Legović Mario, Novosel Andreja, Legović Asja
Department of Orthodontics, School of Dentistry, University of Rijeka, Croatia.
Angle Orthod. 2003 Jun;73(3):314-8. doi: 10.1043/0003-3219(2003)073<0314:REFDMC>2.0.CO;2.
In this study, regression equations (prediction equations) were established for the purpose of accurately predicting the widths of the crowns of unerupted canines (C) and premolars (P1 and P2) on the basis of the measured mesiodistal diameter (MDD) and vestibulooral diameter (VOD) of the crowns of the erupted central and lateral incisors (I1, I2) and first permanent molars (M1). On the plaster casts of 120 subjects (60 boys and 60 girls), MDD and VOD of the crowns of I1, I2, C, both P1 and P2, and M1 on both sides in both jaws were measured twice, with a time distance between measurements. Gradual regression equations were derived on the basis of the measurement results, by which the sums of the widths of crowns of C, P1, and P2 can be predicted using three to five predictors. The coefficients of multiple correlations regarding the sex and the jaw varied from 0.79 to 0.85.
在本研究中，建立了回归方程（预测方程），目的是基于已萌出的中切牙（I1、I2）、侧切牙和第一恒磨牙（M1）牙冠的测量近远中径（MDD）和前庭口直径（VOD），准确预测未萌出尖牙（C）和前磨牙（P1和P2）牙冠的宽度。在120名受试者（60名男孩和60名女孩）的石膏模型上，对双侧上下颌中I1、I2、C、双侧P1和P2以及M1牙冠的MDD和VOD进行了两次测量，两次测量之间有时间间隔。根据测量结果推导了逐步回归方程，利用三到五个预测变量可以预测C、P1和P2牙冠宽度之和。性别和颌骨的复相关系数在0.79至0.85之间。
