2008 年 17 巻 2 号 p. 55-62
The Bolton’s analysis and Pont’s analysis are very useful calculations for orthodontic diagnosis. In Nepal, there is no study about Bolton’s and Pont’s analysis. So here we examined 100 Nepalese subjects all subjects were with molar and canine class I relationship. We have measured the model to establish a normative standard of Bolton’s OR and AR for Nepalese population and to find the reliability of Pont’s index for Nepalese, and to comparing them between Caucasian and Chinese. The normative value on OR of Nepalese was found to be 91.22% with a standard deviation of 1.99 and AR was 78.04% with standard deviation of 2.72. The normative standard of OR for Nepalese is similar to that obtained by Bolton for Caucasian and that of Chinese, but the normative standard of AR obtained for Nepalese is significantly different than that obtained by Bolton for Caucasian and also that of Chinese. The correlation coefficient between the measured arch width values and the corresponding calculated values according to Pont’s indexes were low in all cases with r values ranging from 0.07 to 0.29. Pont’s Index is not reliable for predetermination of ideal arch width values for Nepalese.
