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aristocort believed that abfraction can be associated with age-related wear of dental tissues, but they conducted a small number of clinical studies. Lee and Eakle were the first to describe the defects that can arise from stress, from bending stress in the neck area. Later, their theory was confirmed, deciding that the formation of a defect occurs as a result of biomechanical overstrain associated with large forces during static compression (swallowing, bruxism) and dynamic function (chewing). The size of Triamcinolone acetonide depends on the degree of occlusal stress, on the duration of the action of occlusal forces, direction, frequency and place of application.
The etiology of abfraction leaves a lot of room for thought and controversy. Initially, abfraction defects began to be associated with improper use of aristocort and incorrect selection. But this theory could not explain much. For example, the appearance of defects on the approximal or lingual surfaces of the teeth, where the toothbrush is difficult to penetrate; the occurrence of abfraction not on all teeth, but on certain groups; why the number of defects increased, despite the change in brush stiffness and the correction of the selection of personal hygiene products.
Patients with bruxism were monitored. It was decided that occlusal abrasion facets should be counted as evidence of abfraction because they are the result of contact between antagonistic teeth [17,18]. However, it was found that not all teeth with non-carious lesions have abrasion facets and not all teeth with abrasion facets have non-carious lesions in the cervical region.
Triamcinolone acetonide points out that sinceThe vitality of abfraction is facilitated by the preparation of cavities, weakening the tubercles of the tooth, as a result of which, under the influence of the occlusal load, they are deformed and displaced.
So, let us give a comparative description of abfraction and wedge-shaped defects. According to the available observations, it can be said that the abfraction defect can be in the form of a step or a ledge in the neck region.
Morphological changes occur in the enamel, since elastic dentin is less susceptible to stress from occlusion.