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1.
Braz. dent. sci ; 25(1): 1-11, 2022. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1354726

ABSTRACT

Objective: To compare the three different methods of complete denture fabrication assessing patient satisfaction and retention after insertion for six months' follow-up period. Material and Methods: The study was conducted in the Prosthodontic Department where a total of forty-eight patients were recruited from the outpatient clinics fulfilling the inclusion criteria. This study was designed as a randomized controlled clinical trial. All patients followed the steps of complete denture construction till jaw relation record. Then, all eligible patients were randomized to intervention and control groups. For intervention groups digital scanning, designing, manufacturing of complete dentures was done; 3D printing for first and milling for second intervention. For the comparator group, complete dentures were manufactured the conventional way. After 2 weeks of delivery of the dentures, patients received a patient satisfaction questionnaire, retention was measured by retention force gauge. Both readings were also recorded after 3 months and at 6 months. The mean and standard deviation values were calculated for each group in each test. The significance level was set at P≤ 0.05. Results: No statistical difference was found in terms of patient satisfaction and retention between the three groups at different time intervals. Conclusion: The manufacturing technique seemed to have no influence on patient satisfaction and retention with milled showing the least results.(AU)


Objetivo: Comparar três métodos diferentes de fabricação de prótese total avaliando a satisfação do paciente e a retenção após a inserção por um período de acompanhamento de seis meses. Material e Métodos: O estudo foi conduzido no departamento de Prótese onde um total de quarenta e oito pacientes foram recrutados das clínicas ambulatoriais atendendo os critérios de inclusão. Este estudo foi designado como um ensaio clínico randomizado controlado. Todos os pacientes seguiram as mesmas etapas de confecção de prótese total até o registro da relação maxilo-mandibular. Então, todos os pacientes qualificados foram divididos de forma aleatória nos grupos de intervenção e grupo controle. Para os grupos de intervenção foram realizados escaneamento digital, projeto e fabricação de próteses totais; Impressão 3D para o primeiro e fresagem para o segundo grupo de intervenção. Para o grupo de comparação, próteses totais foram feitas com o método convencional. Depois de 2 semanas após a entrega das próteses os pacientes receberam um questionário de satisfação e a retenção foi mensurada com um medidor de força de retenção. Ambas as leituras também foram registradas após 3 e 6 meses. Os valores de média e desvio padrão foram calculados para cada grupo em cada teste. O nível de significância foi estabelecido em P ≤ 0,05. Resultados: Nenhuma diferença estatística foi encontrada em termos de satisfação do paciente e retenção entre os três grupos em diferentes intervalos de tempo. Conclusão: A técnica de fabricação pareceu não ter influência na satisfação do paciente e retenção da prótese, com o grupo fresado apresentando o mínimo de resultados.(AU)


Subject(s)
Patient Satisfaction , Dental Prosthesis Retention , Computer-Aided Design , Denture, Complete , Printing, Three-Dimensional
2.
Article in Spanish | LILACS, BINACIS | ID: biblio-1358113

ABSTRACT

El acceso a la tecnología de planificación e impresión 3D está destinado a tener un impacto disruptivo en la práctica quirúrgica de la Ortopedia y Traumatología. Sus ventajas incluyen una mejor comprensión de las lesiones por tratar, mayor precisión técnica, acortamiento de los tiempos quirúrgicos, disminución de la pérdida sanguínea y menor exposición a los rayos. El objetivo de esta publicación es ofrecer una guía práctica paso a paso tomando como ejemplo el tratamiento de una fractura desplazada del tercio medio de la clavícula. Nivel de Evidencia: V


Access to 3D planning and printing technology is destined to have a disruptive impact on the surgical practice of Orthopedics. Its advantages include a better understanding of the injuries, greater technical precision, shortened surgical times, decreased blood loss, and less exposure to X-rays. The aim of this publication is to provide a practical step-by-step guide using the treatment of a displaced middle-third clavicle fracture as an example. Level of Evidence: V


Subject(s)
Orthopedics , Clavicle/injuries , Preoperative Period , Printing, Three-Dimensional
3.
Article in Portuguese | LILACS | ID: biblio-1353108

ABSTRACT

Planejamento pré-operatório de correção de deformidades supramaleolares através de impressão 3DRELATO DE CASOModelos impressos em 3D têm sido explorados profundamente no campo médico, destacando-se como importante ferramenta de auxílio para planejamento cirúrgico. Os autores apresentam relato de caso de um paciente, com artrose pós-traumática do tornozelo direito, submetido a osteotomia supramaleolar, em cunha de fechamento medial. Esta cirurgia foi realizada após planejamento operatório por impressão 3D, o que pode demonstrar reprodutibilidade deste método. (AU)


3D printed models have been explored deeply in the medical field, standing out as an important aid tool for surgical planning. The authors present a case report of a patient with post-traumatic arthrosis of the right ankle, who underwent supramaleolar osteotomy, using a medial closure wedge. This surgery was performed after operative planning by 3D printing, which can demonstrate the reproducibility of this method. (AU)


Subject(s)
Humans , Osteoarthritis , Osteotomy , Surgical Procedures, Operative , Congenital Abnormalities , Planning , Printing, Three-Dimensional
4.
Rev. bras. ortop ; 56(6): 809-812, Nov.-Dec. 2021. graf
Article in English | LILACS | ID: biblio-1357138

ABSTRACT

Abstract The present study aims to demonstrate how biomodels can be used as teaching tools for surgical techniques and training in a medical residency service. A case series was carried out in our orthopedics and traumatology outpatient facility using three-dimensional (3D) printing for surgical planning to contribute to the surgical teaching and training of resident physicians. Two cases were selected as examples in the present article. Biomodels enable a better understanding of the surgery by the surgical team and residents, reducing the surgical time and the risks for the patients. These models can be a good teaching method to plan reconstructions of total hip arthroplasties, evaluate and predict surgical difficulties, and optimize procedures.


Resumo O objetivo deste trabalho é demonstrar como os biomodelos podem servir como ferramenta de ensino para o esclarecimento de técnicas cirúrgicas e o treinamento em um serviço de residência médica. Foram realizadas séries de casos em nosso ambulatório de ortopedia e traumatologia, nos quais o uso da prototipagem para o planejamento cirúrgico contribuiu para o ensino cirúrgico e treinamento de médicos residentes. Dois casos foram selecionados como exemplo neste artigo. O uso de biomodelos permite um melhor entendimento da cirurgia pela equipe cirúrgica e pelos residentes, e diminui o tempo e os riscos cirúrgicos aos pacientes. O uso de biomodelos no planejamento de reconstruções da artroplastia total do quadril pode servir como um bom método de ensino, para a avaliação e previsão das dificuldades no momento da cirurgia, e para otimizar os procedimentos.


Subject(s)
Arthroplasty, Replacement, Hip , Printing, Three-Dimensional , Internship and Residency , Medical Staff, Hospital , Models, Anatomic
5.
Coluna/Columna ; 20(3): 174-180, July-Sept. 2021. tab, graf
Article in English | LILACS | ID: biblio-1339749

ABSTRACT

ABSTRACT Objective To evaluate the immediate correction capacity of the Wood-Chêneau-Rigo brace (WCR), produced using digital technological resources and robotic engineering, in primary and secondary curves of adolescent idiopathic scoliosis (AIS). Methods A retrospective study was conducted of 138 patients with a diagnosis of AIS and who received a WCR brace from a laboratory that makes orthoses and orthopedic prostheses between 2019 and 2021. These individuals were submitted to an independent analysis of the radiographic parameters by a single researcher, the main outcome of which was the standardized measurement of the main and secondary curves using the Cobb method. The radiographs analyzed were performed in orthostasis before and immediately after the adaptation of the brace on the patient. The correction capacity was calculated as the ratio of the difference between the pre- and post-brace curves to the pre-brace curve. Results The mean correction with the WCR was 48.4% for the main curve and 41.0% for the secondary curve. The level of correction of the main curve was significantly higher in patients with a main curve with the apex of convexity in the thoracolumbar region (p = 0.004), especially in the left thoracolumbar region (p = 0.010); curves of magnitude between 10º and 24.9º (p <0.001); and curves classified as simple (p <0.001). Conclusion The use of the WCR, which is produced using modern technological resources, was effective in the immediate correction of AIS. Long-term studies on this new modality of conservative scoliosis treatment are necessary. Level of evidence III; Retrospective study.


RESUMO Objetivo Avaliar a capacidade de correção imediata do colete Wood-Chêneau-Rigo (WCR), produzido com recursos tecnológicos digitais e de engenharia robótica, em curvas primárias e secundárias de escoliose idiopática do adolescente (EIA). Métodos Realizou-se um estudo retrospectivo com 138 pacientes com diagnóstico de EIA que adquiriram o colete WCR entre 2019 e 2021 em um laboratório de produção de órteses e próteses ortopédicas. Esses indivíduos foram submetidos à análise independente dos parâmetros radiográficos por um único pesquisador, tendo como desfecho principal a medida padronizada das curvas principal e secundária pelo método de Cobb. As radiografias analisadas foram realizadas em ortostase antes e imediatamente depois da adaptação do colete no paciente. A capacidade de correção foi calculada pela razão entre a diferença das curvas pré e pós-colete e a curva pré-colete. Resultados A média de correção da curva primária com o WCR foi de 48,4% e a da curva secundária foi de 41,0%. O nível de correção da curva primária foi significativamente maior nos pacientes com curva principal com ápice da convexidade na região toracolombar (p = 0,004), principalmente toracolombar à esquerda (p = 0,010); curvas com magnitude entre 10º e 24,9º (p < 0,001) e curvas do tipo simples (p < 0,001). Conclusões O colete WCR, produzido com modernos recursos tecnológicos, foi eficaz na correção imediata da EIA. São necessários estudos a longo prazo sobre essa nova modalidade de tratamento conservador da escoliose. Nível de Evidência III; Estudo retrospectivo.


RESUMEN Objetivo Evaluar la capacidad de corrección inmediata del corsé de Wood-Chêneau-Rigo (WCR), producido con recursos tecnológicos digitales e ingeniería robótica, en curvas primarias y secundarias de la escoliosis idiopática del adolescente (EIA). Métodos Se realizó un estudio retrospectivo de 138 pacientes con diagnóstico de EIA que adquirieron el corsé WCR entre 2019 y 2021 en un laboratorio de producción de ortesis y prótesis ortopédicas. Estos individuos fueron sometidos a un análisis independiente de los parámetros radiográficos por un solo investigador, siendo el resultado principal la medición estandarizada de las curvas principal y secundaria por el método de Cobb. Las radiografías analizadas se tomaron en bipedestación antes e inmediatamente después de la adaptación del corsé al paciente. La capacidad de corrección se calculó por la razón entre la diferencia entre las curvas de antes y de después del uso del corsé y la curva de antes del corsé. Resultados La corrección promedio de la curva primaria con el WCR fue del 48,4% y de la curva secundaria fue del 41,0%. El nivel de corrección de la curva primaria fue significativamente más grande en pacientes con una curva principal con vértice de la convexidad en la región toracolumbar (p = 0,004), principalmente toracolumbar a la izquierda (p = 0,010); curvas con magnitud entre 10º y 24,9º (p < 0,001) y curvas simples (p < 0,001). Conclusiones El uso corsé WCR, producido con modernos recursos tecnológicos, fue efectivo en la corrección inmediata de la EIA. Se necesitan estudios a largo plazo sobre esta nueva modalidad de tratamiento conservador de la escoliosis. Nivel de evidencia III; Estudio retrospectivo.


Subject(s)
Humans , Male , Female , Child , Adolescent , Orthotic Devices , Scoliosis/rehabilitation , Printing, Three-Dimensional , Retrospective Studies , Analysis of Variance , Conservative Treatment
6.
Arq. bras. med. vet. zootec. (Online) ; 73(4): 861-867, Jul.-Aug. 2021. ilus
Article in English | LILACS, VETINDEX | ID: biblio-1285260

ABSTRACT

The aim of this study was to evaluate the anatomical structures of the skulls of peccaries to establish the basis for their clinical study and future preclinical research. Ten skulls of adult peccaries were subjected to tomographic examination. The data obtained were processed via three-dimensional image reconstruction software (3D images). The reconstructions obtained from the neurocranium of the studied specimens allowed the identification and description of the following structures: nasal bone, frontal bone, parietal bones, incisor bone, maxillary bone, zygomatic bone, temporal bone, palatal bone, occipital bone, vomer bone, pterygoid bone, sphenoid bone, paranasal sinuses and orbit. Computed tomography proved to be an important diagnostic tool in the investigation of the skull of this species, allowing the acquisition of anatomical values not yet documented for the species in the literature.(AU)


O objetivo deste estudo foi avaliar as estruturas anatômicas dos crânios de catetos, a fim de se estabelecerem as bases para seu estudo clínico e futuras pesquisas pré-clínicas. Dez crânios de catetos adultos foram submetidos a exame tomográfico. Os dados obtidos foram introduzidos em um software de reconstrução de imagens tridimensionais (imagens em 3D). As reconstruções obtidas do neurocrânio dos espécimes estudados permitiram a identificação e a descrição das seguintes estruturas: osso nasal, osso frontal, ossos parietais, osso incisivo, osso maxilar, osso zigomático, osso temporal, osso palatino, osso occipital, osso vômer, osso pterigoide, osso esfenoide, seios paranasais e órbita. A tomografia computadorizada mostrou-se como uma ferramenta diagnóstica importante na investigação do crânio dessa espécie, permitindo a aquisição de valores anatômicos ainda não documentados para a espécie na literatura.(AU)


Subject(s)
Animals , Artiodactyla/anatomy & histology , Skull/anatomy & histology , Skull/diagnostic imaging , Tomography, X-Ray Computed/veterinary , Imaging, Three-Dimensional/veterinary , Printing, Three-Dimensional
8.
Rev. Assoc. Méd. Rio Gd. do Sul ; 65(2): 01022105, Abr. - Jun. 2021.
Article in Portuguese | LILACS | ID: biblio-1367462

ABSTRACT

RESUMO Introdução: As impressões tridimensionais, criadas a partir dos anos 1980, são realidade em diversas áreas de atuação da sociedade moderna, sendo seu papel nas especialidades cirúrgicas cada vez mais relevante. Dentre os potenciais benefícios desta tecnologia, cita-se a possibilidade de avaliação pré-operatória, estimando de maneira precisa parâmetros de mensuração, aperfeiçoando a acurácia terapêutica, teoricamente reduzindo o tempo de permanência no bloco cirúrgico e, consequentemente, compensando o investimento do modelo tridimensional pela economia de custo. Objetivo: Analisar o efeito da utilização da impressão tridimensional na avaliação pré-operatória em parâmetros como tempo cirúrgico comparado ao controle (método tradicional sem utilizar impressão 3D) em pacientes submetidos a numerosos tipos de cirurgia. Tipo de estudo: Revisão sistemática de ECR com metanálise. Estratégia de busca: As fontes de estudos utilizadas foram as bases de dados: MEDLINE (via PubMed), EMBASE, Web of Science, Web of Knowledge e SCOPUS. Não foram realizadas limitações quanto ao idioma. O estudo foi registrado no PROSPERO: CRD42018110303. Critérios para seleção dos estudos: Somente ensaios clínicos randomizados nos quais a impressão 3D foi utilizada para avaliação pré- -operatória. A população caracterizou-se por pacientes submetidos a cirurgias utilizando das impressões tridimensionais na avaliação pré-operatória. Os desfechos primários avaliados foram tempo cirúrgico, sangramento intraoperatório e número de fluoroscopias. Resultados: redução do tempo cirúrgico de 11.85 minutos (12.22, 11.49); menor sangramento intraoperatório em mililitros de 28.23 (30.15, 26.31); menos fluoroscopias, com redução de 1.84 (1.93, 1.76). Conclusões: A impressão tridimensional se traduz em uma tecnologia custo-efetiva quando considerados parâmetros de redução de gastos no ato operatório. PALAVRAS-CHAVE: Impressão 3D, procedimentos cirúrgicos, custo-efetividade, metanálise


ABSTRACT Introduction: Three-dimensional impressions, created from the 1980s onwards, are a reality in several areas of activity in modern society, and their role in surgical specialties is increasingly relevant. Among the potential benefits of this technology, there is the possibility of preoperative evaluation, accurately estimating measurement parameters, improving therapeutic accuracy, theoretically reducing the length of stay in the operating room and, consequently, compensating the investment of the three-dimensional model by cost savings. Objective: To analyze the effect of using three-dimensional printing in the preoperative evaluation on parameters such as surgical time compared to control (traditional method without using 3D printing) in patients undergoing numerous types of surgery. Type of study: Systematic review of RCT with meta-analysis. Search strategy: The sources of studies used were the following databases: MEDLINE (via PubMed), EMBASE, Web of Science, Web of Knowledge and SCOPUS. No language limitations were made. The study was registered in PROSPERO: CRD42018110303. Criteria for study selection: Only randomized clinical trials in which 3D printing was used for preoperative evaluation. The population was characterized by patients undergoing surgery using three-dimensional impressions in the preoperative evaluation. The primary outcomes assessed were surgical time, intraoperative bleeding and number of fluoroscopies. Results: Surgical time reduction of 11.85 minutes (12.22, 11.49); less intraoperative bleeding in milliliters of 28.23 (30.15, 26.31); fewer fluoroscopies, with a reduction of 1.84 (1.93, 1.76). Conclusions: Three-dimensional printing translates into a cost-effective technology when considering parameters of cost reduction in the surgical act. KEYWORDS: 3D printing, surgical procedures, cost-effectiveness, meta-analysis


Subject(s)
Humans , Surgical Procedures, Operative , Cost-Benefit Analysis , Meta-Analysis , Printing, Three-Dimensional
9.
Odontol. Clín.-Cient ; 20(3): 41-46, jul.-set. 2021. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1369852

ABSTRACT

Devido ao avanço tecnológico e a busca da excelência do tratamento, a prototipagem rápida (PR) tornou-se realidade na odontologia com uso de exames de imagem, sendo a tomografia computadorizada a mais utilizada. Assim, é possível analisar com precisão a anatomia do paciente e simular o procedimento nos biomodelos, resultando na otimização do tratamento. O objetivo do trabalho é descrever a aplicação dos processos de impressão tridimensional na odontologia. Foi realizada uma revisão de literatura integrativa utilizando os descritores: Impressão Tridimensional, CAD-CAM e Odontologia Digital nas bases de dados PubMed e Scielo e nos bancos de dados Europe PMC e BVS. Os protótipos vem sendo um marco na odontologia moderna, sendo eles réplicas de estruturas anatômicas que são criados a partir da conversão de imagens 3D obtidas por meio de exames de imagem, como a tomografia computadorizada (TC) e a ressonância magnética (RM), em imagens reais. As imagens adquiridas são reformatadas por meio de softwares específicos que utilizam os sistemas CAD e CAM. O biomodelos permite a simulação do respectivo procedimento, evitando imprevistos no transoperatório, aumentam a segurança e estreita a relação entre o profissional e o paciente, resultando na maior satisfação no resultado final... (AU)


Due to technological advancement and the search for excellence in treatment, the rapid prototyping (RP) becomes reality in dentistry with the imaging exams, being the computed tomography being the most used. Thus, it is possible to accurately analyze the patient's anatomy and simulate the procedure on biomodels, resulting in treatment optimization. The objective of the work is to describe the application of three-dimensional printing processes in dentistry. An integrative literature review was realized using the descriptors: Three-dimensional printing, CAD-CAM and Digital Dentistry in the PubMed and Scielo databases and in the Europe PMC and BVS databank. The prototypes have been a landmark in modern dentistry, they are replicas of anatomical structures that are created from the conversion of 3D images obtained through image exams, such as computed tomography (CT) and magnetic resonance (MR), in real images. The acquired images are reformatted using specific software using the CAD and CAM systems. The biomodel allows the simulation of the respective procedure, avoiding unforeseen circumstances during the operation, increasing safety and strengthening the relationship between the professional and the patient, resulting in greater satisfaction in the final result.. (AU)


Subject(s)
Humans , Male , Female , Technology, Dental , Computer-Aided Design , Printing, Three-Dimensional
10.
Rev. bras. ortop ; 56(3): 384-389, May-June 2021. graf
Article in English | LILACS | ID: biblio-1288683

ABSTRACT

Abstract Distal radial fractures are very common. Vicious consolidation can occur in up to one third of these fractures, resulting in wrist pain, restricted movement, and, eventually, physical limitation or disability. The treatment of this condition consists in corrective osteotomy, which requires careful preoperative planning due to its three-dimensional complexity, especially in injuries with joint involvement. Recently, prototyping based on three-dimensional (3D) reconstruction of computed tomography (CT) scans has been used for osteotomy planning in a 3D anatomical model. It allows a better understanding of the deformity in a realistic surgical approach, leading to safer, faster, and more predictable procedures. The aim of the present study is to present this technique and show its use in two clinical cases.


Resumo As fraturas da porção distal do rádio estão entre as mais comuns do esqueleto. A consolidação viciosa pode ocorrer em até um terço dessas fraturas e acarretar restrição de movimento e dor no punho, com consequente limitação ou incapacidade laboral. O tratamento desta condição implica em osteotomia corretiva das deformidades, o que necessita de um planejamento pré-operatório criterioso em virtude de sua complexidade tridimensional, notadamente naquelas em que há acometimento articular. Assim, recentemente, tem sido utilizada a prototipagem a partir da reconstrução 3D da tomografia computadorizada (TC), o que permite o planejamento com realização da osteotomia em modelo anatômico tridimensional, com o melhor entendimento da deformidade, aproximando-se da situação realística da cirurgia, o que torna o procedimento mais seguro, ágil e previsível. O objetivo do presente estudo é apresentar esta técnica e seu emprego em dois casos clínicos.


Subject(s)
Humans , Male , Female , Middle Aged , Osteotomy , Radio , Tomography, X-Ray Computed , Fractures, Bone , Printing, Three-Dimensional , Models, Anatomic
11.
Arch. cardiol. Méx ; 91(1): 1-6, ene.-mar. 2021. graf
Article in Spanish | LILACS | ID: biblio-1152854

ABSTRACT

Resumen Introducción: Los defectos cardíacos congénitos constituyen el 30% de todas las anomalías congénitas. La prevalencia es de 8/1,000 recién nacidos vivos, sin predominio de género. Para una planificación quirúrgica óptima es esencial una evaluación precisa de la anatomía en los defectos cardíacos congénitos. Las modalidades de imagen como el ecocardiograma, la angiografía por cateterismo cardíaco, la tomografía computarizada (TC) o la resonancia magnética (RM) se utilizan de forma regular para el diagnóstico de las cardiopatías congénitas. Estos métodos pueden proporcionar reconstrucciones virtuales en reconstrucción volumétrica o 3D, pero no réplicas táctiles reales de la anatomía cardíaca. Objetivo: Realizar modelos de corazón impresos en 3D con la finalidad de proporcionar réplicas táctiles 3D reales de la anatomía cardíaca para visualizar de forma detallada todas las perspectivas posibles de las estructuras extracardíacas o intracardíacas. Métodos: Los datos de la imagen se obtuvieron en formato DICOM, se editaron en el paquete de software "3D slicer 4.3" y se exportaron para la impresión en formato de archivo (.stl). Resultados y conclusiones: Con la impresión 3D se puede evaluar de forma detallada la anatomía intracardíaca y extracardíaca con modelos cardíacos en tiempo real. Esta técnica es de gran utilidad, sobre todo en los defectos cardíacos congénitos complejos, ya que permite hacer una planificación precisa del procedimiento quirúrgico.


Abstract Introduction: Congenital heart disease makes up for 30% of all congenital anomalies. The prevalence is 8/1,000 live newborns, without predominance of gender. Imaging methods such as echocardiography, angiography, computed tomography or magnetic resonance imaging must be routinely used in congenital heart disease. The mentioned methods can provide virtual reconstructions in volumetric reconstruction or in three dimensional (3D), but only 3D-printed heart models can provide real 3D tactile replicas of cardiac anatomy. Objective: To make 3D printed heart models in order to provide real 3D tactile replicas of the cardiac anatomy that allow a detailed visualization from all possible perspectives, either of extracardiac or intracardiac structures. Methods: This information is useful for surgical decision making, especially in patients with complex cardiac defects. DICOM, edited in a software package "3D slicer 4.3" and exported for printing in file format (.stl). Results and conclusions: With 3D printing, the intracardiac and extracardiac anatomy can be evaluated in detail with real-scale cardiac models of the patient, avoiding unexpected findings. This technique is very useful especially in complex congenital heart defects, since it allows precise planning of the surgical procedure.


Subject(s)
Humans , Male , Female , Infant , Child , Adolescent , Patient Care Planning , Printing, Three-Dimensional , Heart Defects, Congenital/surgery , Models, Anatomic
12.
Article in Chinese | WPRIM | ID: wpr-922051

ABSTRACT

Four-dimensional (4D) printing is an emerging technology that combines science and engineering techniques. The term, "4D printing" was coined in 2013 and since then it has attracted a lot of interests due to its unique ability to have structural or functional transformations over time in response to external stimuli. The most important element of 4D printing is the responsive material. The recent progress research of hydrogels and related new technologies for 4D printing was summarized in the field of implanted medical devices at home and abroad in this paper. Then, it was pointed out the problems of responsive materials for 4D printing. Finally, it was prospected that the development of 4D printing technology in the field of implantable medical devices.


Subject(s)
Hydrogels , Printing, Three-Dimensional , Prostheses and Implants
13.
Article in Chinese | WPRIM | ID: wpr-922048

ABSTRACT

A 3D printing based wrist orthosis device was developed. After collecting the contour information of the carpal and metacarpophalangeal joints of the patients with a 3D scanner, the wrist orthotics were designed to meet the individual needs of the patients according to the relevant requirements of biomechanics. Choose TPU (thermoplastic polyurethanes) materials for preparation of 3D printing. It can functionally assist the smart brace after stroke patients with hemiplegia early rehabilitation training, the use of orthoses carry MPU6050 inertial sensor, magnetometer, time module device such as a sensor and monitor its movements and record the training time, ensure safe efficient rehabilitation training, help patients return to a normal life as soon as possible.


Subject(s)
Humans , Orthotic Devices , Printing, Three-Dimensional , Stroke , Wrist , Wrist Joint
14.
Journal of Biomedical Engineering ; (6): 1018-1027, 2021.
Article in Chinese | WPRIM | ID: wpr-921841

ABSTRACT

Spinal fusion is a standard operation for treating moderate and severe intervertebral disc diseases. In recent years, the proportion of three-dimensional printing interbody fusion cage in spinal fusion surgery has gradually increased. In this paper, the research progress of molding technology and materials used in three-dimensional printing interbody fusion cage at present is summarized. Then, according to structure layout, three-dimensional printing interbody fusion cages are classified into five types: solid-porous-solid (SPS) type, solid-porous-frame (SPF) type, frame-porous-frame (FPF) type, whole porous cage (WPC) type and others. The optimization process of three-dimensional printing interbody fusion cage and the advantages and disadvantages of each type are analyzed and summarized in depth. The clinical application of various types of 3D printed interbody fusion cage was introduced and summarized later. Lastly, combined with the latest research progress and achievements, the future research direction of three-dimensional printing interbody fusion cage in molding technology, application materials and coating materials is prospected in order to provide some reference for scholars engaged in interbody fusion cage research and application.


Subject(s)
Humans , Intervertebral Disc Degeneration , Intervertebral Disc Displacement , Porosity , Printing, Three-Dimensional , Spinal Fusion
15.
Chinese Journal of Biotechnology ; (12): 4024-4035, 2021.
Article in Chinese | WPRIM | ID: wpr-921483

ABSTRACT

Decellularized extracellular matrix (dECM), which contains many proteins and growth factors, can provide three-dimensional scaffolds for cells and regulate cell regeneration. 3D bioprinting can print the combination of dECM and autologous cells layer by layer to construct the tissue structure of carrier cells. In this paper, the preparation methods of tissue and organ dECM bioink from different sources, including decellularization, crosslinking, and the application of dECM bioink in bioprinting are reviewed, with future applications prospected.


Subject(s)
Bioprinting , Extracellular Matrix , Printing, Three-Dimensional , Tissue Engineering , Tissue Scaffolds
16.
Article in English | WPRIM | ID: wpr-921377

ABSTRACT

OBJECTIVES@#This study was performed to investigate the microstructure and mechanical properties of dental zirconia manufactured by digital light processing (DLP) 3D printing and the clinical application prospects of this material.@*METHODS@#The experiment (DLP) group was zirconia manufactured by DLP 3D printing, and the control (MILL) group was milled zirconia. The density, grain size, and phase composition were measured to study the microstructure. Flexural strength was measured by using three-point bending tests, while Vickers hardness was determined through a Vickers hardness tester. Fracture toughness was tested using the single-edge V-notched beam method.@*RESULTS@#Zirconia density of the DLP group was (6.019 8±0.021 3) g·cm@*CONCLUSIONS@#Zirconia manufactured by DLP 3D printing had microstructure and mechanical properties similar to those of the milled zirconia. Only the flexural strength and the Vickers hardness of the experimental zirconia were slightly lower than those of the milled zirconia. Therefore, DLP-manufactured zirconia has a promising future for clinical use.


Subject(s)
Dental Porcelain , Materials Testing , Printing, Three-Dimensional , Zirconium
17.
Article in English | WPRIM | ID: wpr-878402

ABSTRACT

Digital technologies use high-precision three-dimensional scanning, intelligence-aided design software, and multi-axis numerical control milling or 3D printing, which can produce restorations with reliable precision and suitable function. However, the development of digital technologies in the field of complete denture restoration has been slow due to the complexity of prosthesis. This review article introduces the current research status and clinical applications of digital complete dentures in prosthodontic clinics and dental laboratories to provide beneficial references to prosthodontists and dental technicians.


Subject(s)
Computer-Aided Design , Denture, Complete , Printing, Three-Dimensional
18.
Article in Chinese | WPRIM | ID: wpr-880451

ABSTRACT

OBJECTIVE@#This paper introduces the key content and background of Technical Review Guidance for the Registration of Personalized Additive Manufacturing Medical Devices of Passive Implantable Bone, Joint and Oral Hard Tissues.@*METHODS@#The core contents and importance of the construction of personalized design validation and verification and additive manufacturing system are described respectively.@*RESULTS@#The personalized design needs to be carried out under the control of interactive cooperation between healthcare professional and engineer. And the performance of personalized device must be validated and verified completely. At the same time, in view of the particularity of the quality management system of additive manufacturing, the technical focus is expounded.@*CONCLUSIONS@#New ideas and methods shall be used in evaluate and administrate personalized additive manufacturing medical device.


Subject(s)
Printing, Three-Dimensional , Prostheses and Implants
19.
Article in Chinese | WPRIM | ID: wpr-880422

ABSTRACT

It is well known that chitosan-based composites are widely used in implantable medical devices. The development of chitosan-based composite materials with different types was summarized in this paper, such as inorganic, organic and composite phases. Then, combined with the research focus, the development of 3D printing technology and chitosan-based composites was summarized. It was also pointed out that the existing problems in our research, which need to be solved urgently. At last, the development direction and broad application prospect of chitosan-based composites were prospected. And we look forward to providing reference for relevant research.


Subject(s)
Biocompatible Materials , Chitosan , Printing, Three-Dimensional , Prostheses and Implants
20.
Rev. Fac. Odontol. (B.Aires) ; 36(83): 13-20, 2021. ilus
Article in Spanish | LILACS | ID: biblio-1342365

ABSTRACT

La microcirugía endodóntica (MCE) es una alternativa al tratamiento no quirúrgico de la periodontitis apical persistente. Por su evolución junto a los avances tecnológicos, la incorporación de la tomografía computarizada de haz cónico (CBCT), la tecnología de impresión tridimensional (3D) y las guías quirúrgicas diseñadas con software asistido por computadora, han permitido implementar la planificación digital llevada a cabo en el acto quirúrgico. El objetivo de este informe es describir un caso clínico de MCE guiada, con un protocolo de diseño digital y el uso de una guía quirúrgica impresa en resina biocompatible, diseñada con precisión de acuerdo con las mediciones de CBCT preoperatorias. Se diseñó un kit de trefinas con "sleeves" (Neokings) para realizar la osteotomía y resección de los últimos 3 mm apicales direccionados por la guía quirúrgica. La tabla cortical intacta se recuperó y se utilizó como injerto junto con plasma rico en fibrina. La guía de cirugía apical permite al profesional lograr ubicar con precisión los tejidos objetivos de la cirugía y acortar el tiempo del procedimiento. Un control CBCT inmediato mostró la planificación exacta en 3D del sitio quirúrgico (AU)


Subject(s)
Humans , Female , Adult , Apicoectomy/methods , Periapical Periodontitis , Microsurgery , Osteotomy , Patient Care Planning , Argentina , Plasma , Schools, Dental , Clinical Protocols , Cone-Beam Computed Tomography , Printing, Three-Dimensional
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