ABSTRACT
Ideal interaction of dental and facial beauty proportions highly influences a harmonious facial appearance. Racial anatomical variations have been significantly noted and using these norms during prosthodontic rehabilitation will be greatly helpful in successful treatment outcome. Aim: The present study aims to correlate various facial landmarks (interpupillary distance [IPD], intercanthal width, bizygomatic width [BZW], and interalar width) with intercanine distance (ICaD) in Indian young adults to determine the mesiodistal width of the maxillary anterior teeth in edentulous patients. Setting and Design: This is an observational cross-sectional study. Materials and Methods: This study was conducted in 500 individuals ranging in age from 18 to 28 years. IPD, intercanthal width, BZW, and interalar width were measured with a digital caliper (accuracy - 0.01 mm). A “T-” shaped flat metal plate called “canine tip marker” was made to mark the tips of the maxillary canines, which were further measured with the digital caliper. The data were summarized in table form and were statistically analyzed. Statistical Analysis Used: Student's t-test and ANOVA test were used. Results: A significant correlation (P < 0.001) was found between these landmarks with ICaD, in which interalar width shows highest degree of correlation (r = 0.639). ANOVA test showed that maximum number of individuals had < 5% variability range between actual values and calculated values of ICaD for all extraoral facial landmarks except intercanthal width. Conclusion: Combination of various facial and oral factors should be considered while selecting artificial teeth. Regression equations obtained can be well used during teeth selection to achieve a significant result.
ABSTRACT
Los dientes son un excelente material de investigación en personas vivas y cadáveres, en el ámbito antropológico, genético, odontológico y forense, por sus características (dureza, resistencia al ataque químico, fuego y descomposición). El diente canino mandibular es el menos afectado por enfermedad periodontal, menos extraído, más resistente a traumas severos y el que presenta mayor dimorfismo sexual. Se puede usar para la estimación de sexo, calculando el Índice Mandibular Canino (IMC). El propósito de este estudio es determinar la certeza del IMC en la estimación de sexo respecto al ancho mesiodistal del canino. El estudio fue realizado en 150 sujetos (H:M= 65:85), entre 1824 años. El ancho mesiodistal del canino y la distancia canina fueron medidos en los modelos obtenidos y el IMC fue calculado. Se calculó la sensibilidad y especificidad para cada uno de los índices en cuestión. El IMC tuvo una sensibilidad del 33,85 % y una especificidad de 75,29 % en la estimación de sexo. El ancho mesiodistal del canino tuvo una sensibilidad de 66,15 % y una especificidad de 84,71 %. El ancho mesiodistal del canino tiene mayor sensibilidad y especificidad que el IMC en la estimación médicolegal de sexo.
Teeth are an excellent research material in living persons and in corpses, in the anthropological, genetic, dental and forensic fields, because of their characteristics (hardness, resistance to chemical attack, fire and decay). Mandibular canine teeth are the least affected by periodontal disease, the least extracted teeth, are more resistant to severe trauma and have a greater sexual dimorphism. They can be used for sex estimation, through the Mandibular Canine Index (MCI). The purpose of this study is to determine the accuracy of the MCI in sex estimation, compared to the mesiodistal canine width method. The study was conducted on 150 subjects (M:F= 65:85), aged 1824. The mesiodistal width of canine and the intercanine distance were measured on the obtained models, and the MCI was calculated. The sensitivity and specificity for each of the two indexes were also calculated. MCI had a sensitivity of 33.85% and a specificity of 75.29 % in sex estimation. The mesiodistal width of canine had a sensitivity of 66.15 % and a specificity of 84.71 %. The mesiodistal width of canine has a higher sensitivity and specificity than the MCI in the medicolegal estimation of sex.
Subject(s)
Humans , Male , Female , Adolescent , Young Adult , Bicuspid/pathology , Cuspid/pathology , Incisor/anatomy & histology , Tooth, Unerupted/pathology , ROC Curve , Sex Characteristics , Forensic Dentistry , Mandible/pathology , Molar/anatomy & histologyABSTRACT
Context: Gender determination is considered an important step in reconstructing the biological profile of unknown individuals from the forensic context. Assessment of sex differences from human remains will be of immense help as it would narrow down fields of search to 50 %. Aims: To evaluate the accuracy of various dental parameters used for the gender determination. Settings and Design: The aim of the present study was to investigate the accuracy of various methods employed in gender determination or personal identification such as mesiodistal width of molars, mesiodistal width of canine, mandibular and maxillary canine index in age group of 15 to 65 years. Methods and Material: A total of 200 patients were selected comprising of both the genders in the age group of 15-65 years belonging to various parts of Nagpur. The mesiodistal crown width of mandibular and maxillary permanent molar and canine teeth and the intercanine distance was measured and the values were noted. Statistical analysis used: the data was analysed using SPSS 18 software. Results: The mean of mesio distal width of maxillary and mandibular molar in males and females is suggestive of gender dimorphism in maxillary molars which was statistically significant. The maxillary inter-canine distance was greater in males and was statistically significant. Conclusions: The dental parameters can be used as a tool for accurate gender determination in forensic investigations.
ABSTRACT
Mandibular canines exhibit the greatest sexual dimorphism amongst all teeth. The present study was performed on 368 healthy MBBS students of Medical College, Bhavnagar (216 males, 152 females) of 18 – 24 years with the aim to investigate whether any correlation existed between odontometric measures including mandibular canine index, and sex determination in the year of 2006. Mean value of intercanine distance was higher in males than females and the difference was statistically highly significant (p value<0.01). Comparison of mean values of left and right mandibular canine widths exhibited lesser values in females. The variation in right and left mandibular canine width between males and females was highly significant (p value<0.01). The right and left mandibular canine index (MCI) among genders showed significant difference. Our study conclusively establishes the existence of a definite statistically significant sexual dimorphism in mandibular canines and MCI.
ABSTRACT
Mandibular canines exhibit the greatest sexual dimorphism amongst all teeth. The present study was performed on 400 healthy volunteers (200 males, 200 females) of 17 - 21 years with the aim to investigate whether any correlation existed between odontometric measures including mandibular canine index, and sex determination. Mean value of intercanine distance was higher in males than females and the difference was statistically highly significant (p value<0.01). Comparison of mean values of left and right mandibular canine widths exhibited lesser values in females. The variation in right and left mandibular canine width between males and females was highly significant (p value<0.01). The right and left mandibular canine index (MCI) among genders showed no significant difference. A mesio-distal canine width greater than 7.3 mm was suggestive of male sex. Our study conclusively establishes the existence of a definite statistically significant sexual dimorphism in mandibular canines and that MCI is of limited value.