Modified Hyrax expander for the correction of upper midline deviation: a case report.
Modified Hyrax expander for the correction of upper midline deviation: a case report.
复制标题
用于矫正上中线偏差的改良 Hyrax 扩张器：病例报告。
作者：
G. Farronato;L. Giannini;G. Galbiati;C. Maspero
本文描述了一份病例报告，该病例报告的患者接受了Farronato等人在2009年描述的改良版Hyrax快速腭部扩张器治疗。该装置可用于治疗混合牙列的患者，这些患者由于上颌骨发育不全和一些乳牙过早脱落，表现出恒牙移位，恒牙间隙减少或闭合，取代先前脱落的恒牙。该扩张器提供了一个前庭臂，用于矫正上颌骨不对称的横向差异。介绍了激活方法、治疗效果和临床优势。使用该矫治器可以恢复正确的上颌骨横径，重新获得空间，同时恢复中线的对称性达5-6 mm。此外，如病例报告所示，可以恢复牙弓长度。带前庭臂的扩弓器是一种阻断治疗，可以缩短固定矫治器的正畸治疗时间。
This article describes a case report of a patient treated by the modified version of the Hyrax rapid palatal expander described by Farronato et al. in 2009. This device can be utilized for the treatment of patients in mixed dentition who, due to the maxillary hypoplasia and to the premature exfoliation of some deciduous teeth, manifest a migration of the permanent incisors with a reduction or closure of the space for the permanent teeth substituting those previously exfoliated. This expander presents a vestibular arm for correcting maxillary asymmetric transverse discrepancies. The activation method, the therapeutic benefits as well as the clinical advantages are described. The use of this appliance allows to restore the correct transverse maxillary diameters, to regain space and at the same time to restore the symmetry of the midlines up to 5-6 mm. Moreover, a recovery of the arch length can be obtained, as demonstrated by the case report presented. The expander with vestibular arm represents an interceptive treatment which can reduce the duration of the orthodontic therapy with fixed appliances.