Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.572
Filtrar
1.
Quintessence Int ; 51(6): 510-518, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32424377

RESUMO

Digital photography has already established its irrefutable importance in today's world. It is becoming an indispensable tool in various fields. In dentistry specifically, photography can be employed in several ways that can be beneficial to the patient and the dental community. It allows a simple and clear depiction of an otherwise abstract concept, but high-quality pictures are always required. The evolution of mobile cameras has made an enormous impact on digital photography and its accessibility: high-quality pictures can now be easily taken. This article explains the assets of smartphone cameras' evolution and how it led to the conception of Smile Lite Mobile Dental Photography. Applications of dental photography are presented, such as documentation and communication with the laboratory technician and the patient. Mobile dental photography is not confined to dentistry but can also be used for artistic purposes. (Quintessence Int 2020;51:510-518; doi: 10.3290/j.qi.a44365; Originally published (in German) in Quintessenz Zahnmedizin 2019(12);70:1408-1417).


Assuntos
Documentação , Fotografia Dentária , Comunicação , Humanos , Fotografação , Sorriso
2.
Int J Comput Dent ; 22(4): 343-351, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31840142

RESUMO

The aim of this study was to assess the influence of a polarizing filter on the accuracy of dental shade matching using digital photography. A comparison was performed using ΔEab parameters between CIE L*a*b* values obtained from digital images taken under two different conditions (with direct light and with polarized light) and the values given by the dental spectrophotometer SpectroShade Micro, which is considered to be the standard. Color differences (ΔEab) calculated between the parameters recorded with the dental spectrophotometer and polarized photography were below or at the level of the 50:50% acceptability threshold of 2.7 in 23% of the cases. Interdevice agreement found between the dental spectrophotometer and polarized photography exceeded 0.82 for all the three parameters recorded. Digital photography with polarizing filters might be a useful tool for dental shade matching.


Assuntos
Fotografação , Pigmentação em Prótese , Algoritmos , Cor , Planejamento de Prótese Dentária , Humanos , Fotografia Dentária , Espectrofotometria
3.
J Indian Soc Pedod Prev Dent ; 37(4): 360-364, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31710010

RESUMO

Background: Smartphone is proved to be reliable in teledentistry model. The aim of the study was to assess the mother's ability in caries diagnosis, utilizing the smartphone-based photographic method. Hypothesis: Mothers have the ability for caries diagnosis utilizing the smartphone photographic method. Methods: A cohort of 100 mothers was given health education regarding dental caries diagnosis. Then, their children from the preschools were screened by the dentist for dental caries using visual examination, followed by clicking intraoral photographs using Motorola 3G phone. The photographs were sent through WhatsApp to respective mothers, and they were asked to diagnose their child's dental status. Accuracy and reliability measures of mother's diagnosis were estimated by calculating the sensitivity, specificity, predictive values, and kappa value. Results: The calculated value for sensitivity was 88.3%, specificity was 98.3%, positive predictive value was 92%, negative predictive value was 97%, and accuracy was 96%. There was a strong agreement between mother's and dentist's diagnosis (kappa value of 0.87). Conclusion: Following the dental health education, it can be concluded that mothers are in a better position to diagnose their child's dental status through smartphone-based photographs.


Assuntos
Cárie Dentária , Smartphone , Criança , Pré-Escolar , Feminino , Humanos , Mães , Fotografia Dentária , Reprodutibilidade dos Testes
4.
Am J Orthod Dentofacial Orthop ; 156(3): 420-428, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31474272

RESUMO

INTRODUCTION: This study aimed to test the accuracy of the 3-dimensional (3D) digital dental models generated by the Dental Monitoring (DM) smartphone application in both photograph and video modes over successive DM examinations in comparison with 3D digital dental models generated by the iTero Element intraoral scanner. METHODS: Ten typodonts with setups of class I malocclusion and comparable severity of anterior crowding were used in the study. iTero Element scans along with DM examination in photograph and video modes were performed before tooth movement and after each set of 10 Invisalign aligners for each typodont. Stereolithography (STL) files generated from the DM examinations in photograph and video modes were superimposed with the STL files from the iTero scans using GOM Inspect software to determine the accuracy of both photograph and video modes of DM technology. RESULTS: No clinically significant differences, according to the American Board of Orthodontics-determined standards, were found. Mean global deviations for the maxillary arch ranged from 0.00149 to 0.02756 mm in photograph mode and from 0.0148 to 0.0256 mm in video mode. Mean global deviations for the mandibular arch ranged from 0.0164 to 0.0275 mm in photograph mode and from 0.0150 to 0.0264 mm in video mode. Statistically significant differences were found between the 3D models generated by the iTero and the DM application in photograph and video modes over successive DM examinations. CONCLUSIONS: 3D digital dental models generated by the DM smartphone application in photograph and video modes are accurate enough to be used for clinical applications.


Assuntos
Confiabilidade dos Dados , Técnica de Moldagem Odontológica , Modelos Dentários , Processamento de Imagem Assistida por Computador/métodos , Imageamento Tridimensional/métodos , Desenho Assistido por Computador , Arco Dental , Humanos , Má Oclusão/diagnóstico por imagem , Aparelhos Ortodônticos/normas , Aparelhos Ortodônticos Removíveis , Ortodontia/normas , Fotografia Dentária , Smartphone , Software , Estereolitografia , Tecnologia Odontológica/métodos , Técnicas de Movimentação Dentária , Gravação em Vídeo
5.
Dent Traumatol ; 35(6): 302-308, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31177614

RESUMO

Traumatic dental injuries comprise a number of the dental emergency patients who are often seen after hours or on an unscheduled basis in a dental practice environment. Although there are a variety of traumatic dental injuries that can occur, each with their own recommended treatment protocols, the initial evaluation and diagnosis of the traumatized dentition make up a critical aspect of the management of these cases. This article will highlight the key components of a thorough and efficient examination process of the traumatized dentition to include (a) documenting an accurate history of the events causing the injury, (b) performing a systematic clinical examination to include the use of clinical photographs and pulp sensibility tests, (c) obtaining appropriate radiographic images and scans, (d) understanding some considerations unique to evaluating young patients with traumatic injuries, and (e) recognizing the importance of having accurate and thorough documentation of these types of cases. Once the evaluation and diagnosis phase has been completed, the necessary treatment protocols can be initiated in an appropriate manner.


Assuntos
Dentição , Traumatismos Dentários , Perda de Dente , Polpa Dentária/lesões , Documentação , Humanos , Fotografia Dentária , Traumatismos Dentários/diagnóstico , Perda de Dente/diagnóstico , Perda de Dente/etiologia
6.
J Prosthodont Res ; 63(4): 404-410, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31053442

RESUMO

PURPOSE: To assess the effect of the shooting angle variation on linear and planimetric measurements of the pink and white tissues on intraoral photographs. METHODS: From intraoral three-dimensional (3D) scans of the anterior region in 10 patients, ninety-nine two-dimensional (2D) "scan pictures" each were generated with different shooting angles, each varying in 5° horizontal and vertical increments. Eleven intraoral photographs of each patient and tooth site were taken free-hand: one shot at baseline and 5 shots after 3 and 6 months at slightly varying shooting angles. Papilla height (PH) and area (PA) and tooth crown area (TCA) were estimated on all photographs; the "best-match-to-baseline" photograph from those taken at 3 and 6 months was chosen by 6 evaluators. RESULTS: Within the first 10° of deviation from the baseline shooting angle, measurements on the 2D "scan pictures" distorted ≤0.5 mm for PH and ≤10% for PA and TCA. Compared to baseline, only 6 out of 100 photographs presented ≥0.5 mm difference in PH, none of the TCA measurements showed distortion ≥10%, and only in 4 instances a ≥10% distortion of the PA was observed. Poor to moderate inter- and intra-rater agreement in choosing the "best-match-to-baseline" photograph was found, but photographs with clinically relevant changes were only seldomly chosen. CONCLUSIONS: Deviations in the shooting angle ≤10° from the baseline shot cause clinically negligible distortions in linear and planimetric measurements. Highly comparable intraoral photographs of the anterior maxillary teeth can be captured "free-hand" in slightly varying perspective, and then selecting the "best-match-to-baseline".


Assuntos
Fotografia Dentária , Dente , Humanos , Reprodutibilidade dos Testes
8.
Med Biol Eng Comput ; 57(8): 1629-1643, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31069699

RESUMO

In the field of dental image processing and analysis, automatic segmentation results of dental hard tissue can provide a useful reference for the clinical diagnosis and treatment process. However, the segmentation accuracy is greatly affected due to the limitation of imaging conditions in the oral environment, as well as the complexity of dental hard tissue topology. To further improve the precision of dental hard tissue segmentation, a novel algorithm was presented by using the sparse representation-based classifier and mathematical morphology operations. First, the captured dental image was preprocessed to eliminate the impact of imbalance local illumination. Then, the preliminary dental hard tissue areas were calculated as the initial marker regions based on color characteristics analysis, and the sparse representation-based classifier was applied sequentially to optimize the initial marker regions combined with certain morphological operations. Finally, a modified marker-controlled watershed transform was employed to segment dental hard tissue regions on the basis of the optimized marker regions, and the final results were obtained after homogeneous region merging. The experimental results show that our method has better adaptability and robustness than existing state-of-the-art methods. Graphical abstract.


Assuntos
Algoritmos , Esmalte Dentário/diagnóstico por imagem , Processamento de Imagem Assistida por Computador/métodos , Fotografia Dentária/métodos , Dente/diagnóstico por imagem , Bases de Dados Factuais , Esmalte Dentário/patologia , Humanos , Fotografia Dentária/estatística & dados numéricos , Máquina de Vetores de Suporte , Dente/patologia , Gravação em Vídeo
9.
Rev. Odontol. Araçatuba (Impr.) ; 40(2): 9-14, maio/ago. 2019. ilus
Artigo em Português | LILACS, BBO - Odontologia | ID: biblio-1006302

RESUMO

A reabilitação funcional e estética com cerâmicas adesivas é uma área da Odontologia em destaque tanto pelos resultados excepcionais que podem ser alcançados como pela demanda da sociedade contemporânea. Várias ferramentas de diagnóstico, planejamento e execução estão disponíveis com o objetivo de alcançar a excelência no tratamento reabilitador estético. O desenho digital do sorriso (DSD) é um dos recursos utilizados, possibilitando além da previsibilidade, comunicação e orientação eficiente da fase laboratorial, também a motivação do paciente. O objetivo desse trabalho foi apresentar um caso clínico de reabilitação oral estética guiado pelo DSD tanto para a abordagem periodontal como para o enceramento estético. Foram planejados e executados 10 laminados cerâmicos em dissilicato de lítio tendo como ponto de partida após exames clínicos, o enceramento e a plástica periodontal virtualmente desenhados. O resultado foi alcançado como almejado pelo paciente e previsto pelo profissional, sendo a presente reabilitação apoiada em criterioso protocolo de execução(AU)


Functional and aesthetic rehabilitation with adhesive ceramics is an area of dentistry that stands out both for the exceptional results that can be achieved and for the demands of contemporary society. Various diagnostic, planning and execution tools are available with the goal of achieving excellence in aesthetic rehabilitation treatment. The digital smile design (DSD) is one of the resources used, enabling not only the predictability, communication and efficient orientation of the laboratory phase, but also the motivation of the patient. The objective of this work was to present a clinical case of oral aesthetic rehabilitation guided by DSD for both the periodontal approach and aesthetic waxing. Ten ceramic laminates in lithium disilicate were designed and executed with virtually new clinical waxing and periodontal plastic as a starting point after clinical examination. The result was achieved as intended by the patient and predicted by the professional, and the present rehabilitation is supported by a judicious implementation protocol(AU)


Assuntos
Humanos , Feminino , Adulto , Fotografia Dentária , Estética Dentária , Reabilitação Bucal , Cerâmica
11.
Oper Dent ; 44(6): E279-E288, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31034351

RESUMO

OBJECTIVES: The aim of this trial was to investigate the diagnostic value of the basic erosive wear examination (BEWE) in clinical use, on dental photographs, and on dental casts over a two-year follow-up period (2013-2015). According to the main hypothesis for longitudinal monitoring of dental erosion, the BEWE is equally reproducible by the three assessment methods. METHODS AND MATERIALS: The clinical assessment included intraoral photographic documentation, dental impressions, oral examination, and assessment of BEWE. Clinical assessment of BEWE was done by one blinded examiner, whereas assessment on photographs and dental casts was performed by three calibrated examiners and repeated after 14 days. The three assessment methods were analyzed separately by longitudinal agreement and inter- and intrarater reliability (intraclass correlation coefficient) alongside 95% confidence intervals (CIs). RESULTS: Comparing the longitudinal data of the years 2013-2015, clinical use and photographs showed no significant difference (p=0.0681-0.9963), whereas the statistical analysis showed a significant difference for dental casts by comparing data from 2013 vs 2014 (p=0.0266) as well as data from 2013 vs 2015 (p=0.0001). Statistical evaluation of overall BEWE showed an intrarater reliability of 0.79-0.91 for photographs and 0.60-0.87 for dental casts. The interrater reliability was 0.77 (95% CI=[0.69; 0.84]) for photographs and 0.63 (95% CI=[0.52; 0.72]) for dental casts. CONCLUSION: This investigation showed that in longitudinal clinical monitoring, the assessment of the BEWE on patients and dental photographs yielded comparable results. In addition, based on these findings, the assessment of the BEWE on dental casts showed moderate reproducibility. Therefore, dental casts may be better used for laboratory assessment techniques.


Assuntos
Erosão Dentária , Técnica de Moldagem Odontológica , Diagnóstico Bucal , Humanos , Fotografia Dentária , Reprodutibilidade dos Testes
12.
Adv Clin Exp Med ; 28(11): 1469-1476, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30916899

RESUMO

BACKGROUND: A noninvasive, accurate and quick diagnosis is very important to general practitioners and specialists who care for the health of patients' oral cavity mucosa. The main enemies are precancerous lesions: leukoplakia and lichen planus (LP). OBJECTIVES: The aim of this study was to attempt to formulate a differential diagnosis for leukoplakia vs LP in the oral mucosa based on digital texture analysis in intraoral macrophotography. MATERIAL AND METHODS: The study was comprised of 21 patients affected by leukoplakia, 21 affected by LP and 21 healthy volunteers. Intraoral photography of all participants was taken perpendicularly to the buccal mucosa. To achieve the maximum possible contrast, a high-pass filter was applied and level tools were then used to equalize the histograms of the images. After that, the images were converted into 8-bit grayscale. Two features of run length matrix and 2 of co-occurrence matrix were used for texture analysis. Analysis of variance (ANOVA) was used to check for differences. Factor analysis (FA) and classification with artificial neural network (ANN) were performed. RESULTS: The results revealed a simple possible differentiation of both types of precancerous lesions from normal mucosa (p < 0.05). Factor analysis and ANN can help in differentiating the 3 study groups from one another. CONCLUSIONS: Differential diagnosis of leukoplakia and LP in the oral mucosa based on digital texture analysis in intraoral macrophotography is possible. It can be used to develop smartphone applications and can be also a helpful tool for general dentists to define the clinical problem before a consultation with a specialist.


Assuntos
Leucoplasia Oral/diagnóstico , Líquen Plano Bucal/diagnóstico , Líquen Plano , Mucosa Bucal/patologia , Estudos de Casos e Controles , Diagnóstico Diferencial , Humanos , Fotografia Dentária
13.
Pesqui. bras. odontopediatria clín. integr ; 19(1): 4709, 01 Fevereiro 2019. ilus
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-998221

RESUMO

Objective: To determine the DUSP6 gene mutation in three generations of Malaysian Malay subjects having Class III malocclusion. Material and Methods: Genetic analyses of DUSP6 gene were carried out in 30 subjects by selecting three individuals representing three generations, respectively, from ten Malaysian Malay families having Class III malocclusion and 30 healthy controls. They were submitted Clinical Evaluation to clinical examination, lateral cephalometric radiographs, dental casts, and/ or facial and intra-oral photographs. Buccal cell was taken from each participant of Class III malocclusion and control groups. DNA extractions from buccal cell were carried out using Gentra puregene buccal cell kit. Bio Edit Sequence Alignment Editor software was used to see the sequencing result. Results: A heterozygous missense mutation c.1094C>T (p. Thr 365 Ile) was identified in DUSP6 gene in three members of one family with Class III malocclusion, whereas no mutation was found in the control group. Conclusion: Current study successfully identified a missense mutation in DUSP6 gene among one Malaysian Malay family affected by Class III malocclusion. The outcome of this study broadened the mutation spectrum of Class III malocclusion and the importance of DUSP6 gene in skeletal functions.


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Variação Genética/genética , Cefalometria/métodos , Mutação de Sentido Incorreto , Má Oclusão , Arábia , Estudos de Casos e Controles , Fotografia Dentária/instrumentação
14.
J Prosthet Dent ; 121(2): 333-339, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30093117

RESUMO

STATEMENT OF PROBLEM: Color matching in restorative and prosthetic dentistry is important for the success of dental treatments, although communication with the dental laboratory remains subjective, and studies of the performance of objective communication methods are lacking. PURPOSE: The purpose of this study was to evaluate color differences (ΔE) and compare color luminosity (L*) values among different types of digital photography equipment used to document tooth color, with and without a gray reference card, and to determine whether the gray card could be used to standardize color assessment in dental photography. MATERIAL AND METHODS: Sixty photographs were made (n=10) using different equipment: a D7000 digital camera (Nikon Corp) with an 85-mm lens and wireless close-up flash (DC+WCF); close-up flash surrounded by 80 grams per square meter (gsm; specification of paper thickness) white printing paper (DC+WPP); ring flash (DC+RF); close-up flash attached to a dual-point rigid flash bracket (DC+DPRF); cross-polarizing filter attached to a close-up flash (DC+CPF); and iPhone 7 (I7). For all photographs, a gray reference card with known color values was positioned at the patients' mandibular teeth, acting as a parameter for the analysis of white-balanced digital photographs. Each photograph underwent white balance with the reference card and software. ΔE were obtained from each piece of equipment by comparing images with and without white balance (original photo) with software and the smallest ΔE achieved was used as the gold standard for comparisons of luminosity. Values of luminosity were subsequently obtained for the different equipment with and without white balancing the photographs; these values were compared using a general estimating equation with Huber-White standard error (α=.05). RESULTS: The use of a cross-polarizing filter was used as the gold standard for luminosity evaluation, as the smallest ΔE (3.4) among photographs were observed when those with and without white balance were compared. Luminosity results from the cross-polarizing filter method (DC+CPF) were not significantly different from those of the DC+DPRF (P=.73), DC+WPP (P=.106), and DC+WCF (P=.551) groups but were statistically different from DC+RF (P=.028) and I7 groups (P<.001). Use of a gray card was significant when a ring flash (P=.008) or the iPhone (P=.023) were used but not statistically significant for the other groups (P>.05). CONCLUSIONS: The use of a cross-polarizing filter results in more color-standardized photographs, while the ring flash system and the iPhone 7 result in less standardized photographs. The gray reference card had a significant effect when a ring flash system or iPhone 7 was used.


Assuntos
Cor/normas , Fotografia Dentária/instrumentação , Pigmentação em Prótese , Dente/anatomia & histologia , Adulto , Humanos , Fotografia Dentária/normas
15.
IEEE Trans Biomed Eng ; 66(4): 1026-1033, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30130173

RESUMO

OBJECTIVE: In dentistry, dentists perform many treatments with a few visually magnified information. About deep area of root canals, it commonly relies on exploration carried out with the fingers of the dentist, because the root canal entrance is very small to be observed. In clinical practice, the intraoral camera and endoscopic systems are separate devices, and there are no sensors to capture both pictures of the whole tooth and those inside the root canal. Objective of this research is to combine the intraoral camera and endoscopic system facilitating to use clinical practice. METHODS: We propose an endoscopic system based on the thin image fiber, SOPROLIFE intraoral camera as an image sensor, and a new adaptor to connect the two parts. We observed resolution charts with 50, 25, 10, and 5 line pairs (LP)/mm patterns. The acquired images are processed to both remove fixed-pattern noise using robust principal component analysis and enhance contrast. RESULTS: The acquired images containing all LP/mm patterns were clear and showed higher contrast after processing. Visibility of the processed images is 1.7, 1.6, 2.2, and 1.9 times higher than that of the raw images for 50, 25, 10, and 5 LP/mm patterns, respectively. CONCLUSION: Our fabricated endoscopic system based on the SOPROLIFE intraoral camera could observe 50, 25, 10, and 5 LP/mm patterns. After image processing, the noise was reduced, and high-contrast images were obtained. SIGNIFICANCE: This system can be considered as a further step toward facilitating noninvasive and contactless systems in clinical practice.


Assuntos
Endoscopia/métodos , Processamento de Imagem Assistida por Computador/métodos , Fotografia Dentária/métodos , Dente/diagnóstico por imagem , Humanos , Interpretação de Imagem Assistida por Computador , Dente/cirurgia , Gravação em Vídeo
16.
J Esthet Restor Dent ; 31(1): 64-71, 2019 01.
Artigo em Inglês | MEDLINE | ID: mdl-30381885

RESUMO

OBJECTIVE: The aims of this study were (1) to investigate how relevant intraoral photographs are to contemporary orthodontic diagnosis and (2) to assess orthodontists' ability to accurately diagnose angle classification and dental midlines using standardized intraoral photographs. METHODS: Study participants were orthodontists who completed a survey regarding photography protocols and their use of intraoral photographs for diagnosis. Each participant was randomized to complete 1 visual diagnostic task regarding either angle classification or midlines. Accuracy was compared across groups and camera angulations. RESULTS: In all, 80% of 192 respondents reported using photographs and clinic notes to plan orthodontic treatment; 50% also included dental casts. For the angle task, accuracy judging molar and canine classification was 79.9% and 51.3%, respectively with ideal standardized photographs. As camera angulation deviated, accuracy decreased significantly (P < 0.0001). For the midline task, accuracy judging the direction of deviation decreased with a small camera angulation change yet increased with a large change (P < 0.001). CONCLUSIONS: When using ideal intraoral photographs alone to diagnose angle classification and midline relationships, accuracy is not likely to be greater than 80%. As camera angulation becomes less ideal, by 15 degrees when judging angle classification or 4 degrees when judging midlines, accuracy is likely to significantly decrease. CLINICAL SIGNIFICANCE: For the clinician who wants to have the most accurate and complete records, our results suggest that intra-oral photos alone may not be adequate when it comes to judging occlusal relationships such as angle classification and esthetic parameters like midlines. When using ideal intraoral photographs to diagnose angle classification and midline relationships, accuracy is not likely to be greater than 80%. As camera angulation becomes less ideal, by as little as 15 degrees when judging angle classification or 4 degrees when judging midlines, accuracy is likely to decrease significantly. Understanding these limitations will allow clinicians to improve both their clinical photography technique and their diagnostic skills.


Assuntos
Má Oclusão , Fotografia Dentária , Dente , Humanos , Dente Molar , Fotografação
17.
J Prosthodont ; 28(2): e469-e472, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29280304

RESUMO

PURPOSE: To assess the different forms of maxillary central incisors (MCI) and determine their association with the shape of the face for men and women. MATERIALS AND METHODS: A total of 200 subjects (100 women, 100 men) aged between 18 and 30 years with healthy dentition were randomly selected from K.L.E. V.K Institute of Dental Sciences, Belagavi, India. Two standardized photographs (portrait and shape of the MCI) were taken for each subject and opened in AutoCAD 2009 software that was used to prepare technical drawings of face and tooth forms. The dental ratios (extent of line TA: extent of line TB) obtained after the tracings, were classified as tapered (≤0.61), ovoid (>0.61 and <0.69), or square (≥0.70). This classification was used to relate tooth form to the shape of the face and compare the form of MCI between men and women. Association between the shape of the MCI and the face was determined by Chi-square test using R 3.3.1 software. RESULTS: The most prevalent tooth form among the subjects was ovoid (women, 32%; men, 31%) followed by tapered (women, 13%; men, 16%). The least prevalent shape was square (women, 5%; men, 3%). The most prevalent face shape was tapered (women, 34%; men, 25%) followed by ovoid (women, 15%; men, 22%) and the least prevalent was square (women, 1%; men, 3%). An association between face shape and tooth form was statistically not significant. CONCLUSION: The most prevalent tooth form in both men and women was ovoid, and the least prevalent was square. The association between face shape and tooth form was not significant and did not abide by William's "Law of Harmony." However, there was an association between face shape and gender.


Assuntos
Face/anatomia & histologia , Incisivo/anatomia & histologia , Maxila/anatomia & histologia , Odontometria/métodos , Fotografia Dentária , Adolescente , Adulto , Estética Dentária , Feminino , Humanos , Índia , Masculino , Software
18.
Clin Oral Investig ; 23(5): 2383-2387, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30302610

RESUMO

OBJECTIVES: To determine the detectability of the intra-oral photographic method in comparison to the baseline, comprehensive dental examination (CDE), in children when performed by different levels of dental practitioners. MATERIALS AND METHODS: As part of a quality assurance program, intra-oral photographs were obtained from 77 patients (2-18 years) as part of a CDE before undertaking dental treatment under general anaesthesia. A DSLR camera was utilised to acquire images which were subsequently uploaded to a cloud-based server. The baseline for each participant was established during the CDE, utilising both visual and radiographic examination, which was then compared to the assessment made by a mid-level dental practitioners (MLDP). The evaluation was based on utilising an odontogram where the teeth were charted either as decayed or filled. RESULTS: Specificity (95%) was higher than sensitivity (61.5%) when comparing the photographic assessment with the benchmark CDE assessment. The inter-rater reliability between the two methods of assessment was substantial, with a kappa score of 0.62. The photographic assessment method underestimated the decayed and filled teeth, as observed by the caries experience (dft/DFT scores) (CDE = 7.01 vs. photographic assessment = 5.22). There were lower levels of diagnostic detection in the posterior teeth as compared to the anterior teeth assessments. CONCLUSIONS: Although the CDE is still considered to be the gold-standard, this study found that the photographic caries assessment by MLDP produced an acceptable diagnostic level of detection particularly for the anterior teeth. CLINICAL RELEVANCE: The photographic method could offer a potential cost-saving and user-friendly screening.


Assuntos
Cárie Dentária/diagnóstico , Diagnóstico Bucal/normas , Fotografia Dentária/normas , Adolescente , Benchmarking , Criança , Pré-Escolar , Humanos , Exame Físico , Reprodutibilidade dos Testes , Estudos Retrospectivos , Sensibilidade e Especificidade , Telemedicina
19.
Am J Phys Anthropol ; 168(3): 438-447, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30582632

RESUMO

OBJECTIVES: To investigate the variation in dental nonmetric traits and to evaluate the utility of this variation for inferring genetic ancestry proportions in a sample of admixed Latin Americans. MATERIALS AND METHODS: We characterized a sample from Colombia (N = 477) for 34 dental traits and obtained estimates of individual Native American, European, and African ancestry using genome-wide SNP data. We tested for correlation between dental traits, genetic ancestry, age, and sex. We carried out a biodistance analysis between the Colombian sample and reference continental population samples using the mean measure of divergence statistic calculated from dental trait frequencies. We evaluated the inference of genetic ancestry from dental traits using a regression approach (with 10-fold cross-validation) as well as by testing the correlation between estimates of ancestry obtained from genetic and dental data. RESULTS: Latin Americans show intermediate dental trait frequencies when compared to Native Americans, Europeans, and Africans. Significant correlations were observed for several dental traits, genetic ancestry, age, and sex. The biodistance analysis displayed a closer relationship of Colombians to Europeans than to Native Americans and Africans. Mean ancestry estimates obtained from the dental data are similar to the genetic estimates (Native American: 32% vs. 28%, European: 59% vs. 63%, and African: 9% vs. 9%, respectively). However, dental features provided low predictive power for genetic ancestry of individuals in both approaches tested (R2 < 5% for all genetic ancestries across methods). DISCUSSION: The frequency of dental traits in Latin Americans reflects their admixed Native American, European and African ancestry and can provide reasonable average estimates of genetic ancestry. However, the accuracy of individual genetic ancestry estimates is relatively low, probably influenced by the continental differentiation of dental traits, their genetic architecture, and the distribution of genetic ancestry in the individuals examined.


Assuntos
Grupos de Populações Continentais , Hispano-Americanos/genética , Dente/anatomia & histologia , Adolescente , Adulto , Antropologia Física , Grupos de Populações Continentais/genética , Grupos de Populações Continentais/estatística & dados numéricos , Feminino , Genética Populacional , Hispano-Americanos/estatística & dados numéricos , Humanos , Masculino , Fotografia Dentária , Adulto Jovem
20.
Artigo em Inglês | MEDLINE | ID: mdl-31888225

RESUMO

AIMS: The study aims to assess the accuracy of digital planning in dentistry, evaluating the characteristics of different intraoral 3D scanners and comparing it with traditional imaging 2D recording methods. Specifically, using computer aided design (CAD) software and measuring inside CAD software, authors want to verify the reliability of different models obtained with different techniques and machines. METHODS: 12 patients that needed aesthetic restorative treatment were enrolled in the study. All the patients underwent recording data of the height and width dental elements 1.1, 1.2, and 1.3 size using different technologies and comparing 2D with 3D methods. A T test was then applied in order to verify whether there was a statistically significant difference between the measurements obtained, comparing the different tools data (Emerald, TRIOS, Photogrammetry and DSS (Digital Smile System)) with the reference values. RESULTS: No significant differences emerged in the measurements made with the different scanners (Trios 3Shape ®, Planmeca Emerald ®) and photogrammetry. Therefore, what should be underlined regarding the 2D measurements is the speed and simplicity compared to all 3D techniques, so this work can help to better define the field of application and the limits connected to 2D techniques, giving a good window of the technique. CONCLUSIONS: The low number of patients is not sufficient to provide statistically significant results, but the digital planning future prospects seem to be promising. This study results highlighted how a photogrammetric scanner for dental arches would only have a much smaller shooting field size and greater accuracy. Despite these considerations, the photogrammetric facial scanner provided excellent results for the measurement of individual teeth, showing a great versatility of use.


Assuntos
Desenho Assistido por Computador/normas , Arco Dental/diagnóstico por imagem , Técnica de Moldagem Odontológica/normas , Imageamento Tridimensional/normas , Fotografia Dentária/normas , Prostodontia/métodos , Realidade Virtual , Humanos , Reprodutibilidade dos Testes , Software/normas
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA