正畸治疗的限度与医师的知识,技能和积极的态度有直接关系。由于有关诊断和治疗因素的知识不足,机械能力的有限和继续不断的要求而使正畸治疗存在着一定的限度。Hixon和Klein最近指出: 1.正畸矫正器不能使面部永久地增加到有临床意义的效果量(1毫米)。2.当前还没有方法能预示个体的生长。 The limits of orthodontic treatment are directly related to the physician's knowledge, skills and positive attitude. Due to lack of knowledge about the diagnostic and therapeutic factors, limited mechanical capabilities and continuing demands, there is a limit to orthodontic treatment. Hixon and Klein recently pointed out: 1. Orthodontics can not permanently increase the face to a clinically significant amount of effect (1 mm). There is currently no way to predict individual growth.