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本文介绍一种利用修订后的Hixon-Oldfather预测图以及逐步填入法,对混合牙列的牙齿大小与牙弓长度关系进行了分析,预测牙齿大小与牙弓长度的不调,同时还讨论了在下颌牙弓间隙分析中需要考虑的一些因素。文章介绍的修订后的Hixon-Oldfather预测图见图。图中的横轴,表示下颌每侧已萌切牙的近远中宽度与根尖牙片上测得的未萌前磨牙宽度的总和。纵轴表示下颌未萌尖牙、前磨牙的预测宽度之和。斜线为回归直线。找出横轴上的下颌切牙及前磨牙测量总和的点,垂直向上与斜线相交,由交点向左
This article describes a revised Hixon-Oldfather predictive map and step-by-step fill in the mixed dentition teeth size and the relationship between the length of the dental arch was analyzed to predict the tooth size and length of the dental arch, and also discussed Some factors need to be considered in the analysis of mandibular arch space. The article introduces the revised Hixon-Oldfather forecast map shown in the figure. In the figure, the horizontal axis represents the sum of the mesial and distal widths of the incised teeth on each side of the mandible and the width of the non-premolar teeth measured on the apical teeth. The vertical axis represents the sum of the predicted widths of the mandibular unmovable canine and premolar. Slash for the regression line. Find the horizontal axis of the mandibular incisors and premolar measurement of the sum of the point, vertical and oblique intersection, from the intersection point to the left