Inter-arch tooth size discrepancy for Sulaimani population with class II malocclusion

الملخص EN

Background The present study aimed to investigate the correlation between anterior and overall tooth size discrepancies for Class II (division 1 and division 2) malocclusion in Sulaimani population, assessing the mesiodistal width of 12 permanent teeth upper and lower from right first permanentmolar to the other and explore the possible significant gender differences.

Materials and Methods The sample was collected from patient attending orthodontic clinic in the college of dentistry, Sulaimani University aged 14 – 25 years old, the materials consisted of stone casts of the dentition of 53 pateints (males and females) , 30 of them class II division 1 ( 15 male and 15 female) and the remaining 23 casts were class II division 2 ( 12 male , 11 female) who presented with complete eruption of permanent mandibular incisors, canines, premolars and first molars , as well as maxillary canines , premolars and first molars.

Results The overall and anterior ratios were consistently larger in males than in females but statistically non significant also there were no significant differences in comparison between class II div.

1 and class II div.

2 concerning both overall and anterior ratios.

Conclusion Intermaxillary tooth size ratios may vary in different malocclusion types and may, to some degree, contribute to the severity of a malocclusion and an appropriate relationship of the mesiodistal widths of the maxillary and mandibular teeth favors optimal post-treatment results.

So these results improved that the Bolton analysis is important and should be considered when diagnosing, planning, and predicting prognosis in clinical orthodontics