Correlation of the Iris Diameter with the Mesiodistal Width of Maxillary Central Incisor using Digital Image Analyzer: An Observational Study

Abstract

Aim: The purpose of this clinical study was to determine the correlation between the horizontal visible iris diameters with the mesiodistal width of the central incisor respectively in the Central India population aged between 18 and 26 years. Background: Can the Iris Diameter be correlated with the mesiodistal width of maxillary central incisor. If thus results obtained, the iris diameter can be used as a tool for the selection of maxillary anterior tooth in completely edentulous patients. Materials and Methods: Seventy Five Central Indian participants aged between 18 and 26 years participated in this study. Standardized digital photographs of the face generated from the frontal aspect were made using a digital camera. The measurements of the iris diameter and the mesiodistal width of the maxillary central incisor at the incisal edge, middle third, and cervical third were assessed with photoimaging software. The data obtained have undergone the statistical analysis by using the paired-sample t-test to compare the right and left sides, and independent-sample t-tests to compare between gender, and the Pearson correlation coefficient (r) to evaluate the relationship between variables. Results: A positive correlation between the horizontal visible iris diameter and the mesiodistal width of the maxillary central incisor was found in men and women. In men, the r = 0.276, 0.373, 0.378 (right side) and 282, 158, 429 (left side) respectively were found for cervical third, middle third, and incisal third region. In women, the r = 0.329, 0.415, 0.192 (right side) and 0.053, 0.469, 0.163 (left side) were found respectively in cervical third, middle third, and incisal region were found. Conclusions: The conclusion was that the horizontal visible iris diameter can be used as a reference point to estimate the mesiodistal width of the maxillary central incisor tooth.