بررسي ميزان شيوع انحناي باكولينگوالي و زاويه انحناي كانال ريشه پالاتال مولر اول فك بالا در ساكنان شهر يزد

An investigation on the prevalence of the bauccolingual curvature and measuring the curvature angle of the palatal root of first maxillary molars among Yazd population (Research)

The palatal root of first maxillary molars has a buccolingual curvature. That in most cases could not be seen in radiographic images resulting in complications such as root perforation and ledge during canal preparation. Due to the importance of this subject, the present study was performed to evaluate the prevalence of buccolingual curvature and measuring the curvature angle of the palatal root of first maxillary molars among Yazd population. In order to do this study, 120 extracted maxillary molars were selected, mesiobuccal radiographics were taken, than using tracing paper the curvature of the palatal roots were determined by Schneider technique. The results showed that seventy- three cases (60.83%) were curved buccally, two cases (1.67%) were curved lingually and forty - five cases (37.5%) were straight. The angle of canal curvature was ranged from 0 to 30 degrees in 90 cases (75%), 30 to 45 degrees in 27 cases (22.5%) and 45 to 60 degrees in 3 cases (2.4%).