Evaluation of Bolton's Ratio in Normal Occlusion and Different Types of Malocclusion in Iranian Population
Publish place: Iranian Journal of Orthodontics، Vol: 19، Issue: 1
Publish Year: 1403
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ORTHO-19-1_011
تاریخ نمایه سازی: 16 خرداد 1403
Abstract:
Background: The Bolton analysis is commonly used by orthodontists. The Bolton ratios of different populations are significantly different from the standard values of Bolton. This study sought to examine the Bolton's anterior and overall ratios in various malocclusion types in Mashhad, Iran, in contrast to the Bolton’s standards. Methods: This descriptive-analytical study was conducted on ۲۴۰ study models of patients (۱۲۱ males and ۱۱۹ females) in four groups (n= ۶۰ cases) of normal occlusion, Class I, Class II, and Class III. The mesiodistal dimensions of the teeth were measured twice using a digital caliper. The anterior and overall ratios of Bolton were calculated. Statistical analysis was conducted utilizing SPSS ۱۸.۰. Results: The mesiodistal width of the maxillary lateral incisors in normal occlusion cases was greater than that in Class I, Class II, and Class III malocclusions (P<۰.۰۵). Conversely, the mesiodistal width of the maxillary first and second premolars was the greatest in Class II and the smallest in Class III malocclusion (P<۰.۰۵). Correlation was not observed between dental ratios (anterior and overall) and gender or malocclusion groups (P>۰.۰۵). Furthermore, the anterior ratio was significantly higher than the Bolton's standard in Class I and III malocclusion groups (P<۰.۰۵). The normal occlusion group's overall ratio was significantly lower than the Bolton's original ratio (P<۰.۰۵). Conclusion: Implementing the Bolton analysis in the population of Mashhad, Iran should be approached with caution.
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Authors
Iman Parisay
Professor, Department of Pediatrics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Fatemeh Mazhari
Professor, Department of Pediatrics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Roozbeh Rashed
Orthodontist, Toronto, Canada
Minoo Zohouryan
Dentist, Department of Pediatrics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Bahareh Sanaee
Dentist, Department of Pediatrics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran