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Purpose: The aim of this study was to objectively detect simulated tooth ankylosis using a novel method involving cone-beam computed tomography (CBCT). Materials and Methods: Tooth ankylosis was simulated in single-rooted human permanent teeth, and CBCT scans were acquired at different current levels (5, 6.3, and 8 mA) and voxel sizes (0.08, 0.125, and 0.2). In axial reconstructions, a line of interest was perpendicularly placed over the periodontal ligament space of 21 ankylosed and 21 non-ankylosed regions, and the CBCT grey values of all voxels along the line of interest were plotted against their corresponding X-coordinates through a line graph to generate a profile. The image contrast was increased by 30% and 60% and the profile assessment was repeated. The internal area of the resulting parabolas was obtained from all images and compared between ankylosed and non-ankylosed regions under different contrast enhancement conditions, voxel sizes, and mA levels using multi-way analysis of variance with the Tukey post hoc test (α=0.05). Results: The internal area of the parabolas of all non-ankylosed regions was significantly higher than that of the ankylosed regions (P<0.05). Contrast enhancement led to a significantly greater internal area of the parabolas of non-ankylosed regions (P<0.05). Overall, voxel size and mA did not significantly influence the internal area of the parabolas (P>0.05). Conclusion: The proposed novel method revealed a relevant degree of applicability in the detection of simulated tooth ankylosis; increased image contrast led to greater detectability.

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Aim: To assess the reliability and validity of morphometric features on 3D digital models produced by scanning maxillary dental casts of Malaysian Malay subjects. Methods: Dental casts of 20 subjects were scanned using a 3D laser scanner (Next Engine Inc., Santa Monica, California, USA). The palatal rugae morphometric features were assessed on the resulting 3D models using 3-Matic Research 9.0 software (Materialise NV, Heverlee, Belgium). The assessments were repeated by the first and second authors to assess the intra- and interexaminer reliability, respectively. Rugae morphometric features were also evaluated on the conventional plaster models to assess the validity of the 3D method. Results: Kappa values of the validity ranged from 0.807 to 0.922 for rugae shape, size category and direction. The intraclass correlation coefficient (ICC) for rugae number validity was 0.979. For intra-examiner reliability, kappa values ranged from 0.716-1.000 for rugae shape, size category and direction. The ICC for rugae number intra-examiner reliability was 0.949. Kappa values of interexaminer reliability for rugae shape, size category and direction were 0.723-885, while the ICC of rugae number was 0.896. Conclusion: Palatal rugae analyses on 3D digital models scanned by the 3D Next Engine laser scanner using 3-Matic Research 9.0 software are valid and reliable

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Aim: To evaluate the accuracy and the validity of orthodontic diagnostic measurements, as well as virtual tooth transformations using a generic open access 3D software compared to OrthoAnalyzer (3Shape) software; which was previously tested and proven for accuracy. Methods: 40 maxillary and mandibular single arch study models were duplicated and scanned using 3Shape laser scanner. The files were imported into the generic and OrthoAnalyzer software programs; where linear measurements were taken twice to investigate the accuracy of the program. To test the accuracy of the program format, they were printed, rescanned and imported into OrthAnalyzer. Finally, to investigate the accuracy of editing capabilities, linear and angular transformation procedures were performed, superimposed and printed to be rescanned and imported to OrthoAnalyzer for comparison. Results: There was no statistically significant difference between the two groups using the two software programs regarding the accuracy of the linear measurements (p>0.05). There was no statistically significant difference between the different formats among all the measurements, (p>0.05). The editing capabilities also showed no statistically significant difference (p>0.05). Conclusion: The generic 3D software (Meshmixer) was valid and accurate in cast measurements and linear and angular editing procedures. It can be used for orthodontic diagnosis and treatment planning without added costs

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Abstract This study evaluated the Reciproc R25 and Pro-R 25 instruments in unused condition, after one and a second use in endodontic retreatment employing a noncontact 3D light interferometer profiler, scanning electron microscopy (SEM) and cyclic fatigue tests. Twenty single-root teeth were instrumented with Reciproc R25 and filled with gutta-percha and sealer. A 3D profiler with a 20x objective using the Mx™ software was used to evaluate the cutting blade surfaces of Reciproc R25 and Pro-R 25 (n=5 per group) in unused condition, after the first and second uses in retreatment procedures. After retreatment, SEM was used to evaluate the topographic features of the used instruments. Cyclic fatigue tests were performed to compare new to used instruments. One-way ANOVA followed by Tukey test was used to compare the tested instruments before and after the first and second uses. Student t-test was used to compare the different instruments and for cyclic fatigue evaluation. No significant differences were observed in the cutting blade surfaces of Reciproc and Pro-R before and after one and two uses (p>0.05). Reciproc without use showed higher Sa and Sq when compared to Pro-R without use (p<0.05). No differences were observed between Reciproc and Pro-R after one and two uses (p>0.05). New and unused Reciproc showed longer time to fracture than Pro-R instruments (p<0.05), and only Pro-R showed differences between new and used instruments (p<0.05). Retreatment procedures with Reciproc and Pro-R did not change the surface topography of instruments. Reciproc had greater resistance to cyclic fatigue compared with Pro-R.

Resumo Este estudo avaliou os instrumentos Reciproc R25 e Pro-R 25 sem uso, após um primeiro e um segundo uso em retratamento endodôntico com perfilômetro 3D por interferometria de luz sem contato, microscópio eletrônico de varredura (MEV) e testes de fadiga cíclica. Vinte dentes unirradiculares foram instrumentados com Reciproc R25 e obturados com guta-percha e cimento endodôntico. Um perfilômetro 3D com uma objetiva 20x usando o software Mx ™ foi usado para avaliar as superfícies da lâmina de corte do Reciproc e Pro-R (n = 5 por grupo) na condição sem uso, após o primeiro e após um segundo uso em procedimentos de retratamento. Após retratamento, o MEV foi usado para avaliar as características topográficas dos instrumentos utilizados. Testes de fadiga cíclica foram realizados para comparar instrumentos novos com instrumentos usados. O teste One-way ANOVA seguido pelo teste de Tukey foi usado para comparar os instrumentos testados nos diferentes estágios. Para comparar os diferentes instrumentos e para avaliação de fadiga cílcica, foi utilizado o Student t-test. Não foram observadas diferenças estatisticamente significantes nas superfícies das lâminas de corte dos instrumentos Reciproc e Pro-R antes e após um e dois usos (p> 0,05). O Reciproc na condição sem uso apresentou maior Sa e Sq quando comparado ao Pro-R (p <0,05). Não foram observadas diferenças entre Reciproc e Pro-R após um e dois usos (p> 0,05). O Reciproc sem uso apresentou maior tempo de fratura do que os instrumentos Pro-R (p<0,05), e apenas o Pro-R apresentou diferenças entre instrumentos novos e usados (p<0,05). Os procedimentos de retratamento com Reciproc e Pro-R não alteraram a topografia da superfície dos instrumentos. Reciproc apresentou maior resistência à fadiga cíclica em comparação com o Pro-R.

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OBJECTIVE: The present prospective clinical study aimed to investigate the effects of rapid maxillary expansion on the airway, correlating airway volumes obtained on multi-slice computed tomography and polysomnography assessment of oxygen saturation and apnea/hypopnea index. METHODS: Twenty-four patients (11 with obstructive sleep apnea and 13 with residual snoring, mean age 10.0 (1.8), were enrolled in the study. Each patient underwent multislice computed tomography and nocturnal polysomnography before rapid maxillary expansion and after removal of maxillary expansion after six months. Airway regions were segmented, and volumes were computed. RESULTS: The increase in oropharyngeal volume was significant in both groups. Oxygen saturation and apnea/hypopnea index were not statistically significant. No correlation was found between total airway volume, oxygen saturation, and apnea/hypopnea index changes between the time points examined. CONCLUSIONS: This study showed that when rapid maxillary expansion is performed in individuals with sleep-disordered breathing, there were statistically significant differences in oropharyngeal volume between pre- and post-rapid maxillary expansion, but there was no correlation between oxygen saturation values and oropharyngeal volume increase. LEVEL OF EVIDENCE: The article is classified as Evidence Level 3 (Three).

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A incorporação do chamado fluxo digital já é uma realidade na odontologia clínica, e suas vantagens podem ser incorporadas à Odontologia Forense. Particularmente, os escâneres, ou scanners intraorais (SIOs) geram modelos tridimensionais digitais em forma de arquivo que podem ser armazenados, analisados e comparados utilizando aplicativos próprios. Trata-se de técnica que obtém registros com agilidade e precisão, onde os dados podem ser obtidos, se necessário, no próprio local do encontro, como por exemplo, nos acidentes coletivos. O objetivo deste estudo é revisar a literatura sobre as aplicações mais recentes dos SIOs e dos arquivos por eles gerados na Odontologia Forense. Onze trabalhos foram selecionados para revisão. Os estudos mostram que as técnicas existentes se beneficiam do uso dos SIOs e dos modelos digitais, e que medidas exatas e precisas podem ser feitas digitalmente. Algoritmos de comparação e inteligências artificiais podem ser de grande contribuição para o processo de identificação, diminuindo a quantidade de suspeitos a serem comparados com uma determinada amostra e identificando restaurações metálicas. A técnica digital permite a diferenciação de gêmeos monozigóticos por análise das rugosidades palatinas. A identificação humana baseada apenas na análise física ou digital de marcas de mordida não é recomendada, pois é sujeita a viés do examinador

The digital workflow is already ubiquitous in the clinical dental practice, and its advantages can be incorporated to the forensic odontology. Intraoral scanners generate digital casts that can be stored, analyzed and compared using the proper software. It's a technique that swiftly and precisely registers the object of interest, and can be used on-site, if needed, in mass disasters, for example. The goal of this article is to review the most recent applications of the intraoral scanners and the digital files generated by them in the forensic odontology practice. Eleven articles were selected for revision. The studies demonstrate that the existing identification techniques can benefit from the use of intraoral scanners and digital casts, and measures can be taken digitally with precision and accuracy. Automated comparison algorithms and artificial intelligence models can be of great contribution to the identification process, decreasing the number of suspects that could match a sample and identifying metallic restorations. Digital analysis of palatal rugae was used successfully to identify monozygotic twins. Human identification relying solely on bitemark analysis, even with digital techniques, is not recommended, due to examiner bias

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OBJECTIVES: A systematic review was performed to analyze the current evidence on three-dimensional (3D) computed tomography (CT) superimposition protocols used to assess dentomaxillofacial changes after orthognathic and orthofacial surgery. Accuracy, reproducibility, and efficiency were evaluated. METHODS: The search was divided into Main Search (PubMed, EMBASE, Cochrane Library, LILACS, and SciELO), Grey Literature search (Google Scholar and Open Grey), and Manual search. Thirteen studies were included. Of these, 10 reported data on accuracy, 10 on reproducibility and five on efficiency. Seven proposed or evaluated methods of voxel-based superimposition, three focused on the surface-based technique, one compared surface- and voxel-based superimposition protocols, one used the maximum mutual information algorithm, and one described a landmark-based superimposition method. Cone-beam computed tomography (CBCT) was the most common imaging technique, being used in 10 studies. RESULTS: The accuracy of most methods was high, showing mean differences smaller than voxels' dimensions, ranging between 0.05 and 1.76 mm for translational accuracy, and 0.10-1.09° for rotational accuracy. The overall reproducibility was considered good as demonstrated by the small mean error (range: 0.01-0.26 mm) and high correlation coefficients (range: 0.53-1.00). Timing to complete virtual superimposition techniques ranged between a few seconds up to 40 min. CONCLUSIONS: Voxel-based superimposition protocols presented the highest accuracy and reproducibility. Moreover, superimposition protocols that used automated processes and involved only one software were the most efficient.

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A necessidade de examinar o coração com uma ferramenta tridimensional não é nova na ecocardiografia. O órgão complexo e dinâmico em estudo sempre exigiu o entendimento em três dimensões e em tempo real. Sem o recurso, o examinador precisa transformar as imagens em bidimensional para uma compreensão de volume que exige complexa interação de conhecimentos e aproximações. A invenção da tridimensão já contabiliza três décadas, e seu aprimoramento levou a produtos comerciais no início do século. Estudos demonstram, no mínimo, equivalência da tridimensão com ganhos no manuseio do tempo necessário. Utilizamos as modalidades Tri Plano na rotina com ganho de tempo e menor estresse do membro superior do examinador. A tridimensão pode responder perguntas mais complexas e auxilia em nossa abordagem mais geométrica da contração, sendo o espessamento analisado em segundo plano.(AU)

The need to examine the heart using a three-dimensional (3D) tool is not new. This complex and dynamic organ has always required 3D and real-time understanding. Without this feature, the examiner has to transform two-dimensional images to understand its volume, which requires complex knowledge and approximation interactions. Echocardiography was invented three decades ago, and its improvements resulted in commercial products at the beginning of the century. Some studies demonstrate 3D equivalence with gains in handling the necessary time. We use triplane modalities in our routine, with time gain and less stress on the examiner's upper limb. Thus, 3D examinations can answer more complex questions and provide a more geometric approach to contraction, with thickening being analyzed in the background. (AU)

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ABSTRACT Introduction: Research in Orthodontics and Oral Surgery has been relying on three-dimensional (3D) models to evaluate treatment results with displacement color map techniques, even though it has important limitations. Objectives: This study proposed a method of tracking translational movements of 3D objects to evaluate displacements in surfaces with no shape modification. Methods: Cone Beam Computed Tomography (CBCT) data of ten patients were imported to the Dolphin software. A hypothetical virtual surgical plan (randomly defined) was developed in the software and afterwards verified using the proposed method. All the procedures were carried out by two evaluators, in two different time-points, with a 15-day interval. ITK-Snap software was used to generate high quality STL models. Centroid points were automatically generated and their coordinates were compared to confirm if they represented the known displacements simulated. The paired t-test and the Bland-Altman plots were used, as well as the intraclass correlation coefficient. Results: Interexaminers and intra-examiner tests showed excellent reliability of the method, with mean displacement measurement error values under 0.1mm. The paired t-test did not show any statistically significant differences. Conclusion: The method showed excellent reliability to track the simulated translational displacements of bone segments.

RESUMO Introdução: Grande parte das pesquisas em Ortodontia e Cirurgia Oral tem utilizado modelos tridimensionais e realizado avaliações por meio de mapa de cores de deslocamento, apesar das limitações existentes. Objetivo: O presente estudo teve como objetivo propor um método de rastreamento de movimentos translacionais de objetos 3D, para avaliar deslocamentos em superfícies sem modificação de forma. Métodos: Dez adultos que seriam submetidos à cirurgia ortognática tiveram suas tomografias computadorizadas de feixe cônico pré-cirúrgicas importadas para o software Dolphin. Um plano cirúrgico virtual hipotético com deslocamentos conhecidos foi desenvolvido e posteriormente verificado pelo método proposto. Todos os procedimentos foram realizados por dois avaliadores, em dois momentos diferentes, com intervalo de 15 dias. O software ITK-Snap foi usado para gerar modelos STL de alta qualidade dos ossos do paciente. Os pontos do centroide foram gerados automaticamente, e suas coordenadas foram comparadas, para confirmar se representavam os deslocamentos conhecidos simulados. Para análise estatística, foram usados teste t pareado, coeficiente de correlação intraclasse e os gráficos de Bland-Altman. Resultados: O teste inter e intraexaminadores mostrou boa confiabilidade do método, com valores médios abaixo de 0,1mm para os erros de medida de deslocamento. Conclusão: O método mostrou boa confiabilidade para avaliar o deslocamento de segmentos ósseos após cirurgia ortognática, devendo ser aplicado como uma ferramenta completa de avaliação verdadeiramente tridimensional.

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Abstract Oral cleft surgical repairs are performed using different techniques worldwide. Objective To evaluate and compare the development of the dental arches of children with unilateral cleft lip and palate before and after the primary surgeries performed with different techniques at the first months and six years of life. Methodology This is a retrospective longitudinal study. The sample comprised 56 dental casts divided int the following groups: Group 1 (G1) - cheiloplasty (Millard technique) at three months and one-step palatoplasty (von Langenbeck technique) at 12 months; and Group 2 (G2) - cheiloplasty (Millard technique) and two-step palatoplasty: anterior hard palate closure (Hans Pichler technique) at three months and posterior soft palate closure (Sommerlad technique) at 12 months. The digitized dental casts were evaluated at three months - pre-surgical (T1) and six years of life- post-surgical (T2). The following linear measurements were analyzed: intercanine (C-C'), intertuberosity (T-T') distances; anterior dental arch (I-CC'), anterior intersegment (I-C'), and total arch (I-TT') lengths. The palate area was also measured. Parametric and non-parametric tests were applied (p<0.05). Results In G1, the intragroup comparison showed statistically significant smaller I-CC' and I-C' at T2 (p=0.001 and p<0.001, respectively), while T-T', I-TT', and area comparisons were significantly greater (p<0.001, p=0.002, and p<0.001, respectively). In G2, the intragroup comparison exhibited statistically significant smaller C-C' and I-C' at T2 (p=0.004, for both), whereas T-T', I-TT' and area comparisons were significantly greater (p<0.001, p=0.004, and p<0.001, respectively). At T2, the intergroup analysis revealed that G1 had a statistically significant smaller I-CC' (p=0.014). The analysis of the intergroup differences (∆=T2-T1) showed that G1 had a statistically smaller I-CC' (p=0.043). Conclusion The two-step palatoplasty showed a more favorable prognosis for the maxillary growth than one-step palatoplasty in children with oral clefts.

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RESUMEN Introducción: la enfermedad por SARS-Cov-2 refuerza la importancia del uso de las nuevas tecnologías de la información y las comunicaciones en función del desarrollo e implementación de sistemas de inteligencia artificial que favorecen el diagnóstico. Objetivo: describir la posibilidad del uso de la inteligencia artificial como una herramienta en la imagenología para los pacientes positivos a la COVID-19. Métodos: se realizó una revisión de fuentes bibliográficas en Infomed, SciELO, PubMed y Google Académico, comprendidas en los años 2015 al 2020 con el uso de palabras claves: coronavirus, COVID-19, neumonía, radiografía e inteligencia artificial. Se seleccionaron 28 documentos por su pertinencia en el estudio. Desarrollo: la creación de sistemas de inteligencia artificial que ayuden al diagnóstico médico requiere un enfoque interprofesional de la ciencia y constituye una de las líneas de trabajo en Cuba durante la pandemia. Una condición indispensable para la introducción de la inteligencia artificial en el diagnóstico radiológico es la capacitación que deben recibir los médicos para interactuar con ella, a través de un proceso formativo que incluya una evaluación y explicación de la calidad de los datos asociada tanto al aprendizaje como a las nuevas predicciones. Conclusiones: la utilización de inteligencia artificial mejorará el rendimiento del radiólogo para distinguir la COVID-19; la integración de estas tecnologías en el flujo de trabajo clínico de rutina puede ayudar a los radiólogos a diagnosticar con precisión.

ABSTRACT Introduction: SARS-Cov-2 disease reinforces the importance of the use of new information and communication technologies based on the development and implementation of artificial intelligence systems that favor diagnosis. Objective: to describe the possibility of using artificial intelligence as a tool in imaging for COVID-19 positive patients. Methods: a review of bibliographic sources was carried out in Infomed, SciELO, PubMed and Google Scholar, from 2015 to 2020 with the use of keywords: coronavirus, COVID-19, pneumonia, radiography and artificial intelligence. 28 documents were selected for their relevance in the study. Development: the creation of artificial intelligence systems that help medical diagnosis requires an interprofessional approach to science and constitutes one of the lines of work in Cuba during the pandemic. An essential condition for the introduction of artificial intelligence in radiological diagnosis is the training that doctors must receive to interact with it, through a training process that includes an evaluation and explanation of the quality of the data associated with both learning and to new predictions. Conclusions: the use of artificial intelligence will improve the radiologist's performance to distinguish COVID-19; integrating these technologies into routine clinical workflow can help radiologists diagnose accurately.

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Aim: Evaluation of the reliability of 3D computed tomography (3D-CT) in the diagnosis of mandibular fractures. Methods: A cross-sectional, quantitative and qualitative study was carried out, through the application of a questionnaire for 70 professionals in the area of Oral and Maxillofacial Surgery and Radiology. 3D-CT images of mandibular fractures were delivered to the interviewees along with a questionnaire. Participants answered about the number of traces, the region and the type of fracture. The correct diagnosis, that is, the expected answer, was based on the reports of a specialist in oral and maxillofacial radiology after viewing the images in the axial, sagittal and coronal sections. The resulting data from the interviewees was compared with the expected answer and then, the data was analyzed statistically. Results: In the sample 56.9% were between 22 and 30 years old, 52.8% were oral and maxillofacial surgeons (OMF), 34.7% were residents in OMF surgery and 12.5% OMF radiologists. Each professional answered 15 questions (related to five patients) and 50.8% of the total of these was answered correctly. Specialists in Oral and Maxillofacial Surgery and Traumatology correctly answered 53.9%. Interviewees with experience between 6 and 10 years correctly answered 58.2%. In identifying fracture traces, 46.1% of the questions were answered correctly. In terms of location, 5.6% of interviewees answered wrongly while 14.2% answered wrongly regarding classification. Conclusion: 3D computed tomography did not prove to be a reliable image for diagnosing mandibular fractures when used alone. This made necessary an association with axial, sagittal and coronal tomographic sections

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Resumen En los últimos años, la tecnología y la medicina han podido complementarse para la optimización de tiempo, conocimientos y recursos, aumentando la posibilidad de tratamientos personalizados en más pacientes. A nivel maxilofacial, la reconstrucción de defectos mandibulares se ha visto en la necesidad de progresar sus técnicas debido a la serie de orígenes que afectan el hueso mandibular de manera drástica, como lesiones traumáticas, cáncer, infecciones, enfermedad congénita u otros, y las innumerables consecuencias tanto estéticas como funcionales, restringiendo significativamente la calidad de vida. El objetivo de este artículo es revisar conceptos básicos del uso de tecnologías de impresión 3D en la reconstrucción mandibular. La impresión 3D ha aparecido en diversos ámbitos, siendo en el área de la medicina, un aporte fundamental para la creación de formas anatómicas de alta precisión con el que se pueden diseñar objetos con reproducción de detalles de manera rápida, luego de una serie de pasos que incluyen la obtención de una imagen radiográfica, uso de software y reparación de archivos, y la obtención de un modelo tridimensional. Los últimos estudios han validado el uso de impresiones 3D para una reconstrucción mandibular, con claros beneficios de costos y calidad de detalles. Es necesario crear un enfoque en las técnicas quirúrgicas utilizadas con un objeto impreso tridimensionalmente y un análisis post operatorio de los pacientes sometidos a estos procedimientos más allá de los detalles técnicos.

Abstract In recent years, technology and medicine have been able to complement each other to optimize time, knowledge and resources, increasing the possibility of personalized treatments in more patients. At the maxillofacial level, the reconstruction of mandibular defects has seen the need to progress its techniques due to the series of origins that drastically affect the mandibular bone, such as traumatic injuries, cancer, infections, congenital disease or others, and the innumerable both aesthetic and functional consequences, significantly restricting the quality of life. The objective of this article is to review basic concepts of the use of 3D printing technologies in mandibular reconstruction. 3D printing has appeared in various fields, being in the area of medicine, a fundamental contribution to the creation of high-precision anatomical shapes with which objects with reproduction of details can be designed quickly, after a series of steps which include obtaining a radiographic image, use of software and file repair, and obtaining a three-dimensional model. The latest studies have validated the use of 3D impressions for mandibular reconstruction, with clear benefits in cost and quality of details. It is necessary to create a focus on the surgical techniques used with a three-dimensional printed object and a post-operative analysis of the patients undergoing these procedures beyond the technical details.

Resumo Nos últimos anos, tecnologia e medicina têm se complementado para otimizar tempo, conhecimento e recursos, aumentando a possibilidade de tratamentos personalizados em mais pacientes. No nível maxilofacial, a reconstrução dos defeitos mandibulares tem visto a necessidade de progredir em suas técnicas devido à série de origens que afetam drasticamente o osso mandibular, como lesões traumáticas, câncer, infecções, doenças congênitas ou outras, e as inúmeras ambas estéticas. e consequências funcionais, restringindo significativamente a qualidade de vida. O objetivo deste artigo é revisar os conceitos básicos do uso das tecnologias de impressão 3D na reconstrução mandibular. A impressão 3D tem surgido em vários campos, sendo na área da medicina uma contribuição fundamental para a criação de formas anatômicas de alta precisão com as quais objetos com reprodução de detalhes podem ser desenhados rapidamente, após uma série de etapas que incluem a obtenção de uma imagem radiográfica, uso de software e reparo de arquivos e obtenção de um modelo tridimensional. Os estudos mais recentes têm validado o uso de impressões 3D para reconstruções mandibulares, com claros benefícios em custo e qualidade de detalhes. É necessário criar um foco nas técnicas cirúrgicas utilizadas com um objeto impresso tridimensional e uma análise pós-operatória dos pacientes submetidos a esses procedimentos para além dos detalhes técnicos.

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PURPOSE: Using images in the facial image comparison process poses a challenge for forensic experts due to limitations such as the presence of facial expressions. The aims of this study were to analyze how morphometric changes in the face during a spontaneous smile influence the facial image comparison process and to evaluate the reproducibility of measurements obtained by digital stereophotogrammetry in these situations. MATERIALS AND METHODS: Three examiners used digital stereophotogrammetry to obtain 3-dimensional images of the faces of 10 female participants (aged between 23 and 45 years). Photographs of the participants' faces were captured with their faces at rest (group 1) and with a spontaneous smile (group 2), resulting in a total of 60 3-dimensional images. The digital stereophotogrammetry device obtained the images with a 3.5-ms capture time, which prevented undesirable movements of the participants. Linear measurements between facial landmarks were made, in units of millimeters, and the data were subjected to multivariate and univariate statistical analyses using Pirouette® version 4.5 (InfoMetrix Inc., Woodinville, WA, USA) and Microsoft Excel® (Microsoft Corp., Redmond, WA, USA), respectively. RESULTS: The measurements that most strongly influenced the separation of the groups were related to the labial/buccal region. In general, the data showed low standard deviations, which differed by less than 10% from the measured mean values, demonstrating that the digital stereophotogrammetry technique was reproducible. CONCLUSION: The impact of spontaneous smiles on the facial image comparison process should be considered, and digital stereophotogrammetry provided good reproducibility.

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ABSTRACT Introduction: Timely assessment and correction of post-stroke hemiplegia gait, to improve walking ability, has become an urgent problem for patients with hemiplegia. Objective: In order to improve the effect of exercise rehabilitation and tensile strength testing, a three-dimensional gait analysis method was proposed. Methods: The kinematics, dynamics, ground reaction force and surface EMG of lower limbs were measured by VICON (Nexus 1.8.5), a three-dimensional gait analysis system, and Noraxon, a wireless surface EMG, while 13 healthy subjects walked. The intra-group correlation coefficient (ICC) and standard error of measurement (SEM) were used to compare the relative and absolute reliability of the two test results. Results: the re-testability ICC was 78~0.96, the standard error SEM% of kinematics parameters was 4.18~15.6, and the SEM% of dynamic parameters was 3.31~21.82. The SEM% of ground reaction force was 1.70~16.67, and the SEM% of surface EMG signal was 8.00~11.11. Conclusions: 3D gait analysis can improve the effect of exercise rehabilitation and tensile strength testing, and has good retesting reliability. Level of evidence II; Therapeutic studies - investigation of treatment results.

RESUMO Introdução: A avaliação e correção oportunas da marcha hemiplégica pós-derrame para a recuperação da habilidade de caminhar tem se tornado um problema premente para pacientes com hemiplegia. Objetivo: Um método de análise tridimensional de marcha foi proposto para melhorar o efeito de exercícios de reabilitação e de testes de força tensil. Métodos: A cinemática, dinâmica, força de reação ao solo e EMG de superfície de membros inferiores foram medidos por VICON (Nexus 1.8.5), um sistema de análise tridimensional de marcha, e Noraxon, um EMG de superfície sem fio enquanto 13 indivíduos saudáveis caminhavam. O coeficiente de correlação intragrupo (CCI) e erro padrão de medida (EPM) foram utilizados para comparar a confiabilidade relativa e absoluta dos dois resultados de testes. Resultados: A retestagem ICC foi de 78~0.96, o erro padrão SEM% de parâmetros cinemáticos foi de 4.18~15.6, e o SEM% de parâmetros dinâmicos foi de 3.31~21.82. O SEM% de força de reação ao solo foi de 1.70~16.67, e o SEM% do sinal EMG de superfície foi de 8.00~11.11. Conclusões: A análise 3D de marcha pode melhorar o efeito de exercícios de reabilitação e testes de forca tensil, além de ter boa confiabilidade de retestagem. Nível de evidência II; estudos terapêuticos - investigação de resultados de tratamento.

RESUMEN Introducción: La evaluación y corrección oportunas de la marcha hemipléjica posderrame para la recuperación de la habilidad de caminar ha se convertido en un problema apremiante para pacientes con hemiplejia. Objetivo: Un método de análisis tridimensional de la marcha se propuso para mejorar el efecto de ejercicios de rehabilitación y de pruebas de fuerza tensil. Métodos: La cinemática, dinámica, fuerza de reacción del suelo y EMG de superficie de miembros inferiores se midieron por VICON (Nexus 1.8.5), un sistema de análisis tridimensional de marcha, y Noraxon, un EMG de superficie inalámbrico mientras 13 individuos saludables marchaban. El coeficiente de correlación intragrupo (CCI) y error estándar de medida (EEM) fueron utilizados para comparar la confiabilidad relativa y absoluta de dos resultados de pruebas. Resultados: La reprueba CCI fue de 78~0.96, el error estándar EEM% de parámetros cinemáticos fue de 4.18~15.6, y el EEM% de parámetros dinámicos fue de 3.31~21.82. El EEM% de fuerza de reacción del suelo fue de 1.70~16.67, y el EEM% de la señal EMG de superficie fue de 8.00~11.11. Conclusiones: El análisis 3D de marcha puede mejorar el efecto de ejercicios de rehabilitación y pruebas de fuerza tensil, además de tener buena confiabilidad de reprueba. Nivel de evidencia II; Estudios terapéuticos - investigación de resultados de tratamiento.

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SUMMARY: Unilateral condylar hyperplasia (UCH) is an alteration of the mandibular condyle growth. The aim of this study was to evaluate condyle volume, surface area, and Morphological Index (MI) differences between the affected condyle and an unaffected one in patients with UCH, evaluated through 3D reconstructions cone beam computed tomography (CBCT) images by two open-source softwares. A retrospective cross-sectional study of 16 patients with a certain UCH, 9 females and 7 males with mean age 25.13 ± 6.8 years was made. The image obtained from the CBCT of each condyle were reconstructed using the open-source software 3D SLICER 4.6 ®. The volumetric and area measurements of the 3D reconstruction of the mandibular condyle were made using the open-source soft- ware NETFABB basic 5.0 ®. The mean condylar volume of the hyperplastic condyles was 2.07 ± 1.51 cm3 and the non-hyperplastic condyles was 1.16 ± 0.82 cm3 (p<0.05). The mean area surface of the hyperplastic condyle was 11.77 ± 3.71 cm2 and the non-hyperplasic condyle mean was 8.05 ± 2.17 cm2 (p < 0.05). The mean area surface difference was 3.72 ± 3.57 cm2 (28.0 %). The MI of the hyperplastic condyle was 1.8 ± 0.3 mm and the non-affected condyle was 1.3 ± 0.6 mm (p < 0.05). The use of open-source software for 3D reconstruction with manual segmentation for evaluation of the volume and the condylar surface is a valid tool available to the clinic in the diagnosis and monitoring of patients with condylar hyperplasia.

RESUMEN: La hiperplasia condilar unilateral (HU) es una alteración del crecimiento del cóndilo mandibular. El objetivo de este estudio fue evaluar en pacientes el volumen del cóndilo, el área de superficie y las diferencias del índice morfológico (IM) entre el cóndilo afectado y el no afectado en pacientes, mediante tomografía computarizada de haz cónico (TCHC), por medio de dos softwares. Se realizó un estudio transversal retrospectivo de 16 pacientes con determinada HU, 9 mujeres y 7 hombres con edad media 25,13 ± 6,8 años. La imagen obtenida del TCHC de cada cóndilo se reconstruyó utilizando el software de código abierto 3D SLICER 4.6 ®. Las medidas volumétricas y de área de la reconstrucción 3D del cóndilo mandibular se realizaron utilizando el software de código abierto NETFABB basic 5.0 ®. El volumen condilar medio de los cóndilos hiperplásicos fue de 2,07 ± 1,51 cm3 y el de los cóndilos no hiperplásicos fue de 1,16 ± 0,82 cm3 (p <0,05). La superficie media del cóndilo hiperplásico fue de 11,77 ± 3,71 cm2 y la media del cóndilo no hiperplásico fue 8,05 ± 2,17 cm2 (p <0,05). La diferencia de superficie de área media fue 3,72 ± 3,57 cm2 (28,0 %). El IM del cóndilo hiperplásico fue de 1,8 ± 0,3 mm y el cóndilo no afectado fue de 1,3 ± 0,6 mm (p <0,05). Para el clínico, el uso de software de código abierto en la reconstrucción 3D con segmentación manual, para la evaluación del volumen y la superficie condilar, es una herramienta efectiva en el diagnóstico y tratamiento de pacientes con hiperplasia condilar.

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Resumo Fundamento A fístula da artéria coronária (FAC) é uma conexão direta entre uma ou mais artérias coronárias e câmaras cardíacas ou um grande vaso; pode estar associada à cardiopatia congênita. Objetivo Estabelecer os padrões de trajetos de FAC a partir de dados ecocardiográficos e correlacioná-los com aspectos clínicos e cardiopatias congênitas. Métodos Um total de 7.183 prontuários médicos de crianças menores de 5 anos de idade com cardiopatia submetidas a ecodopplercardiograma colorido foram analisados utilizando o teste de correlação de Spearman para associar sinais, sintomas e cardiopatia à FAC, com nível de significância de 5%. Resultados Vinte e seis crianças (0,0036%) apresentaram FAC, nos seguintes trajetos: da artéria coronária direita para o ventrículo direito (26,92%), da artéria coronária esquerda para o ventrículo direito (23,08%), do ramo interventricular anterior para o ventrículo direito (23,08%), da artéria coronária direita para o átrio direito (11,54%), da artéria coronária esquerda para o tronco pulmonar (7,69%) e do ramo interventricular anterior para o tronco pulmonar (7,69%). Em 57,69% dos pacientes, houve uma correlação positiva entre sintomas e a FAC (p = 0,445), relacionada à dispneia ou cianose (53,84%). Em 96,15%, a cardiopatia congênita estava associada à FAC; principalmente, a comunicação interventricular e a comunicação interatrial, em 34,62% dos casos, correlacionaram-se positivamente com a FAC (p = 0,295). O trajeto da FAC foi representado em três dimensões pelo software de modelagem, texturização e animação Cinema 4D R19. Conclusão A FAC é uma entidade anatômica incomum que apresenta quadro clínico compatível com dispneia e cianose e está associada a cardiopatias congênitas, principalmente com a CIV ou a CIA. De acordo com as análises ecocardiográficas, as fístulas na ACD, na ACE ou no RIVA representam aproximadamente um terço dos pacientes, com trajeto prioritário para as câmaras cardíacas direitas.

Abstract Background Coronary artery fistula (CAF) is a direct connection of one or more coronary arteries to cardiac chambers or a large vessel; it may be associated with congenital heart disease. Objective To establish CAF pathway patterns from echocardiographic data and to correlate them with clinical aspects and congenital heart disease. Methods A total of 7.183 medical records of children under the age of five years with cardiac disease submitted to color Doppler echocardiography and Spearman's Correlation test were used to associate signs and symptoms and cardiopathy to CAF with a significance level of 5%. Results Twenty six children (0.0036%) presented CAF: from the right coronary artery (RCA) to the right ventricle (RV) 26.92%, from the left coronary artery (LCA) to the RV 23.08%, from the anterior interventricular branch (AIVB) to RV 23.08%, RCA to right atrium (RA) 11.54%, LCA for pulmonary trunk (PT) 7.69% or AIVB for PT 7.69%. In 57.69% of the patients, there was a positively correlated symptomatology to CAF with p=0.445 related to dyspnea or cyanosis (53.84%); in 96.15%, congenital heart disease associated with CAF, mainly interventricular communication (IVC) or interatrial communication (IAC) in 34.62% positively correlated to CAF with p=0.295. CAF pathway was represented in three dimensions by software modeling, texturing and animation Cinema 4D R19. Conclusion CAF is an uncommon anatomical entity that presents a clinical picture compatible with dyspnea and cyanosis, and this is associated with congenital heart disease, mainly with IVC or IAC. According to echocardiographic analyzes, fistulas in RCA, LCA, or AIVB represent about one-third of the patients, with a priority pathway for right heart chambers.

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Cone-beam computed tomography (CBCT) has been applied in dentistry and medicine for nearly two decades. Its application in the foot and ankle specialty has grown exponentially in recent years. Weight-bearing CBCT allows clinicians to obtain weight-bearing images that can be viewed in all three planes and to construct three-dimensional models, similar to those constructed from traditional CT scans, as well as exposing patients to less radiation than do traditional CT scans. This technology has revolutionized diagnoses, improving the understanding of various lesions and surgical planning in the foot and ankle specialty. Ongoing studies of the use of weight-bearing CBCT in foot and ankle surgery are focused on fully automated and semi-automated three-dimensional measurements, as well as bone segmentation, mapping of the distances/orientation of the joints, and the production of customized implants. The aims of this review article are to show the evolution of this emerging tool in the foot and ankle specialty, to update those in related specialties on its use in current clinical practice, and to indicate where the research community is heading.

A tomografia computadorizada (TC) de feixe cônico é aplicada na área da odontologia e medicina há cerca de duas décadas, e seu uso na especialidade do tornozelo e pé cresceu de forma exponencial nos últimos anos. A literatura demonstra como a TC de feixe cônico permite obter imagens com apoio do peso corporal total - weight-bearing cone-beam computed tomography - com cortes nos três planos e modelos tridimensionais semelhantes às TCs, associada a menor exposição à radiação, técnica que revolucionou o diagnóstico, o entendimento de diferentes lesões e o planejamento cirúrgico nessa área do conhecimento. As mensurações tridimensionais automáticas e semiautomáticas, a segmentação óssea, o mapeamento das distâncias e orientações articulares e a possibilidade de produção de implantes customizados são o interesse dos estudos em andamento na cirurgia do tornozelo e pé relacionados a essa ferramenta emergente. O objetivo deste artigo é mostrar a evolução do método, atualizar as especialidades de interface sobre uso na prática clínica atual e indicar para onde a comunidade científica está caminhando.

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Abstract Cone-beam computed tomography (CBCT) has been applied in dentistry and medicine for nearly two decades. Its application in the foot and ankle specialty has grown exponentially in recent years. Weight-bearing CBCT allows clinicians to obtain weight-bearing images that can be viewed in all three planes and to construct three-dimensional models, similar to those constructed from traditional CT scans, as well as exposing patients to less radiation than do traditional CT scans. This technology has revolutionized diagnoses, improving the understanding of various lesions and surgical planning in the foot and ankle specialty. Ongoing studies of the use of weight-bearing CBCT in foot and ankle surgery are focused on fully automated and semi-automated three-dimensional measurements, as well as bone segmentation, mapping of the distances/orientation of the joints, and the production of customized implants. The aims of this review article are to show the evolution of this emerging tool in the foot and ankle specialty, to update those in related specialties on its use in current clinical practice, and to indicate where the research community is heading.

Resumo A tomografia computadorizada (TC) de feixe cônico é aplicada na área da odontologia e medicina há cerca de duas décadas, e seu uso na especialidade do tornozelo e pé cresceu de forma exponencial nos últimos anos. A literatura demonstra como a TC de feixe cônico permite obter imagens com apoio do peso corporal total - weight-bearing cone-beam computed tomography - com cortes nos três planos e modelos tridimensionais semelhantes às TCs, associada a menor exposição à radiação, técnica que revolucionou o diagnóstico, o entendimento de diferentes lesões e o planejamento cirúrgico nessa área do conhecimento. As mensurações tridimensionais automáticas e semiautomáticas, a segmentação óssea, o mapeamento das distâncias e orientações articulares e a possibilidade de produção de implantes customizados são o interesse dos estudos em andamento na cirurgia do tornozelo e pé relacionados a essa ferramenta emergente. O objetivo deste artigo é mostrar a evolução do método, atualizar as especialidades de interface sobre uso na prática clínica atual e indicar para onde a comunidade científica está caminhando.