Comparison of angle of curvature between incisal-shifted access and traditional lingual access for mandibular anterior teeth using CBCT - an in vivo study.

Creating an appropriate access cavity is crucial for successful root canal treatment. While preparing access cavities in anterior teeth, the standard approach has been employed to create a triangular outline on the center of the lingual surface. However, this traditional lingual access (TLA) cavity preparation often results in the access cavity direction differing from the direction of the root canal, particularly in the apical third. This is because the long axis of the tooth’s crown often differs from the long axis of the root canal, creating a discrepancy that makes it challenging to align the access cavity perfectly with the canal. Hence in this study, the incisal shifted access is evaluated.