Abstract

Background: To evaluate the relationship between the overjet with pre and post orthodontic treatmentBolton’s analysis and with Peck & Peck index. Materials and Methods: Pre and post-treatment orthodontic study models (n=30) of patients in the age range of 18 to 35 years, who underwent orthodontic treatment were evaluated for overjet, Bolton’s analysis (overall ratio & anterior ratio) and Peck & Peck index (in 31,32,41&42). A digital Vernier caliper was used for all the measurements. The collected data was analyzed in SPSS software using appropriate statistical tests based on normality to compare the pre- and post-treatment mean values and Pearson’s correlation was done between the Bolton’s analysis and Peck & Peck index with overjet. The p value <0.05 was considered as statistically significant. Results: The Pearson’s correlation revealed an inverse correlation between Bolton’s anterior ratio and overjet (pre:-0.226, post:-0.254). The pre-treatment overjet with Peck & Peck index revealed an inverse correlation in PP 31 (-0.230) and positive correlation in other teeth. The correlation in the post-treatment overjet with Peck & Peck index was an inverse correlation in all teeth (-0.347; -0.184; -0.184 & -0.074 in PP31, PP32, PP41 & PP42 respectively).

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