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LONDON, June 27 (Xinhua) -- Brentford has made Keith Andrews the club's new head coach with the former Irish international agreeing a three-year deal at the club. 44-year-old Andrews joined ...
根据Andrews的六要素理论,下颌磨牙的最佳位置将在基骨中直立,其轴面(FA)点或牙冠中心将在距WALA嵴2mm的水平位置。 由此可以得出,下颌弓的宽度被定义为WALA到WALA的距离减去4mm。
Andrews口颌面协调六要素中的要素Ⅱ规定: 在上下牙弓满足要素Ⅰ的前提下,上颌中切牙的FA点落在GALL线上,且上下切牙有良好的咬合接触关系。 GALL线是如何定位的呢?