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首页> 外文期刊>Oral and maxillofacial surgery >Maxillary molar intrusion with zygomatic anchorage in open bite treatment: lateral and oblique cephalometric evaluation
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Maxillary molar intrusion with zygomatic anchorage in open bite treatment: lateral and oblique cephalometric evaluation

机译：开放咬合治疗中颧骨锚固的上颌磨牙侵入：侧向和斜头测量评估

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Purpose We aimed to use lateral and oblique radiographs to evaluate dental and skeletal changes arising from maxillary molar intrusion with zygomatic anchorage in open bite patients. Methods We conducted a pilot study including nine patients (six females and three males; mean age, 18.7±5.1 years) with skeletal open bite treated with titanium miniplates for posterior dentoalveolar intrusion. Lateral and oblique (right and left, 45°) radiographs were obtained before (T1) and 6 months after intrusion (T2). A paired t test was used for statistical evaluation. Results The maxillary posterior teeth were intruded 2.03 ± 0.87 mm (p<0.01) with 450xg of force, which resulted in counterclockwise rotation of the mandible (1.57°,p=0.02) and clockwise rotation of the occlusal plane (4.27±2.66°, p=0.01). Anterior facial height decreased by a mean of 1.79±1.51 mm (p<0.0l). No significant change in the palatal plane or in anteroposterior molar movement was observed. Conclusion The oblique radiograph at 45° was useful for the assessment of molar intrusion and anteroposterior displacement. The treatment of anterior open bite with skeletal anchorage provided intrusion of molars and counterclockwise rotation of the mandible, resulting in open bite closure.
机译：目的 采用侧位和斜位X线片评估开放性咬合患者上颌磨牙侵入颧骨锚固引起的牙齿和骨骼变化。方法 我们进行了一项初步研究，包括9例患者（6例女性和3例男性，平均年龄18.7±5.1岁），用钛迷你钢板治疗后牙槽浸润的骨骼开放咬合。在侵入前 （T1） 和侵入后 6 个月 （T2） 获得侧向和斜向（左右，45°）X 线照片。采用配对t检验进行统计学评价。结果 上颌后牙侵入2.03±0.87 mm（p<0.01），力450xg，导致下颌骨逆时针旋转（1.57°，p=0.02），咬合面顺时针旋转（4.27±2.66°，p=0.01）。面部前部高度平均下降 1.79±1.51 毫米（p<0.0l）。未观察到腭平面或前后磨牙运动的显着变化。结论 45°斜X线片对葡萄胎侵入和前后位移的评估具有一定的用法。用骨骼锚固治疗前开放性咬合提供了臼齿的侵入和下颌骨的逆时针旋转，导致开放性咬合闭合。

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