THE RELATIONSHIP BETWEEN MANDIBULAR ARCH LENGTH AND WIDTH
DOI:
https://doi.org/10.33279/jkcd.v5i02.239Keywords:
Arch width, Arch length, Inter canine width, Inter molar widthAbstract
Objective: To determine the relationship between mandibular arch length and widths in a sample of Peshawar population.
Material and Methods: A total of 92 casts were selected from the Department of Orthodontics. The intercanine, inter-first molar, and mandibular arch length were measured on casts. All statistical analyses were performed using SPSS 16 software (SPSS Inc., Chicago, Ill, USA). Descriptive statistics were performed for the calculation of the mean, standard deviation, minimum, maximum, and range. The t-test was applied to test the level of significance between the mean for males and females for all mandibular arch dimension. The Spearman’s correlation coeficient (r) was also calculated between the measurement of arch widths and lengths in female and males. Statistical significance was predetermined at the 95% level at (P < 0.05).
Results: Out of 92 patients, 50% were males and 50% were females. The age ranged from 14 to 30 years with mean age of 15±2.1 years. The mean value for Intercanine, Inter-First molar distance, Total arch length was 26.3, 45.3, and 37.7. Intermolar distances were greater than intercanine distances; proving tapered arch form. Gender wise comparison showed that intermolar distance was statistically significantly different having p-value less than 0.05. Differences for intercanine and arch length were not significant statistically with a p-value higher than critical value.The correlation coefficient for intercanine and mandibular arch length was higher in females (0.6) than males (0.44). The correlation coefficients for intermolar and mandibular arch length were nearly equal in females (0.28) and males (0.2).
Conclusions: Tapered ach form in mandible is common in this sample of Peshawar population. A weak correlation exists between arch length and width in mandible.
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Copyright (c) 2015 Ghulam Rasool, Umar Hussain, TasneemAlam, Ahsan Mahmood
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