Field of Developmental Medicine, Health Research Course, Department of Orthodontics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
Am J Orthod Dentofacial Orthop. 2013 Sep;144(3):430-40. doi: 10.1016/j.ajodo.2012.08.032.
This report describes the treatment of a 20-year-old woman with a dental midline deviation and 7 congenitally missing premolars. She had retained a maxillary right deciduous canine and 4 deciduous second molars, and she had an impacted maxillary right third molar. The maxillary right deciduous second molar was extracted, and the space was nearly closed by mesial movement of the maxillary right molars using an edgewise appliance and a miniscrew for absolute anchorage. The miniscrew was removed, and the extraction space of the maxillary right deciduous canine was closed, correcting the dental midline deviation. After the mesial movement of the maxillary right molars, the impacted right third molar was aligned. To prevent root resorption, the retained left deciduous second molars were not aligned by the edgewise appliance. The occlusal contact area and the maximum occlusal force increased over the 2 years of retention. The miniscrew was useful for absolute anchorage for unilateral mesial movement of the maxillary molars and for the creation of eruption space and alignment of the impacted third molar in a patient with oligodontia.
本报告介绍了一位 20 岁女性的治疗情况，她存在牙中线偏斜和 7 颗先天缺失的前磨牙。她保留了右上颌乳尖牙和 4 颗乳第二磨牙，并且有一颗上颌右侧第三磨牙阻生。右上颌乳第二磨牙被拔除，通过方丝弓矫治器和微螺钉绝对支抗，使上颌右侧磨牙向近中移动，几乎关闭了间隙。微螺钉被移除，上颌右侧乳尖牙的拔牙间隙被关闭，纠正了牙中线偏斜。上颌右侧磨牙近中移动后，将阻生的右侧第三磨牙排列整齐。为了防止牙根吸收，方丝弓矫治器没有将左侧保留的乳第二磨牙向近中移动。在 2 年的保持期间，咬合接触面积和最大咬合力增加。微螺钉对于上颌磨牙单侧近中移动的绝对支抗、为萌出空间的创造以及在少牙症患者中阻生第三磨牙的排列非常有用。
