论文部分内容阅读
早在1800年就已报告,可使用向后的力来减少下颌前突,法国Cellier及美国Fox,Kingsley,Farrar等设计的矫正器均类似于今天的颏兜。当时矫正下颌前突常有失败,其原因是(一)矫正器为影响下颌髁突而施的力量太弱、(二)治疗往往在面部骨骼生长完成后才开始,而不能使下颌在颅面关系中向后,(三)早期用颏兜矫正器的失败是因正畸医师倾向于用口内颌间牵引矫正器来矫治Ⅲ类错(牙合)。这样使临床医生对Ⅲ类骨骼性错(牙合),只矫正了牙齿,而有时可因牙齿
As early as 1800, it has been reported that backward force can be used to reduce mandibular protrusion. The designed appliances such as Cellier in France and Fox in America, Kingsley and Farrar are similar to today's chinchillas. At that time, correction of mandibular prognosis often failed, the reason is that (a) the appliance to affect the mandibular condyle and the imposition of force is too weak, (b) the treatment is often the facial bone growth is completed, and can not make the mandibular craniofacial (3) The failure of early use of chinoura orthosis is because orthodontists tend to correct type III malocclusion by using intermaxillary traction appliance. This allows clinicians for Class Ⅲ skeletal malocclusion, only correct the teeth, and sometimes due to teeth