Overbite. Animation showing a dental overbite, a malocclusion (misalignment of the teeth) where the upper jaw protrudes over the lower jaw. The incisors and canines are also protruding forwards. This condition, also known as retrognathism (Class II, division II), is caused by the upper and lower jaws being different sizes. Overbite can cause difficulty chewing and lead to inflammation of the temporomandibular joint, the joint between the lower jaw and skull. Treatment is with orthodontics and jaw surgery to create a normal occlusion (seen at end).HD master is flattened onto a black background, as seen in this preview. The original file has a transparent alpha channel and is available as the HD master of clip K003 3773.