无牙颌正中关系位的哥特式弓描记与转移

摘要

目前一般认为确定无牙颌水平关系即确定正中关系位,哥特式弓描记法是唯一在确定关系时可客观观察下颌后退程度的方法.它利用固定于上下颌弓上的装置记录下颌运动时的信息,描记出雨伞状的划痕,雨伞顶点即被认为是正中关系位点.本文详细介绍了利用哥特式弓描记法记录与转移正中关系位的临床规范操作方法,主要内容包括安装描记盘、固定描记针、口内描记、记录正中关系位和转移至(牙)架等操作,每一步操作都通过相应的临床图片进行详细说明.%The present accepted definition of horizontal relation for edentulous arches is based upon the relationship of centric relation. The Gothic arch tracing is the only visual device for ascertaining the horizontal relationship of mandibular positions and two dimensional movements. A tracing of mandibular movements made by means of a device attached to the opposing arches; its shape resembles that of an um-brella head or a Gothic arch, and when the instruments marking point ia at the apex of the arch, the jaws are considered to be in centric relation. This article introduces the detailed information and illustrates in meticulous detail with high quality photographs the clinical steps of Gothic arch tracing process, such as the setting tracing plate and needle. The intraoral tracing and the transfer to articulator are described.