Frequency and variability of five non metric dental crown traits in the permanent maxillary dentitions of a racially mixed population from Bengaluru, Karnataka

The purpose of this study was to determinethe prevalence and variability of five non-metric dentalcrown traits (Carabelli cusp, protostylid, groove pattern,and cusps 6 and 7) in the deciduous (Um2 and Lm2)and permanent (UM1 and LM1) teeth in children inthe mixed-dentition, and to compare these frequencieswith the literature. A descriptive study was conductedto characterize the dental morphology of young subjectsin mixed dentition stages. The Arizona State UniversityDental Anthropology System (ASUDAS) and Grine,Sciulli, and Hanihara methods were used as referenceto compare the prevalence of dental traits in dentalcasts from 100 subjects from a Colombian racially mixedpopulation. The high prevalence of furrows and pits ofthe Carabelli cusp, minor expressions of the protostylid(foramen cecum), and the low frequencies of cusps 5 and6, plus the behavior of the expression of groove patterncollectively suggest that this group reflects influences byboth the Mongoloid and Caucasoid dental complexes.Correspondence of trait expression in both the primaryand permanent dentition was also demonstrated (P< 0.05). Some of the non-metric trait frequencies alsoexhibited sexual dimorphism.

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Variation in Dental Crown Morphology in Malaysian Populations

Dental Anthropology Journal ◽

10.26575/daj.v19i2.120 ◽

2018 ◽

Vol 19 (2) ◽

pp. 49-60 ◽

Cited By ~ 6

Author(s):

Mohd Fadhli Khamis ◽

Jane A. Taylor ◽

Abdul Rani Samsudin ◽

Grant C. Townsend

Keyword(s):

The Other ◽

Chi Square ◽

Distance Analysis ◽

Crown Morphology ◽

The Mean ◽

Chi Square Analysis ◽

Dental Traits ◽

Main Population ◽

Crown Traits ◽

Dental Crown

Dental crown variation was studied inthe four main population groups living in Malaysiausing dental casts (upper and lower) obtained from 790individuals. The aims of the study were to characterizevariation in 13 dental crown traits, within groups as wellas between groups, and to assess affinities between thegroups based on frequencies of occurrence of dentalfeatures. Using chi-square analysis and Fisher’s exacttest, the majority of dental traits were found to bebilaterally symmetrical and to demonstrate low sexualdimorphism. Comparisons of trait frequencies betweengroups revealed similarities between Malays, Jahai(Negritos) and Chinese who conformed to MongoloidSinodont-Sundadont dental patterns, whereas theIndians conformed to an Indo-European pattern.Phenetic distance analysis, using the mean measureof divergence, showed that Indians were markedlyseparated from the other three groups, while Malayswere closer to Jahai than to Chinese. These findingsbased on dental traits are consistent with historicalexplanations of affinities between modern Malaysianpopulations.

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Letter to Editor: Comment on“Incidence and Prevalence of Primary Hyperparathyroidism in a Racially Mixed Population” by Yeh M.W., Ituarte P.H., Zhou H.C., Nishimoto S., Liu I.L., Harari A., Haigh P.I., Adams A.L.

The Journal of Clinical Endocrinology & Metabolism ◽

10.1210/jc.2016-1162 ◽

2016 ◽

Vol 101 (4) ◽

pp. L52-L53

Author(s):

Declan T. Waugh

Keyword(s):

Primary Hyperparathyroidism ◽

Mixed Population ◽

Editor Comment ◽

Racially Mixed

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Prenatal diagnosis and elective termination of Down syndrome in a racially mixed population in Hawaii, 1987-1996

Prenatal Diagnosis ◽

10.1002/(sici)1097-0223(199902)19:2<136::aid-pd479>3.0.co;2-z ◽

1999 ◽

Vol 19 (2) ◽

pp. 136-141 ◽

Cited By ~ 25

Author(s):

Mathias B. Forrester ◽

Ruth D. Merz

Keyword(s):

Down Syndrome ◽

Prenatal Diagnosis ◽

Mixed Population ◽

Racially Mixed ◽

Elective Termination

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Estimating fetal age using multiple parameters: A prospective evaluation in a racially mixed population

American Journal of Obstetrics and Gynecology ◽

10.1016/0002-9378(87)90365-6 ◽

1987 ◽

Vol 156 (4) ◽

pp. 955-957 ◽

Cited By ~ 49

Author(s):

Frank P. Hadlock ◽

Ronald B. Harrist ◽

Yogesh P. Shah ◽

David E. King ◽

Seung K. Park ◽

...

Keyword(s):

Mixed Population ◽

Prospective Evaluation ◽

Multiple Parameters ◽

Racially Mixed

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Mixed dentition Morphology characteristics: a correlation between 3 non-metric dental traits in temporal and permanent dentition in scholars from Cali - Colombia

Revista Estomatología ◽

10.25100/re.v15i2.5613 ◽

2017 ◽

Vol 15 (2) ◽

Author(s):

Luisa Aguirre ◽

Diana Castillo ◽

Diana Solarte ◽

Martha Moyano ◽

Freddy Moreno

Keyword(s):

Bilateral Symmetry ◽

Permanent Dentition ◽

Mixed Dentition ◽

Dental Morphology ◽

State University ◽

Arizona State University ◽

Dental Anthropology ◽

Dental Traits ◽

Crown Traits ◽

Dental Crown

Summary: Objectives: Determine the correlation of the frequency and variability of three Non-metricdental crown traits (Carabelli cusp, protostylid and molar pattern cusp) between deciduous (um2/lm2)and permanent (UM1/LM1) teeth in mixed-dentition subjects. Materials and methods: A descriptivestudy was conducted to determine the dental morphology in mixed dentition stage of young subjects.The Arizona State University Dental Anthropology System ASUDAS and Grind and Sciulli Methods wereused as reference to compare frequency of dental traits in dental casts of 100 young individualsracially mixed. Results: A high expression of furrows and pits of the Carabelli cusp, a highfrequency of protostylid in degree 1 (foramen secum) and a expression of molar pattern cusp,revealed that the studied population received influences of the Mongoloid and Caucasoid dentalcomplexes. Correspondence on the traits expression among temporal and permanent dentition was alsoconfirmed. Bilateral symmetry and sexual dimorphism in the analyzed non-metric dental crown traitswere found. Key words: Dental anthropology. Dental morphology. Non-metric dental crown traits. Mixeddentition.

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Analysis of palatal rugae in young persons to two colombian ethnic groups

Revista Estomatología ◽

10.25100/re.v17i2.5696 ◽

2017 ◽

Vol 17 (2) ◽

Author(s):

Johan Jurado ◽

José Martínez ◽

Ricardo Quenguán ◽

Carlos Humberto Martínez Cajas ◽

Freddy Moreno

Keyword(s):

Sexual Dimorphism ◽

Ethnic Groups ◽

High Frequency ◽

Low Frequency ◽

Bilateral Symmetry ◽

Mixed Population ◽

Forensic Identification ◽

Forensic Sciences ◽

Palatal Rugae ◽

Racially Mixed

Summary Objective: This study analyzes the frequency of palatal rugae on young scholars of two Colombian populations. Besides determines the variability, the sexual dimorphism and the bilateral symmetry of the palatal rugae. Materials and Methods: A descriptive study analyzes palatal rugae through Trobo’s method in 208 dental casts chosen by convenience, 112 of Cali racially mixed population (46 females and 66 males) with ages between the 10 and 18 years old; and 96 of Colombian Amazons natives (53 females and 43 males) with ages between the 5 and 12 years old. Results: The line, wavy and curve palatal rugae features showed high frequency in both sexes and in ethnic groups. The forms angle and circle showed low frequency. Sexual dimorph and bilateral symmetry were not evidenced. Differences between the distribution of the primary and derivatives palatal rugae according to the ethnic group were also not evident. Conclusions: According to the frequency, shape and disposition of primary and derived palatal rugae, they do not evidence sexual dimorphism and bilateral symmetry. Line, sinuous and curve were the most frequent shapes, for primary and derived rugae. There were no identical rugograms between subjects, which conferes to the rugae the characteristic of unique, then rugae can be useful in forensic identification. Key words: Forensic sciences. Forensic dentistry. Dentistry identification. Palatal rugae. Rugoscopy.

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