Tooth surface loss may be purely physiological and occurs as a consequence of aging. However, certain non-carious factors may lead to tooth surface loss pathologically. The etiology of such non-carious tooth surface wear includes abrasion, attrition, erosion, and abfraction.Anterior facial height has a significant impact on the length of the ramus. Patients with deep bite will exhibit a shorter lower facial height; hence, restoring the vertical dimension esthetically without affecting the health of the oral tissues is highly challenging. Clinicians may decide to increase OVD based on the amount of interocclusal space required to restore the dentition to proper esthetics, form, and function. The decision whether to restore at increased or existing OVD is made by assessing the free-way space and dentoalveolar compensation in distal extension edentulous and full mouth rehabilitation in completely worn cases.
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