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安氏Ⅲ类错(牙合)分为骨骼型Ⅲ类;功能型Ⅲ类和前牙反(牙合)三型。骨骼型和功能型Ⅲ类错(牙合)不易鉴别。用传统诊断方法曾报告过骨骼型和功能型Ⅲ类下颌从休息位到正中(牙合)的旋转相似。各种理论论述了下颌张开运动的轴是向前方的。本研究的目的是区分替牙(牙合)期骨骼型和功能型Ⅲ类错(牙合)患者转动轴的部位。材料和方法:用头颅侧位X线片诊断Ⅲ类错(牙合)的正畸患者60人,男性30人,女性30
Class Ⅲ malocclusion (occlusion) is divided into skeletal type Ⅲ; functional type Ⅲ and anterior crossbite (occlusal) type III. Skeleton and functional type III error (occlusion) is not easy to identify. Traditional methods of diagnosis have reported similar skeletal and functional type III mandibular rotation from the resting position to the median occlusion. Various theories have discussed that the axis of mandibular opening movement is forward. The purpose of this study was to distinguish the rotational axis of skeletal and functional Class III malocclusion patients during occlusal occlusion. MATERIALS AND METHODS: Sixty orthodontic patients with type Ⅲ malocclusion diagnosed by cephalometric X-ray films, 30 males and 30 females