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目的:比较微型种植体治疗成人骨性上颌前突时作为强支抗发生的牙颌变化。方法:微型种植体支抗组25例,收集患者治疗前后的头颅侧位定位片,通过X线头影测量比较治疗前后的上下颌骨及上下颌牙齿的各角度、线距的变化。结果:上颌磨牙前移0.84mm,前牙后移7.68mm,上下颌前牙轴倾度均减小10°,获得较好的矫治效果。结论:微型种植体作为支抗能有效控制前后牙的移动,明显改善面型。
OBJECTIVE: To compare the changes of dental structures of patients who underwent micro-implants in the treatment of adult bony maxillary protrusion. METHODS: Twenty-five mini-implants were collected. The cephalometric images of the cranial and posterior cranial nerves were collected before and after treatment. The angles and line-distance of the upper and lower jaws before and after treatment were compared by X-ray. Results: The maxillary molars moved forward 0.84mm and the anterior teeth moved 7.68mm. The axial inclinations of both anterior and mandibular teeth were both reduced by 10 °, and a good correction effect was obtained. Conclusion: Micro-implants can effectively control the movement of anterior and posterior teeth as a supporter, and improve the surface type obviously.