Clinical Study on Abfraction Lesions in Occlusal Dysfunction.

The abfraction theory states that under the action of the occlusal forces non-axially transmitted, the flexion of the tooth occurs in the cervical area, which initially leads to the appearance of cracks in the enamel and dentin, followed by the destruction of the dental structure. These lesions allow bacterial plaque retention, lead to dental hypersensitivity and can affect the vitality of the dental pulp. Thus, the study included 102 participants, of both sexes, 54% representing the male gender (55 subjects) and 46% the female gender (47 subjects), aged between 20 and 80, from the urban area 76% (77 subjects) and rural 24% (25 subjects), who came to the Dental Medicine office, between August 2018 and August 2019, representing 57.3%, of the total number of patients treated during the aforementioned period. They have been described the acid and abrasive processes involved in the generation of these lesions,and special attention was paid to the role of mechanical stress occurring at the occlusal level, due to the transmission of forces outside the dental axis.