反在错畸形中比较多见，患者的牙列与正常，上牙列位于下牙列的唇侧。因此使上颌骨发育受阻，失去上颌骨限制的下颌骨过度的向前发育和前伸，造成面部中1／3的凹陷，下1／3的短缩，这类错特畸形对人体的功能、生长发育及面容均有较严重的影响。由于反随生长发育而症状逐渐加重 Anti malformations are more common in patients with dentition and normal, the dentition is located in the lower dentition of the labial side. So blocked the development of the maxilla, maxillary mandibular loss of excessive premature development and extension of the jaw, resulting in 1/3 of the face of the depression, 1/3 of the shortened, these kinds of special malformations on the human body function, Growth and face are more serious impact. As the anti-growth and development of symptoms gradually aggravated