Tanaka K, Tanaka S
Department of Orthodontics, School of Dentistry, Aichi-Gakuin University, Naogya, Japan.
Aichi Gakuin Daigaku Shigakkai Shi. 1990 Jun;28(2):683-95.
Since the malocclusion involved with a disharmony between the upper and lower jaws is generally treated with growth stimulation and inhibition to correct the disharmony, orthodontic treatment for this type of malocclusion is usually started at an early age. On the other hand, the case of crowding which has no such problem is caused by so called arch length discrepancy; discrepancy between teeth and jaw sizes. This type of maloccusion, therefore, is usually treated with extraction of teeth and in most of these cases treatment is started after the permanent dentition is established and growth and development of the maxilla is fairly well completed. Actually, however, case of crowding often have skeletal disharmony as a potential problem, in which cases the orthopedic approach is thought to be better if started rather early. This is because the orthodontic approach alone is not enough to solve skeletal problems, which problems are better handled before the teeth are moved. This procedure can prevent excessive tooth movement. The two cases reported here with crowding as the chief complaint were treated by the early orthopedic approach for potential skeletal problems prior to orthodontic correction. The results indicate the effectiveness of this procedure.
由于上下颌不协调导致的错颌畸形通常采用生长刺激和抑制的方法来纠正这种不协调，因此这类错颌畸形的正畸治疗通常在早期开始。另一方面，不存在这种问题的牙列拥挤情况是由所谓的牙弓长度差异引起的，即牙齿大小与颌骨大小之间的差异。因此，这类错颌畸形通常采用拔牙治疗，并且在大多数情况下，治疗在恒牙列建立且上颌生长发育基本完成后开始。然而，实际上，牙列拥挤的病例往往潜在存在骨骼不协调问题，在这种情况下，如果尽早开始，正畸治疗方法会更好。这是因为仅靠正畸方法不足以解决骨骼问题，这些问题在牙齿移动之前处理会更好。这个过程可以防止牙齿过度移动。这里报告的两例以牙列拥挤为主诉的病例，在正畸矫正之前，针对潜在的骨骼问题采用了早期正畸治疗方法。结果表明了该方法的有效性。
