Sumit Kumar Yadav

Agenesis of permanent canines: Rare case report

Agenesis of permanent canines is a rare condition, and that of both maxillary and mandibular permanent canines is extremely rare. It may occur either isolated or in association with other dental anomalies. Reports of such cases are very scarce in the literature. Need for early diagnosis of such conditions should be emphasized because of functional, esthetic, and psychological problems which should be evaluated and treated appropriately. The present paper presents a report of bilaterally missing permanent maxillary and mandibular canines. This case might contribute in the future studies of incidence of agenesis of permanent canines.

An Odontometric Approach for Estimation of Stature in Indians: Cross- Sectional Analysis.

INTRODUCTION Height/stature is one of the useful anthropometric parameter for individual identification. Correlation of stature to long bones, even fragmentary bones is frequently reported among various populations. As teeth have the advantage of being composed largely of hard tissue which is relatively indestructible, the careful study of these can enable reliable determination of stature of the person in life. AIM The present study was designed to elucidate the anthropometric correlation of tooth dimensions with stature and also devises regression formulae. MATERIALS AND METHODS This study was carried out on 361 Indian students (151 males and 210 females) in the age range of 21- 45 years to estimate stature using odontometry. Stature and tooth measurements were taken on each partcipant following standard methods and techniques. Karl Pearsons correlation co-efficient and linear regression was used to estimate stature. RESULTS Regression analysis showed that the canine width can aid in estimation of stature as an adjunct when only teeth are available for identification. CONCLUSION Tooth dimensions can be used only as a supplementary approach for the estimation of stature but with caution.

Correlation of Beta Angle with Antero- Posterior Dysplasia Indicators and FMA: An Institution Based Cephalometric Study

INTRODUCTION Beta angle utilizes three skeletal landmarks - point A, point B, and point C (the apparent axis of the condyle). It is formed between A-B line and point A perpendicular to C-B line. Further this angle indicates the severity and the type of skeletal dysplasia in the sagittal dimension and it changes with the growth pattern of the patient. Hence, it is important to study the dependence of beta angle on the growth pattern. AIM The present study was designed to evaluate the correlation of Beta angle with point A-Nasion-point B (ANB) angle, points A and B to palatal plane (App-Bpp), Wits appraisal and Maxillary-Mandibular plane angle Bisector (MMB) and Frankfort-Mandibular plane Angle (FMA) in Skeletal Class I, Class II and Class III malocclusion groups. MATERIALS AND METHODS Pre-treatment lateral head cephalo-grams of 120 subjects in age group of 15-25 years were obtained. Three skeletal Class I, Class II and Class III malocclusion groups (40 each) were assorted on the basis of ANB, MMB, App-Bpp, Wits appraisal and FMA. Analysis of variance (ANOVA) and mean differences were calculated to compare the study groups. Bivariate correlations among different parameters of these groups were obtained. RESULTS Normal values of beta angle in skeletal Class I group, skeletal Class II group and skeletal Class III group was 31.33±3.25, 25.28±4.28 and 40.93±4.55 respectively. Overall beta angle showed a strong correlation with all parameters of anterio-posterior dysplasia indicators except FMA. CONCLUSION Beta angle shows weak correlation with FMA and is not affected by growth pattern/jaw rotation. The normal values are in same range irrespective of the differences in craniofacial morphology.

A Contemporary Approach to Classify Ghost Cells Comprising Oral Lesions.

Ghost cells are swollen eosinophilic epithelial cells that have lost their nuclei but retain the cellular and nuclear outline. Pathologic ghost cell formation could be the process of aberrant keratinization or the result of coagulative necrosis. Ghost cells have been described in several odontogenic lesions, which include calcifying epithelial odontogenic cysts or tumours like odontomas, ameloblastic fibro-odontomas, and ameloblastomas. This article present a view on the formation of ghost cells with proposal/introduction of a classification for ghost cell lesions of the oral cavity in an attempt to organize these lesions for the better understanding and academic purpose.

Sex assessment efficacy of permanent maxillary first molar cusp dimensions in Indians.

Background: The human first maxillary molar provides clues about evolution and is functionally important. It has four main cusps, and each cusp has an independent growth pattern and different evolutionary background. Though less explored, the analysis based on measurement of each cusp appears to be more meaningful biologically than conventional measurements of the whole crown. Aim: This study aimed to demonstrate the extent of sexual dimorphism in permanent maxillary first molar cusp diameters and their potential utility in sex prediction among Indians using logistic regression analysis (LRA). Materials and Methods: The mesiodistal and buccolingual (BL) crown diameters along with cusp dimensions and cusp indices of right maxillary first molar were measured in an Indian sample (149 males, 151 females; age range of 18–30 years). The possible sex dimorphism in these parameters was evaluated, and LRA was performed to ascertain their usefulness in sex prediction. Results: BL crown dimension and the hypocone (distolingual) cusp showed the highest sexual dimorphism. The combination of metacone and hypocone, i.e., distal cusp diameters among cusp parameters showed the highest accuracy (61.3%). While, on combining all the crown and cusp diameters together the overall accuracy was raised (64.3%). Conclusion: This study supports the ontogeny hypothesis suggesting that early-forming mesial cusps demonstrate less sexual variation as compared to subsequently formed distal cusps in the maxillary molar. Though the sex identification accuracy for cusp diameters of the permanent maxillary first molar in Indians is relatively moderate (≈61%), it can be used as an adjunct for sexing of adult Indians in forensic contexts.