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[PMID]:28832922
[Au] Autor:Stojanowski CM; Paul KS; Seidel AC; Duncan WN; Guatelli-Steinberg D
[Ad] Endereço:Center for Bioarchaeological Research, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, 85287.
[Ti] Título:Heritability and genetic integration of tooth size in the South Carolina Gullah.
[So] Source:Am J Phys Anthropol;164(3):505-521, 2017 Nov.
[Is] ISSN:1096-8644
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: This article provides estimates of narrow-sense heritability and genetic pleiotropy for mesiodistal tooth dimensions for a sample of 20th century African American individuals. Results inform biological distance analysis and offer insights into patterns of integration in the human dentition. MATERIALS AND METHODS: Maximum mesiodistal crown dimensions were measured using Hillson-FitzGerald calipers on 469 stone dental casts from the Menegaz-Bock Collection. Narrow-sense heritability estimates and genetic and phenotypic correlations were estimated using SOLAR 8.1.1 with covariate screening for age, sex, age*sex interaction, and birth year. RESULTS: Heritability estimates were moderate (∼0.10 - 0.90; h mean = 0.51) for most measured variables with sex as the only significant covariate. Patterns of genetic correlation indicate strong integration across tooth classes, except molars. Comparison of these results to previously published work suggests lower overall heritability relative to other human populations and much stronger genetic integration across tooth classes than obtained from nonhuman primate genetic pleiotropy estimates. CONCLUSIONS: These results suggest that the high heritabilities previously published may reflect overestimates inherent in previous study designs; as such the standard estimate of 0.55 used in biodistance analyses may not be appropriate. For the Gullah, isolation and endogamy coupled with elevated levels of physiological and economic stress may suppress narrow-sense heritability estimates. Pleiotropy analyses suggest a more highly integrated dentition in humans than in other mammals.
[Mh] Termos MeSH primário: Afroamericanos/genética
Grupos Étnicos/genética
Tamanho do Órgão/genética
Característica Quantitativa Herdável
Dente/anatomia & histologia
[Mh] Termos MeSH secundário: Antropologia Física
Dentição Permanente
Feminino
Seres Humanos
Masculino
Odontometria
South Carolina
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171030
[Lr] Data última revisão:
171030
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170824
[St] Status:MEDLINE
[do] DOI:10.1002/ajpa.23290


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[PMID]:28653052
[Au] Autor:Wilson D; Soileau K; Esquivel J; Cordero A; Buchman W; Maney P; Archontia Palaiologou A
[Ti] Título:Assessment of gingival symmetry with digital measuring tools and its reproducibility.
[So] Source:Int J Esthet Dent;12(2):232-242, 2017.
[Is] ISSN:2198-591X
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: The aim of this study was to investigate the accuracy of digital measuring tools to measure the position of gingival zeniths and to assess its reproducibility between different examiners. MATERIALS AND METHODS: A total of 108 subjects were photographed at the Louisiana State University School of Dentistry. The settings, positioning of the digital camera, and subjects' Frankfurt levels were standardized. A photograph was taken of the six anterior maxillary teeth of each subject, and their corresponding free gingival margins. Digital caliper measurements were taken intraorally from the zenith to the incisal edge of the right maxillary central incisor. A reference line was drawn across the screen on each image at the level of the zenith of tooth 8. Three calibrated examiners then measured the distance from the reference line to the zeniths of the other five anterior maxillary teeth. RESULTS/CONCLUSIONS: There was no statistically significant difference between the examiners regarding any of the measurements. Central incisors were at the same level in 84.24% of the subjects, and lateral incisors were within 0.5 mm of central incisors in only 58% of the subjects. Canine zeniths were within 0.5 mm of each other in 43% of the subjects. Only 28% of the subjects presented with zeniths of tooth 6 to tooth 11 within 0.5 mm of each other. Lateral incisors were at or beneath the line drawn from central incisors to cuspids in 90.8% of the subjects. Standardized digital photography taken with the aid of a stadiometer and used to evaluate esthetic parameters allowed for reproducible measurements.
[Mh] Termos MeSH primário: Dente Canino/anatomia & histologia
Gengiva/anatomia & histologia
Incisivo/anatomia & histologia
Odontometria/métodos
[Mh] Termos MeSH secundário: Adolescente
Adulto
Inserção Epitelial/anatomia & histologia
Estética Dentária
Feminino
Seres Humanos
Masculino
Meia-Idade
Fotografia Dentária
Reprodutibilidade dos Testes
Coroa do Dente/anatomia & histologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170821
[Lr] Data última revisão:
170821
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170628
[St] Status:MEDLINE


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[PMID]:28626923
[Au] Autor:Paul KS; Stojanowski CM
[Ad] Endereço:Center for Bioarchaeological Research, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, 85287.
[Ti] Título:Comparative performance of deciduous and permanent dental morphology in detecting biological relatives.
[So] Source:Am J Phys Anthropol;164(1):97-116, 2017 Sep.
[Is] ISSN:1096-8644
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: Dental morphology plays a key role in reconstructing population history and evolutionary relationships at global, regional, and intracemetery scales. At the inter-individual level, it is assumed that close biological kin exhibit greater phenotypic similarity than non-relatives. Heritability estimates provide one measure of phenotypic resemblance but are not easily incorporated into analyses of archaeological samples. In this study we evaluate the assumption that relatives are more similar phenotypically than non-relatives. We compare results for permanent dental morphology to those obtained using deciduous dental morphology in a matched dataset (Paul & Stojanowski, ). MATERIALS AND METHODS: Permanent trait expression was scored from dental casts representing 69 sibling pairs, curated as part of the longitudinal Burlington Growth Study. Simulating a biodistance approach, 22 morphological traits of permanent tooth crowns were used to generate 69 inter-relative and 2,076 non-relative Euclidean distances. Following distance ordination, family-specific dispersion values were calculated from multidimensional scaling coordinates. Output was compared to that of a previous study that focused on deciduous crown variation in the same set of individuals (Paul & Stojanowski, ). Mantel tests were used to evaluate the correlation of a proxy genetic distance matrix to both the permanent and deciduous dental distance matrices. RESULTS: On average, inter-relative distances generated from morphological traits of permanent tooth crowns were smaller than expected by chance based on resampling (p < 0.001). While family-specific dispersion varied greatly for both permanent and deciduous datasets, over 75% of the families exhibited greater dispersion with permanent traits. This suggests that morphological traits of the permanent dentition provide a less faithful reflection of biological relatedness than morphological traits of the deciduous dentition. Mantel tests indicate that both the deciduous and permanent distance matrices are significantly correlated with a matrix of genetic relatedness coefficients; however, the magnitude of the correlations was low. DISCUSSION: Overall, morphological traits of permanent tooth crowns perform moderately well in distinguishing relatives from non-relatives, but deciduous crown variations may provide a more direct reflection of the underlying genetic structure of intra-site or intra-cemetery samples. These findings have implications for bioarchaeological research and biodistance practices. In particular, morphological traits of the deciduous dentition should be incorporated into standard data collection protocols because of their stronger signal of relatedness.
[Mh] Termos MeSH primário: Dentição Permanente
Irmãos
Dente Decíduo/anatomia & histologia
Dente/anatomia & histologia
[Mh] Termos MeSH secundário: Adulto
Antropologia Física
Criança
Feminino
Seres Humanos
Masculino
Odontometria
Estatísticas não Paramétricas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170911
[Lr] Data última revisão:
170911
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170620
[St] Status:MEDLINE
[do] DOI:10.1002/ajpa.23260


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[PMID]:28606332
[Au] Autor:Gouveia MF; Oliveira Santos I; Santos AL; Gonçalves D
[Ad] Endereço:Centro de Investigação em Antropologia e Saúde (CIAS), Department of Life Sciences, University of Coimbra, Portugal. Electronic address: uc2010132835@student.uc.pt.
[Ti] Título:Sample-specific odontometric sex estimation: A method with potential application to burned remains.
[So] Source:Sci Justice;57(4):262-269, 2017 07.
[Is] ISSN:1355-0306
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Metric features are often the only preserved sexually dimorphic features to allow sex estimation in burned human remains, but this is complicated by heat-induced dimensional changes. The potential of odontometry for sex estimation was investigated. A sample of permanent lower second pre-molars from 20 males and 20 females was experimentally burned at 900°C to assess heat-induced changes in the sexual dimorphism of seven dimensions of the cementum-enamel junction and the root. Four of them, cementum-enamel junction perimeter; mesiodistal, buccolingual and perimeter at the mid-root level, were investigated for the first time. Also, five measurements combining some of the isolated standard measurements were investigated. Additionally, 10 permanent upper central incisors and 10 permanent lower first molars were experimentally burned at 400°C and 700° C to document heat-induced dimensional changes and serve as comparison with the 900°C sample. Results showed that most of the standard measurements, although presenting significant sex differences, were not reliable enough to allow for correct sex classifications close to 100% both before and after the burning. Nonetheless, the perimeter at the cementum-enamel junction and the combined measurements of the mesiodistal and buccolingual diameters, at the same level, were quite promising in the post-burning analysis with correct sex classifications above 80%. At 900°C, females were slightly more affected by shrinkage in this measure than males thus artificially increasing sexual dimorphism after burning. Therefore, and although additional research is needed, this feature was not discarded as having potential for skeletal sex estimation.
[Mh] Termos MeSH primário: Cremação
Odontometria
Caracteres Sexuais
[Mh] Termos MeSH secundário: Adolescente
Adulto
Idoso
Idoso de 80 Anos ou mais
Cemento Dentário/patologia
Esmalte Dentário/patologia
Feminino
Fogo
Odontologia Legal
Seres Humanos
Masculino
Meia-Idade
Reprodutibilidade dos Testes
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170614
[St] Status:MEDLINE


  5 / 3481 MEDLINE  
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[PMID]:28558311
[Au] Autor:Felemban NH; Manjunatha BS
[Ad] Endereço:Orthodontic Department, Faculty of Dentistry, Taif University, Taif, Saudi Arabia. Electronic address: nfelemban@tudent.edu.sa.
[Ti] Título:Prevalence of the number of cusps and occlusal groove patterns of the mandibular molars in a Saudi Arabian population.
[So] Source:J Forensic Leg Med;49:54-58, 2017 Jul.
[Is] ISSN:1878-7487
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A dental trait in humans can be a valuable diagnostic tool in anthropological studies for classifying and characterizing different ethnic groups. Many studies have attempted to relate the prevalence of dental morphologies with different factors. Several variations, such as variations in the size, number of cusps, and groove pattern, have been observed in the mandibular molars of diverse populations. The morphological features of the occlusal surfaces of the mandibular molars have been described by Gregory and Hellman. To date, no studies have been reported in the literature regarding the frequency and expression of different types of cusps and the occlusal groove patterns in a Saudi Arabian population. The present study aimed to determine the prevalence of different occlusal morphologies (number of cusps and occlusal groove patterns) of the permanent mandibular first and second molar in a Saudi population and to correlate its importance in forensics, if any. The results of this study showed that the most frequent occlusal configurations were the 5-cusp pattern seen in 85% (136 teeth) and the 4-cusp pattern seen in 11% (18 teeth) of the mandibular first molars, bilaterally. Regarding the mandibular second molars, the 4-cusp form was the most common occlusal configuration, seen in 82% (132 teeth), followed by the 5-cusps type, seen in approximately 16% (26 teeth), bilaterally. Statistically significant (P value = 0.001) differences were noted for the permanent mandibular first and second molars between male and female subjects in all cusp and groove patterns ("Y" and "+" patterns). Similarly, significant differences (P value = 0.001) were found between the unilateral and bilateral presence of different cusp and groove patterns, both in the mandibular first and second molars. The present study showed that the groove pattern in the mandibular first molars was very different when compared to other populations. The cusp and groove patterns of the mandibular second molars were similar to those of the East African and Iranian populations. The results of this study may be used in forensics. Thus, the outcomes of this study may be helpful in both anthropological and clinical dental research.
[Mh] Termos MeSH primário: Dente Molar/anatomia & histologia
[Mh] Termos MeSH secundário: Adolescente
Adulto
Criança
Dentição Permanente
Feminino
Seres Humanos
Masculino
Mandíbula
Odontometria
Fotografia
Arábia Saudita
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170531
[St] Status:MEDLINE


  6 / 3481 MEDLINE  
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[PMID]:28375424
[Au] Autor:Marado LM
[Ad] Endereço:Unit of Archaeology, University of Minho, Edifício dos Congregados, Avenida Central, 100, 4710-229 Braga, Portugal.
[Ti] Título:Dental nonmetric trait intraobserver precision: three observations of a large sample.
[So] Source:Anthropol Anz;74(1):15-23, 2017 Apr 01.
[Is] ISSN:0003-5548
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:ABSTRACT: The utility of nonmetric dental traits in population phenetic studies is well documented. However, consistency in scoring trait expression is a concern due to the subjectivity in scoring quasicontinuous variables with graded scales. The aims of this study are to 1) analyze intraobserver results from an independent scorer and 2) interpret the least precise results. Six hundred individuals (300 of each sex) were scored for 48 dental nonmetric traits using ASUDAS, in one preliminary (100 individuals) and two full observations. Intraobserver precision between scoring sessions yielded adequate results (85% to 100%), with two notable exceptions (UI2 and LC distal accessory ridge) and three somewhat problematic cases (UM2 hypocone, UM1 Carabelli's trait, and LM1 anterior fovea). Kendall's τ-b rank correlation coefficients are usually moderate to strong (> 0.3). The results are similar to previously published studies of observer error. Error rates are likely caused by inexperience in observable surface selection and trait/grade definition. ASUDAS requires restraint from scoring teeth that are too worn or modified by caries or chipping. A careful study of trait and grade definitions is strongly encouraged. The key element in achieving high precision rates is experience. Intraobserver (and, if needed, interobserver) error should always be calculated. Overall, ASUDAS is a reliable and useful method, especially if the author's recommendations are followed.
[Mh] Termos MeSH primário: Odontometria/métodos
Odontometria/normas
Dente/anatomia & histologia
[Mh] Termos MeSH secundário: Antropologia Física
Feminino
Seres Humanos
Masculino
Reprodutibilidade dos Testes
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170914
[Lr] Data última revisão:
170914
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170405
[St] Status:MEDLINE
[do] DOI:10.1127/anthranz/2017/0686


  7 / 3481 MEDLINE  
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[PMID]:28218399
[Au] Autor:Spradley JP; Pampush JD; Morse PE; Kay RF
[Ad] Endereço:Department of Evolutionary Anthropology, Duke University, Durham, North Carolina, 27708.
[Ti] Título:Smooth operator: The effects of different 3D mesh retriangulation protocols on the computation of Dirichlet normal energy.
[So] Source:Am J Phys Anthropol;163(1):94-109, 2017 May.
[Is] ISSN:1096-8644
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: Dirichlet normal energy (DNE) is a metric of surface topography that has been used to evaluate the relationship between the surface complexity of primate cheek teeth and dietary categories. This study examines the effects of different 3D mesh retriangulation protocols on DNE. We examine how different protocols influence the DNE of a simple geometric shape-a hemisphere-to gain a more thorough understanding than can be achieved by investigating a complex biological surface such as a tooth crown. MATERIALS AND METHODS: We calculate DNE on 3D surface meshes of hemispheres and on primate molars subjected to various retriangulation protocols, including smoothing algorithms, smoothing amounts, target face counts, and criteria for boundary face exclusion. Software used includes R, MorphoTester, Avizo, and MeshLab. DNE was calculated using the R package "molaR." RESULTS: In all cases, smoothing as performed in Avizo sharply decreases DNE initially, after which DNE becomes stable. Using a broader boundary exclusion criterion or performing additional smoothing (using "mesh fairing" methods) further decreases DNE. Increasing the mesh face count also results in increased DNE on tooth surfaces. CONCLUSIONS: Different retriangulation protocols yield different DNE values for the same surfaces, and should not be combined in meta-analyses. Increasing face count will capture surface microfeatures, but at the expense of computational speed. More aggressive smoothing is more likely to alter the essential geometry of the surface. A protocol is proposed that limits potential artifacts created during surface production while preserving pertinent features on the occlusal surface.
[Mh] Termos MeSH primário: Imagem Tridimensional/métodos
Dente Molar/anatomia & histologia
Odontometria/métodos
Primatas/anatomia & histologia
Propriedades de Superfície
[Mh] Termos MeSH secundário: Algoritmos
Animais
Antropologia Física
Software
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170609
[Lr] Data última revisão:
170609
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170221
[St] Status:MEDLINE
[do] DOI:10.1002/ajpa.23188


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[PMID]:27810383
[Au] Autor:Shaweesh AI
[Ad] Endereço:Faculty of Dentistry, Jordan University of Science and Technology, PO Box 3030, Ramtha, Irbid, 22110, Jordan; Melbourne Dental School, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, 720 Swanston St., Carlton, VIC, 3010, Australia. Electronic address: ashrafis@just.edu.jo.
[Ti] Título:Mesiodistal and faciolingual diameters of the permanent teeth in a Jordanian population.
[So] Source:Arch Oral Biol;73:253-258, 2017 Jan.
[Is] ISSN:1879-1506
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: This study aimed to provide, for a Jordanian population, the first norms of the faciolingual diameters of the permanent dentition and the mesiodistal diameters of the second molars and to provide and review previously published data on the mesiodistal diameters of the permanent teeth up to the first molars in order to investigate any secular trends. DESIGN: Mesiodistal and faciolingual diameters of the permanent teeth were manually measured on 204 archival pretreatment study casts of adolescents (80 males and 124 females) aged 11-18 years. SPSS (version 16) was used to generate descriptive statistics and investigate the statistically significant differences between right and left sides and between sexes. RESULTS: Males had larger teeth than females, significantly in the mesiodistal dimension and less significantly in the faciolingual dimension. Moreover, in the faciolingual dimension, there was a wider variation in anterior compared with posterior teeth and in males compared with females while the variations were more consistent mesiodistally between anterior and posterior teeth and between sexes. There were some secular trends in the mesiodistal permanent tooth diameters of Jordanians toward a slight reduction and wider variation in tooth size and a slight reduction in sexual dimorphism. CONCLUSIONS: the present study has established the first norms of the faciolingual permanent tooth diameters for a Jordanian population which were consistent with corresponding norms that have been published for few other populations. In addition, the present study has provided norms of the mesiodistal permanent tooth diameters of a Jordanian population that are newer and more complete than the previously published norms. It is anticipated that the new norms presented will be utilized in various clinical disciplines of dentistry, in basic dental research, in forensic odontology and in anthropological research.
[Mh] Termos MeSH primário: Dentição Permanente
Odontometria/estatística & dados numéricos
Coroa do Dente/anatomia & histologia
[Mh] Termos MeSH secundário: Adolescente
Dente Pré-Molar/anatomia & histologia
Criança
Dente Canino/anatomia & histologia
Feminino
Seres Humanos
Jordânia/epidemiologia
Masculino
Mandíbula/anatomia & histologia
Maxila/anatomia & histologia
Dente Molar/anatomia & histologia
Odontogênese
Odontometria/métodos
Dente Decíduo/anatomia & histologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170426
[Lr] Data última revisão:
170426
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:161105
[St] Status:MEDLINE


  9 / 3481 MEDLINE  
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[PMID]:27890318
[Au] Autor:Marado LM; Silva AM
[Ad] Endereço:Lab2PT - Landscape, Heritage and Territory Laboratory, Unit of Archaeology, University of Minho, Portugal. Electronic address: luismarado@gmail.com.
[Ti] Título:The mandibular molar pit-tubercle (MMPT) dental nonmetric trait: Comprehensive analysis of a large sample.
[So] Source:Homo;67(6):462-470, 2016 Dec.
[Is] ISSN:1618-1301
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Dental nonmetric traits are quasicontinous variables, mostly of genetic origin. Thus, sets of such traits allow biological distance estimation between samples. Mandibular molar pit-tubercle (MMPT) is a buccal trait defined by Weets (2009) in Irish samples. This study aims to analyze (a) trait frequencies, (b) grade definitions, (c) intraobserver error, (d) sexual dimorphism, (e) asymmetry, and (f) trait associations for MMPT in a Portuguese sample. The first (LM1), second (LM2) and third (LM3) lower molars of 600 identified individuals from the Coimbra collections were scored for MMPT in three scoring sessions. Intraobserver error, bilateral asymmetry and trait correlations were tested using Kendall's τ-b, while sexual dimorphism was verified using Pearson's χ . Frequencies (LM1: 2.1%; LM2: 3.5%; LM3: 30.3%) were similar to previous reports. However, a new free apex cusp form (grade 3+) was detected. Considering three scoring sessions, intraobserver precision was above 85%, and correlation coefficients between observations were positive and moderate to very strong (0.291<τ-b<0.835). Intrasample variation was low, since only LM3 showed sexual dimorphism (female: 30.2%; males: 16.2%; χ =15.512; p<0.001; df=1; n=556) and large asymmetry (27.1%). There were no strong (τ-b>0.3) intertrait associations involving MMPT. MMPT shows low trait presence, sexual dimorphism and asymmetry in stable teeth (LM1 and LM2). Intraobserver precision is high, so scoring should be reliable, although a plaque and better threshold grade definition is needed. After further research on non-European samples, MMPT can be useful in biodistance research.
[Mh] Termos MeSH primário: Dente Molar/anatomia & histologia
Coroa do Dente/anatomia & histologia
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Masculino
Mandíbula
Odontometria
Fenótipo
Portugal
Caracteres Sexuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170509
[Lr] Data última revisão:
170509
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161129
[St] Status:MEDLINE


  10 / 3481 MEDLINE  
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[PMID]:27871715
[Au] Autor:Wan Hassan WN; Othman SA; Chan CS; Ahmad R; Ali SN; Abd Rohim A
[Ad] Endereço:Senior lecturer, Department of Paediatric Dentistry and Orthodontics and Clinical Craniofacial Dentistry Research Group, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia. Electronic address: wannurazreena@um.edu.my.
[Ti] Título:Assessing agreement in measurements of orthodontic study models: Digital caliper on plaster models vs 3-dimensional software on models scanned by structured-light scanner.
[So] Source:Am J Orthod Dentofacial Orthop;150(5):886-895, 2016 Nov.
[Is] ISSN:1097-6752
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: In this study we aimed to compare measurements on plaster models using a digital caliper, and on 3-dimensional (3D) digital models, produced using a structured-light scanner, using 3D software. METHODS: Fifty digital models were scanned from the same plaster models. Arch and tooth size measurements were made by 2 operators, twice. Calibration was done on 10 sets of models and checked using the Pearson correlation coefficient. Data were analyzed by error variances, repeatability coefficient, repeated-measures analysis of variance, and Bland-Altman plots. RESULTS: Error variances ranged between 0.001 and 0.044 mm for the digital caliper method, and between 0.002 and 0.054 mm for the 3D software method. Repeated-measures analysis of variance showed small but statistically significant differences (P <0.05) between the repeated measurements in the arch and buccolingual planes (0.011 and 0.008 mm, respectively). There were no statistically significant differences between methods and between operators. Bland-Altman plots showed that the mean biases were close to zero, and the 95% limits of agreement were within ±0.50 mm. Repeatability coefficients for all measurements were similar. CONCLUSIONS: Measurements made on models scanned by the 3D structured-light scanner were in good agreement with those made on conventional plaster models and were, therefore, clinically acceptable.
[Mh] Termos MeSH primário: Simulação por Computador
Modelos Dentários
[Mh] Termos MeSH secundário: Tomografia Computadorizada de Feixe Cônico
Arco Dental/anatomia & histologia
Arco Dental/diagnóstico por imagem
Seres Humanos
Imagem Tridimensional
Odontometria/instrumentação
Software
Dente/anatomia & histologia
Dente/diagnóstico por imagem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:161123
[St] Status:MEDLINE



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