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.

Many model analyses methods for measuring tooth size discrepancies, even though they are not always used have been carried out by many authors and formulated for the predetermination of arch size. On the basis of their findings many studies were carried out to find out its reliability, few researchers agreed to the statement made and few pointed out their lack of agreement. Bolton's method of diagnosing tooth-size discrepancy has been widely used in scientific studies since its publication. Cast analysis is required for all potential orthodontic patients, whether problems are moderate or severe. It is done to evaluate symmetry, alignment (crowding, spacing) and tooth size analysis. His study was done on a French population, the sample size and selection criteria were not described. Pont's analysis Diagnostic records for orthodontic purposeDiagnostic records have been categorized into 3 types 3). Records for intraoral evaluation(1) Intraoral photograph are commonly taken to record any hard and soft tissue lesions.(2) Panaromic intraoral radiograph are taken to see any pathologic lesion, supernumerary or impacted tooth.(3) Bite wing radiographs especially for children and adolescent to evaluate interproximal caries, and for adult to see the periodontal condition.(4) Transcranial and Laminagraphic TMJ films are taken for patients having symptoms of dysfunction.