An excessive vertical overlap of the upper teeth over the lower teeth is a dental condition requiring professional evaluation. This condition is characterized by a visible gap between the upper and lower front teeth when the mouth is closed. For example, if the upper front teeth significantly cover the lower front teeth, exceeding a typical overlap of a few millimeters, the presence of this condition is suggested.
Recognition of this dental misalignment is important for both aesthetic and functional reasons. Addressing this condition can improve chewing efficiency, speech clarity, and reduce the risk of temporomandibular joint (TMJ) disorders. Historically, correction of this condition has evolved from rudimentary dental appliances to advanced orthodontic treatments, reflecting ongoing improvements in dental care.