Davis H D, Usiskin L A
Br J Orthod. 1981 Jan;8(1):23-30. doi: 10.1179/bjo.8.1.23.
Retraction of canines with control of tooth inclination is described, using the direct application of extra-oral traction. the technique requires a modified facebow to be inserted into buccal tubes on canine bands; no archwires or springs are involved. In the upper arch the facebow is connected to a standard variable pull headgear, while a supported cervical strap is required for the lower canines. Preliminary investigations are outlined and the procedure is illustrated by some clinical cases from a pilot feasibility study.
本文描述了通过直接应用口外牵引来内收尖牙并控制牙齿倾斜度的方法。该技术需要将改良的面弓插入尖牙带环的颊管中;无需使用弓丝或弹簧。在上颌弓中,面弓连接到标准的可变拉力头帽,而下颌尖牙则需要使用支撑式颈带。文中概述了初步研究,并通过一项初步可行性研究中的一些临床病例说明了该操作过程。