Norms Establishment with Bolten Analysis for the Central Indian Population

Objective: To establish the norms for the Bolton analysis in Central India (male and female) population.

Materials and Methods: 125 study casts (62 males and 63 females) from 15 to 30 years were selected from the Department of Orthodontics. The mesio-distal dimension from right to left permanent molars of maxillary and mandibular teeth were measured with a digital calliper, to calculate, analyse and compare the Bolton ratio. Paired and unpaired T-test, z-value were used for the statistical analysis.

Results: The overall mean ratio for males and females were 88.42±6.01 and 88.85±4.03 and the anterior mean ratio for males and females were 77.83±6.42 and 78.88±5.13 respectively. There was a non-statistical difference in the anterior and overall mean within males and females. A statistically significant difference was found when Central Indian females were compared with Caucasian participants. In a comparison of the present study with other Indian populations, significant data was found with anterior and overall ratio but non-significant data was found for anterior ratio for the Telangana population.

Conclusion: It is suggested the population-specific norms are needed to plan treatment for orthodontics taking into consideration retention and stability.