Evaluation of Tooth Size and Dental Arch Ratio in Bengali Population Sample

In order to maintain the proper relationship between upper and lower arch, Bolton proposed anterior ratio and overall ratio. Objective: To evaluate and compare the tooth size and arch size discrepancies between normal cases and Class I crowded cases of the Bengali population. To determine Bolton’s overall ratio and anterior ratio in the normal sample , and to identify the possible variation in tooth-arch size ratio in subjects in Bengali population. Materials & Method: A total of 60 maxillary and mandibular pretreatment dental study casts were taken and divided into control group and study group. The descriptive statistics in respect of Bolton’s anterior ratio and overall ratio were calculated. The t-test was done for the statistical difference between the two mean values. Result: Bolton’s ratios in Bengali population sample values were found to be similar to the original data of Caucasian population. Females showed a tendency of smaller teeth than the males. Conclusion: Bolton’s ratios could be consistent to use in the orthodontic diagnosis of Bengali population. It supports the concept that females showed smaller teeth than the males.