Munir Khan, Muhammad Afzal Khan, Umar Hussain.
Clinical crown length, width and the width/length ratio in the maxillary anterior region in a sample of Mardan population.
Pak Oral Dental J Jan ;35(4):738-41.

The objective of this study was to determine clinical crowns length, width and width/length ratios of the maxillary anterior teeth and to determine standard of ideal tooth dimensions. Crown length, width and width/length ratio was measured of 100 casts of patients. All of the 6 maxillary anterior teeth present, anatomically whole, without restorations that altered their dimensions, from which good diagnostic casts could be obtained, and where the anatomic elements were well defined were included in the study. The data were analyzed by using SPSS 20.0 version. Mean and standard deviation were calculated for numerical variables like age, tooth width, length and width/length ratio. Pearson correlation test was applied for symmetry of teeth sizes between left and right of arch. The sample composed of 50% males and 50% females with gender ratio 1:1. The mean age was 23±2.3 years. The mean crown length was 10.22 mm for right central incisor, 7.96 mm for right lateral incisor and 8.88 mm right canine. The left side teeth crown width was close to right side. The mean crown width was 7.99 mm for right central incisor, 7.96 mm for right lateral incisor and 8.28 mm right canine. The left side teeth crown length was nearly equal to right side crown width. The mean crown width/length ratio was 0.91 for right central incisor, 0.72 for right lateral incisor and 0.71 right canines. The left side teeth crown width/length was nearly equal to right side crown width. Interclass correlation was almost perfect and statistically significant. The tooth dimension showed less variation (low standard deviation value) for crown length, width, and width/length ratio; so it will help the clinician in restorative procedures.

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