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ORIGINAL ARTICLE
Year : 2013  |  Volume : 2  |  Issue : 4  |  Page : 120-123

The relationship between mandibular arch length and widths in a sample of Yemeni subjects with normal dento-Skeletal relationship


Department of Orthodontics, Faculty of Dentistry, Sana'a University, Sana'a, Yemen

Correspondence Address:
Nabil Muhsen Al-Zubair
Department of Orthodontics, Faculty of Dentistry, Sana'a University, P. O. Box 85, Sana'a
Yemen
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2278-0203.123198

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Objective: To assess the relationship between mandibular arch length and widths in a sample of Yemeni subjects aged (18-25) years. Materials and Methods: The investigation involved clinical examination of (765) adults; only 214 (101 females, 113 males) out of the total sample were selected to fulfill the criteria for the study sample (normal dento-skeletal relationship). Study models were constructed and evaluated to measure mandibular arch dimensions. The Spearman's correlation coefficient (r) was calculated between the measurements of arch widths and lengths. Results: Overall, the male group demonstrated greater transverse and sagittal mandibular dimensions; However, this was only statistically significant for measurements of inter-first and second molar distances and anterior arch length (P < 0.05). Relatively stronger linear relationships were observed between the inter-canine distance and mandibular arch lengths (P < 0.05, Spearman's r ranged between 0.17 to 0.50). Conclusion: Among studied mandibular dimensions in subjects with normal dento-skeletal relationship, only the inter-canine distance demonstrated a week to moderate linear relationship with the mandibular arch lengths.


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