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Morphometric Evaluation of Nasolacrimal Canal in Indian Ethinics: A Cone Beam Computed Tomography Study

Akhilanand Chaurasia, Assistant Professor, Department of Oral Medicine & Radiology, Faculty of Dental Sciences, King George’s Medical Unniversity, Lucknow. , Akhilanand Chaurasia* , Gaurav Katheriya**

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Indian Journal of Dental Education 10(2):p 39-47, April - June 2017. | DOI: https://dx.doi.org/10.21088/ijde.0974.6099.10217.7

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Abstract

Objective: This study aims at age and sex related changes in mediolateral diameter,antero-posterior Diameter and length of nasolacrimal duct. The mathmetical equations derived from linear regression analysis on the basis of mediolateral diameter,antero-posterior diameter and length of nasolacrimal duct is used in determination of age of study subjects however sex of study subjects can be predicted on the basis of length of nasolacrimal duct by discriminant function analysis using Fischer’s exact test. Material and Methods: The CBCT images of 216 study subjects were analysed prospectively. All the CBCT images are obtained at 90 Kvp, 4 mA for 11.3 seconds at FOV (17"x13.5") voxel size of 300. The mediolateral diameter, anteroposterior diameter and length of nasolacrimal duct are measured by using Trophy Dicom Ink software programme on axial and mid-sagittal images (DICOM images). Results: The study population consists of 216 study subjects aged between 10 and 84 years with a mean age of 34.28±17.357 years.The t test showed that the length of nasolacrimal duct is statistically significantly (p<0.001). The mean of length of nasolacrimal duct is slightly higher in males than females. The mean of length of nasolacrimal duct is slightly higher in males than females. The mediolateral diameter, length of nasolacrimal duct, antero-posterior diameter were not significant (p>0.05) in the age groups. Conclusion: The age and sex issues in medico-legal cases and forensic anthropology can be resolved by measurements of nasopalatine duct.

 

Keywords: Nasopalatine Duct; Cone Beam Computed Tomography; Maxilla

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DOI: https://dx.doi.org/10.21088/ijde.0974.6099.10217.7

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