Question 447 · LDEK · Non-carious lesions of dental hard tissues
Indicate the correct definition of abfraction:
- A. wedge-shaped defect with sharp margins located on the enamel-cementum border.
- B. mechanical wear of incisal edges of teeth as a result of parafunctional movements of the mandible.
- C. wear or loss of a tooth surface caused by chemical processes.
- D. loss of dental hard tissues caused by a direct friction between the tooth and external objects.
- E. biological process of tooth degradation.
Hint
Abfraction is linked to occlusal stress flexing the tooth at the neck — recall the typical shape and location of the lesion.
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