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Abstract


INTERNATIONAL DENTAL JOURNAL OF STUDENTS RESEARCH - VOLUME 2 ISSUE 4, January 2015

Pages: 29-35

THE INTER-ARCH ANTERIOR TOOTH SIZE DISCREPANCY IN DIFFERENT MALOCCLUSION GROUPS

Author: Dr. Jamshaid Ali Imran1, 2, Dr. Ambreen Afzal3 Dr. Zeeshan Sheikh4, 5, 6 Dr. Sahar Jamshaid Ali7

Category: Case Report

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Abstract:

Objectives: The present study was aimed to investigate the correlation between anterior tooth size discrepancies and Angle’s class I, II, and III malocclusions and to assess their prevalence in the Pakistani population from the metropolitan city, Karachi.

Study design: A Cross sectional, comparative study.

Place and duration of study: Out-patient department (OPD) of Orthodontics division at Karachi Medical and Dental College. Six months.

Subjects and methodology: Total 90 subjects. (Angle’s class I: 30, Angle’s class II: 30 and Angle’s class III: 30) with an age range of 15-25 years were included n the study. Equal distribution of male and female subjects was maintained. The comparison of male and female subjects was done regardless of body height and weight. Non-probability, purposive type of sampling technique was done for data collection. The mesiodistal tooth width was measured from first molar to first molar on 90 mandibular and 90 maxillary plaster models with a vernier caliper. Analysis of variance was used to compare the mean Bolton anterior tooth size ratios as function of Angle classification and gender. Statistical differences were determined at the 95% Confidence level (P < 0.05).

RESULTS: When Comparing mean anterior ratio of class I (mean=79.8), class II (mean =79.9) and class III (mean =85) in 90 casts, significant difference were found among all three classification (P=0.008).The results showed that significant difference found in mean anterior ratio when comparing different malocclusion groups. Significant difference was found in females when comparing mean anterior ratio among males and females in class III malocclusion group. When multiple comparison was done of anterior ratios between malocclusion groups there was no significant difference found between class I and II while class III malocclusion group was significantly different from class I and class II (P=0.007).

Conclusions: Significant difference found in mean anterior ratio when comparing different malocclusion groups. Subjects with an Angle class III malocclusion had a significant greater probability of tooth size discrepancies than those with class I and class II malocclusions.

Keywords: Tooth size discrepancy; Bolton analysis; Bolton ratio; Tooth size analysis; malocclusion.

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