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咀嚼器官在完成功能时上、下颌骨闭合于正中(牙合)位的静止状态下,某些上颌与下颌相对应的牙齿切缘或(牙合)面分离无(牙合)接触时称为开(牙合)畸形。开(牙合)畸形的发病率在世界各地的口腔调查中为0.89～9.6%,发病率的大小随年龄、性别、地区和种族等因素而有变化。开(牙合)畸形对颜面的发育、健康和美观为害较大,开(牙合)牙完全丧失切割、撕裂和研磨等咀嚼功能,并影响
In the completion of the function of the chewing organ, the mandibular is closed in the middle of the occlusal position, some of the maxillary and mandibular corresponding to the dental incision or occlusal separation without (occlusal) contact is called Open (occlusion) deformity. The prevalence of open occlusion is 0.89 to 9.6% in oral surveys around the world, and the prevalence varies with age, gender, region and ethnicity. Occlusal deformity is more harmful to the development, health and aesthetics of face, and the occlusion teeth completely lose the chewing function such as cutting, tearing and grinding, and affect