How is the anterior deep overbite graduated

Patients with deep overbite of anterior teeth can be divided into 3 degrees according to the distance from the incisor tip of the upper incisor to the labial surface of the lower anterior teeth. The horizontal distance below 5 mm belongs to the first degree. The distance between 5 mm and 8 mm belongs to the second degree. The distance above 8 mm belongs to the third degree. The deep overbite of anterior teeth belongs to a common tooth deformity and can be divided into different types according to its etiology. The deep overbite of anterior teeth formed due to abnormal development of the jaw belongs to the bone type. If the etiology is abnormal neuromuscular reflex, it belongs to the functional type. Because of the number of anterior teeth, position, shape abnormalities caused by deep coverage, can be called tooth type, often need to choose the correction method according to the degree of bone non-adjustment.