scholarly journals Frequency and Variability of Five Non-Metric Dental Crown Traits in the Primary and Permanent Dentitions of a Racially Mixed Population from Cali, Colombia

2018 ◽  
Vol 19 (2) ◽  
pp. 39-48 ◽  
Author(s):  
Luisa Aguirre ◽  
Diana Castillo ◽  
Diana Solarte ◽  
Freddy Moreno
Keyword(s):  
Descriptive Study ◽  
Mixed Population ◽  
Mixed Dentition ◽  
Dental Morphology ◽  
Low Frequencies ◽  
High Prevalence ◽  
Racially Mixed ◽  
Dental Traits ◽  
Groove Pattern ◽  
Crown Traits

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.

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

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.  

scholarly journals Correlation of ten non-metric dental traits between deciduous and permanent molars of three ethnic colombian groups.

2017 ◽  
Vol 17 (2) ◽  
Author(s):  
Ángela Ocampo ◽  
Juan David Sánchez ◽  
Carlos Humberto Martínez Cajas ◽  
Freddy Moreno
Keyword(s):  
Environmental Influence ◽  
Ethnic Origin ◽  
Mixed Population ◽  
Dental Morphology ◽  
Dental Anthropology ◽  
Permanent Molars ◽  
Colombian Amazon ◽  
Racially Mixed ◽  
Dental Traits ◽  
Dental Casts

Summary Objective: To determine correlations of ten non-metric dental crown traits NMDCT (Carabelli, hipocon2, enamel bridge, metaconule, protostylid, deflecting wrinkle, pattern cusp, cusp number and 6 and 7 cusp) between deciduous second upper (um2) and low (lm2) molars, permanent first upper (UM1) and lower (LM1) molars and permanent second upper (UM2) and lower (LM2) molars were studied. Materials and Methods: This descriptive study determines the correlation of ten NMDCT through of the frequency and variability, observed on 201 dental casts of Cali racially mixed population, 84 dental casts of Puerto Tejada African-Colombian population and 60 dental casts of Colombian Amazons natives. Results: The Colombian Amazon natives showed high correlation in Carabelli and cusp number between um2/UM1; and very high in metaconule and pattern cusp. Cali racially mixed population showed moderated correlation in Carabelli, deflecting wrinkle and pattern cusp between um2/UM1; and high in 6 cusp. And between UM1/UM2/LM1/LM2 moderate in deflecting wrinkle; and high in protostylid, pattern cusp and 6 cusp. Puerto Tejada African-Colombian population showed moderated correlation between UM1/UM2/LM1/LM2 in deflecting wrinkle; and high in protostylid, pattern cusp and 6 cusp. Conclusions: Findings support the proposal of morphogenetic field theory, which exposes that the key tooth in deciduous and permanent molars is um2/lm2 because it retains the basic configuration of contact and number of cusps pattern, so UM1/UM2/LM1/LM2 will vary according to ethnic origin and to the environmental influence of each ofn three studied ethnic groups. Key words: Dental anthropology. Dental morphology. Non-metric dental traits. Deciduous dentition. Permanent dentition. Correlations.

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

2019 ◽  
Vol 23 (3) ◽  
pp. 458
Author(s):  
Deepak Venkatesh ◽  
V Sanchitha ◽  
T Smitha ◽  
Geeta Sharma ◽  
Shivaprasad Gaonkar ◽  
...  
Keyword(s):  
Mixed Population ◽  
Racially Mixed ◽  
Crown Traits ◽  
Dental Crown

scholarly journals Morphological variation of the deciduous second molars in the Baka Pygmies

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Petra G. Šimková ◽  
Gerhard W. Weber ◽  
Fernando V. Ramirez Rozzi ◽  
Lotfi Slimani ◽  
Jérémy Sadoine ◽  
...  
Keyword(s):  
Growth Rate ◽  
Morphological Variation ◽  
Growth Pattern ◽  
Distal Region ◽  
Dental Morphology ◽  
Human Sample ◽  
Different Populations ◽  
Dental Traits ◽  
South Americans ◽  
Range Of Variation

AbstractThe Baka Pygmies are known for their short stature resulting from a reduced growth rate during infancy. They are peculiar also for their teeth erupt earlier than in any other African population, and their posterior dentition is larger than in non-Pygmy populations. However, the Baka’s dental morphology, like several other aspects of their biology, is still understudied. Here, we explore the variation of the Baka’s deciduous upper and lower second molars (dm2s) in comparison to a geographically heterogeneous human sample by means of 3D geometric morphometrics and analysis of dental traits. Our results show that the different populations largely overlap based on the shape of their dm2s, especially the lower ones. Their distal region and the height of the dentinal crown differ the most, with the Baka showing the most extreme range of variation. Upper and lower dm2s covary to a great extent (RV = 0.82). The Baka’s and South Americans’ dm2s were confirmed among the largest in our sample. Despite the Baka’s unique growth pattern, long-lasting isolation, and extreme dental variation, it is not possible to distinguish them from other populations based on their dm2s’ morphology only.

scholarly journals A descriptive study of colorectal function in adults with Prader-Willi Syndrome: high prevalence of constipation

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
Louise Kuhlmann ◽  
Iben Moeller Joensson ◽  
Jens Broendum Froekjaer ◽  
Klaus Krogh ◽  
Stense Farholt
Keyword(s):  
Descriptive Study ◽  
Prader Willi Syndrome ◽  
High Prevalence

scholarly journals Testing the utility of dental morphological trait combinations for inferring human neutral genetic variation

2020 ◽  
Vol 117 (20) ◽  
pp. 10769-10777 ◽  
Author(s):  
Hannes Rathmann ◽  
Hugo Reyes-Centeno
Keyword(s):  
Modern Human ◽  
Genomic Variation ◽  
Future Research ◽  
Human Populations ◽  
Dental Morphology ◽  
Genomic Signatures ◽  
Neutral Genetic Variation ◽  
Tooth Form ◽  
Dental Traits ◽  
Population Affinity

Researchers commonly rely on human dental morphological features in order to reconstruct genetic affinities among past individuals and populations, particularly since teeth are often the best preserved part of a human skeleton. Tooth form is considered to be highly heritable and selectively neutral and, therefore, to be an excellent proxy for DNA when none is available. However, until today, it remains poorly understood whether certain dental traits or trait combinations preserve neutral genomic signatures to a greater degree than others. Here, we address this long-standing research gap by systematically testing the utility of 27 common dental traits and >134 million possible trait combinations in reflecting neutral genomic variation in a worldwide sample of modern human populations. Our analyses reveal that not all traits are equally well-suited for reconstructing population affinities. Whereas some traits largely reflect neutral variation and therefore evolved primarily as a result of genetic drift, others can be linked to nonstochastic processes such as natural selection or hominin admixture. We also demonstrate that reconstructions of population affinity based on many traits are not necessarily more reliable than those based on only a few traits. Importantly, we find a set of highly diagnostic trait combinations that preserve neutral genetic signals best (up to x∼r = 0.580; 95% r range = 0.293 to 0.758; P = 0.001). We propose that these trait combinations should be prioritized in future research, as they allow for more accurate inferences about past human population dynamics when using dental morphology as a proxy for DNA.

scholarly journals Variation in Dental Crown Morphology in Malaysian Populations

2018 ◽  
Vol 19 (2) ◽  
pp. 49-60 ◽  
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.

scholarly journals Epidemiological profile of women with endometriosis: a retrospective descriptive study

2020 ◽  
Vol 20 (4) ◽  
pp. 1057-1067
Author(s):  
Jéssica Vilarinho Cardoso ◽  
Daniel Escorsim Machado ◽  
Mayara Calixto da Silva ◽  
Plínio Tostes Berardo ◽  
Renato Ferrari ◽  
...  
Keyword(s):  
Regression Models ◽  
Descriptive Study ◽  
Uterosacral Ligament ◽  
Clinical Profile ◽  
Reproductive Age ◽  
Logistic Regression Models ◽  
Ovarian Endometrioma ◽  
High Prevalence ◽  
Referral Hospitals ◽  
Epidemiological Profile

Abstract Objectives: to describe the epidemiological and clinical profile of women with endometriosis and to determine the association with the prognostic characteristics of the disease. Methods: retrospective descriptive study involving 237 women attended at two referral hospitals for endometriosis, between 2011 and 2017. Associations between groups were estimated using logistic regression models. Results: most women (65.4%) were of reproductive age (29-39 years), with a body mass index in the range of 18.5-24.9 kg/m2 and a high prevalence (23-81%) of symptoms of the disease, with 49.5% being infertile. The average time of diagnosis was 5 years. Ovarian endometrioma and/or deep infiltrative endometriosis (DIE) were the most frequent type of endometriosis (87%), and 59% of patients were in the III/IV stage of the disease. Approximately 87% of women with surgical diagnosis were aged over 30, married (70%) and had lower parity. Dyspareunia was negatively associated with superficial endometriosis. Infertility was positively associated with age (30-39 years) and DIE in the uterine tubes; dysmenorrhea with DIE in the uterosacral ligament; cyclic intestinal complaints with DIE in the rectosigmoid and intestine, and with DIE classification and III/IVstage. Conclusions: knowing the epidemiological and clinical profile of Brazilian women with endometriosis can help in diagnosis and treatment planning.

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