SCHNEIDER ANGLE ALONG WITH CURVATURE HEIGHT AND DISTANCE  A NEW PARADIGM INTHE MEASUREMENT OF ROOT CANAL CURVATURE AND ITS COMPARISON WITH CANAL ACCESS ANGLE.

Dr Manjunatha H Malur; Dr Anil Chandra

Volume : VI, Issue : V, May - 2017

SCHNEIDER ANGLE ALONG WITH CURVATURE HEIGHT AND DISTANCE A NEW PARADIGM INTHE MEASUREMENT OF ROOT CANAL CURVATURE AND ITS COMPARISON WITH CANAL ACCESS ANGLE.

Dr Manjunatha H Malur, Dr Anil Chandra

Abstract :

AIM: To find and record the Schneider angle with proposed curvature height and distance and to compare with Canal Access Angle. METHODOLOGY: One hundred human mandibular first and second molars were used for the study. After endodontic access, a size 10 k–file was placed in the mesiobuccal canal extending to the apical foramen and radiographs were taken by using Radiovisiography. Both Schneider and canal access angle with its respective linear counterparts (Curvature height and Curvature distance), is measured and calculated by using PLANMECA romexis (Helsinki Finland) software connected to the intraoral x–ray unit. Both the angles with its respective curvature height and distance were calculated and statistical analysis was done by using multiple linear regression analysis. RESULTS: A significant and positive correlation was observed between the Schneider angle (in degrees) and curvature height (mm) (r=0.7350, p<0.05), whereas a non–significant and positive correlation was observed between Schneider angle (in degrees) and curvature distance (mm) (r=0.0441, p>0.05). Multiple linear regression analysis showed that, the curvature height (mm) is contributing better (94.14%) as compared to curvature distance (–3.59%) on Schneider angle. CONCLUSIONS: Schneider angle dependent on the proposed curvature height and independent of curvature distance. This means that the curvature distance is a mere estimation of level of curvature whether curvature is in the coronal, middle or apical.