Henry R J
University of Texas Health Science Center at San Antonio 78284.
ASDC J Dent Child. 1993 Nov-Dec;60(4):408-13.
The maxillary quad-helix appliance is a commonly used approach for treatment of maxillary arch constriction and/or posterior crossbite. Concern over excessive force generation during rapid maxillary expansion led to its development and use in growing children. The purpose of this article is to present the clinical application and therapeutic considerations regarding use of the quad-helix appliance in the slow maxillary expansion of mixed dentition cases. Considerable evidence is presented supporting such early expansion and factors for case selection are identified when considering this a treatment option.
上颌四螺旋矫治器是治疗上颌牙弓缩窄和/或后牙反合的常用方法。由于担心快速上颌扩弓过程中产生过大力量，该矫治器应运而生并应用于正在生长发育的儿童。本文旨在介绍四螺旋矫治器在混合牙列期上颌慢速扩弓中的临床应用及治疗注意事项。文中提供了大量证据支持早期扩弓，并确定了将其作为治疗选择时的病例选择因素。
