Kornhauser S, Abed Y, Harari D, Becker A
Department of Orthodontics, Faculty of Dentistry, Hebrew University-Hadassah School of Dental Medicine, Jerusalem, Israel.
Am J Orthod Dentofacial Orthop. 1996 Nov;110(5):528-34. doi: 10.1016/s0889-5406(96)70061-6.
Palatally impacted canines can usually be mechanically drawn directly to the labial arch wire after they have been surgically exposed. Occasionally, the direct line between the impacted tooth and the arch wire is obstructed by the presence of the root of the lateral incisor, or the tooth is very superiorly displaced, which makes direct traction ill-advised and impractical. In this situation, it is recommended that the tooth be erupted vertically downward, through the palatal tissue on the palatal side of the dental arch, as a first stage and, only then moved buccally into its place in the arch. This article describes a method whereby an auxiliary spring is placed on the buccal side of the arch to produce the vertical and palatal traction needed. There are no palatal accessories, and the auxiliary is tied in, "piggy-back" fashion, over the main base arch, by using the multibracketed appliance already present.
腭侧阻生尖牙在外科暴露后通常可通过机械方式直接牵引至唇弓丝。偶尔,阻生牙与弓丝之间的直线会被侧切牙根阻挡,或者牙齿移位非常高,这使得直接牵引既不可取也不实际。在这种情况下,建议首先将牙齿垂直向下萌出,穿过牙弓腭侧的腭组织,然后再颊向移动到牙弓中的位置。本文介绍一种方法,即在牙弓颊侧放置一个辅助弹簧以产生所需的垂直和腭向牵引力。无需腭侧附件,通过使用已有的多托槽矫治器,将辅助弹簧以“背驮式”方式系在主基弓上。