Regression analysis to predict total space required from mandibular first permanent molar

Umar Hussain; Ali Ayub; Afeef Umar Zia; Faizan Ul Hassan; Syed Suleman Shah; Ghulam Rasool

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Regression analysis to predict total space required from mandibular first permanent molar

Author(s)

Umar Hussain Saidu College of Dentistry, Swat, Pakistan

Ali Ayub HBS Medical and Dental college, Islamabad, Pakistan.

Afeef Umar Zia Department of Orthodontics, Margalla institute of Health Sciences, Quaid-E-Azam Avenue Gulrez Phase 3, Rawalpindi, Pakistan

Faizan Ul Hassan Rehman College of Dentistry, Peshawar, Pakistan.

Syed Suleman Shah Khyber College of Dentistry, Peshawar, Pakistan.

Ghulam Rasool Rehman College of Dentistry, Peshawar, Pakistan.

Abstract

Introduction: Space analysis is an essential tool for treating crowded cases in Orthodontics. Accurate method for space analysis can help the clinician to obtain optimal results. Material and methods: The mesiodistal width of teeth was measured for 120 plaster models. The correlation between MW of mandibular first molar (Md-6) and total space required (TSR) in both jaws was assessed with Pearson correlation test. Regression equations for both genders and jaws between Md-6 and TSR were derived through linear regression. Independent samples t test was used for comparison of MW of Md-6 and TSR between genders for each jaw. Paired t test was applied for comparing the MW of predicted and actual TSR. Results: The mean MW of all 10 permanent teeth in mandible for males (68.30±4.41) was higher than females (66.44±3.337) statistically (P=.010). Correlation between MW of Md-6 and TSR were higher in females (maxillary arch r=0.84 and mandibular arch r=0.860) than males (maxillary arch r=0.79 and mandibular arch r=0.830). In mandible 69.2% of the variations in TSR can be explained due to MW of Md-6 in the model. Similarly, in maxilla 65% of the variations in TSR can be explained due to MW of Md-6 in the model. Regression equations were derived for both arches and genders using Md-6 as an explanatory variable and TSR as a dependent variable. Conclusions: Md-6 can be utilized as a predictor for TSR in both arches and genders.

Publication Details

Page(s) 32-37

DOI DOI not available

Published Journal: Pakistan Orthodontic Journal, Volume: 14, Issue: 1, Year: 2022

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Keywords

space analysis, Mesiodistal widths, regression equation, total space required, mandibular permanent first molar