with patient age, gender, location within the tooth and tooth position. Interestingly, a positive correlation was observed between the prevalence of MB2 and age. In addition, there was a correlation between both gender (male) and tooth position (left side) with higher MB2 prevalence. MB2 was more distinct in the middle than in the coronal and apical third. Significant associations were also found between the overall presence of MB2 and patient gender, age and tooth position. To sum up, the prevalence of MB2 in maxillary molars is declining in younger patients, which may be a result of evolution. The detective rate of MB2 decreases from middle to, coronal, and further to apical third. In addition, we found an association with gender, age and tooth position with MB2.
- 出版日期2017
- 单位南方医科大学
