Undershot commonly referred to as a "Monkey Jaw" is a fairly rare abnormality. This is where the lower incisors protrude too far forward in relation to the upper incisors. It is also common to find large lower anterior hooks and large upper caudal hooks on the molar arcades. Again the most common procedure to correct this abnormality is an "incisor reduction" and corrective floating, which has the same affect on the tempro-mandibular joint as the above overbite.
