Tooth morphology and characteristics of non-carious cervical lesions

Abstract

Objectives: Two 3-dimensional models, one of a lower second premolar and one of a lower central incisor were used to investigate effects of load on the location and magnitude of cervical strains. Methods: Point loads of 100 N were applied to the model premolar (at the cusp tip, parallel and 45°to the long axis of the tooth) and incisor (at the mid-buccal point on incisal edge, parallel and 45°to the long axis of the tooth). Outputs were presented in the form of tensile-strain contours and vector plots. Results: Strains were concentrated near the cementoenamel junction (CEJ) regardless of load direction, and oblique loading showed higher tensile strains, opposite to the point of loading, than..