Root canal curvature.

摘要

We wish to share with readers a simple method to record and evaluate the degree of severity of canal curvature in human teeth.As is known to all, substantial curvatures in root canals lead to increased difficulty in root canal preparation (Schneider 1971, Alodeh & Dummer 1989, Alodeh et al. 1989, Dummer et al. 1989, Schafer et al. 2002, Willershausen et al. 2008, Unal et al. 2009, Zheng et al. 2009). To describe the severity of curved canals, Schneider (1971) initially put forward the concept of the angle of root canal curvature. Later, Lim & Webber (1985) suggested that a landmark at the apical limit of instrumentation should be identified and that this position should be incorporated in any description of canal curvature, rather than the use only the root apex. Dummer and coworkers (Alodeh & Dummer 1989, Alodeh et al.