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1.
Rev. esp. anestesiol. reanim ; 67(8): 417-424, oct. 2020. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-192477

RESUMO

ANTECEDENTES Y OBJETIVO: Durante la pandemia de COVID-19 se produce una reducción del material para la protección de los profesionales. La impresión 3D ofrece la posibilidad de compensar la escasez de algunos de los suministros. El objetivo es describir el papel de la impresión 3D en un servicio de salud durante la pandemia de COVID-19, con énfasis en proceso para desarrollar un producto final listo para ser implementado en el entorno clínico. MATERIALES Y MÉTODOS: Se formó un grupo de trabajo entre la administración sanitaria, clínicos y otras instituciones público-privadas de Cantabria coordinado en el Hospital virtual Valdecilla. El proceso incluyó la recepción de las propuestas de impresión, el conocimiento de los recursos de impresión en la región, la selección de los dispositivos, la creación de un equipo para cada proyecto, diseño de prototipos, evaluación y rediseño, fabricación montaje y distribución. RESULTADOS: Se producen 1) dispositivos que ayudan a prevenir el contagio de los profesionales: pantallas de protección facial (2.400 unidades), accesorios personalizados para fotóforos (20 unidades) y horquillas salvaorejas para mascarillas (1.200 unidades); 2) productos relacionados con la ventilación de pacientes infectados: conectores de sistemas de ventilación no invasiva entre tubuladura y mascarilla; y 3) hisopos oro y nasofaríngeos (7.500 unidades) para la identificación de portadoras del coronavirus con el objetivo de diseñar protocolos de actuación en las área clínicas. CONCLUSIONES: La impresión 3D es un recurso válido para la producción de material de protección de los profesionales cuyo suministro está reducido durante una pandemia


BACKGROUND AND OBJECTIVE: There is a shortage of supplies for the protection of professionals during the COVID-19 pandemic. 3D printing offers the possibility to compensate for the production of some of the equipment needed. The objective is to describe the role of 3D printing in a health service during the COVID-19 pandemic, with an emphasis on the process to develop a final product ready to be implemented in the clinical environment. METHODS: A working group was formed between the healthcare administration, clinicians and other public and private institutions in Cantabria, Spain coordinated by the Valdecilla Virtual Hospital. The process included receiving the printing proposals, learning about the printing resources in the region, selecting the devices, creating a team for each project, prototyping, evaluation and redesign, manufacturing, assembly and distribution. RESULTS: The following supplies are produced: 1) devices that help protect providers: face protection screens (2,400 units), personalized accessories for photophores (20 units) and ear-protection forks for face-masks (1,200 units); 2) products related to the ventilation of infected patients: connectors for non-invasive ventilation systems; and 3) oral and nasopharyngeal swabs (7,500 units) for the identification of coronavirus carriers with the aim of designing action protocols in clinical areas. CONCLUSIONS: 3D printing is a valid resource for the production of protective material for professionals whose supply is reduced during a pandemic


Assuntos
Humanos , Infecções por Coronavirus/prevenção & controle , Dispositivos de Proteção Respiratória/provisão & distribução , Impressão Tridimensional , Máscaras/provisão & distribução , Pandemias/estatística & dados numéricos , Precauções Universais/métodos , Pessoal de Saúde/estatística & dados numéricos , Proteção Pessoal
3.
Shanghai Kou Qiang Yi Xue ; 29(3): 250-256, 2020 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-33043340

RESUMO

PURPOSE: To compare the mechanical properties of 3D-printed titanium meshes and pre-shaped titanium meshes, and to evaluate the effects of 3D-printed titanium meshes on cell proliferation and differentiation. METHODS: 3D- printed titanium meshes were produced and prepared with laser printing machine. The mechanical properties were analyzed by static tension and compression load test. Bone marrow mesenchymal stem cells (BMSCs) were extracted from 4-week-old male SD rats. BMSCs were co-cultured with 3D-printed titanium meshes of different apertures. Cell counting kit-8 (CCK-8) assay was used to detect cell proliferation. Alkaline phosphatase (ALP) activity assay was used to test ALP activity. The expression of related osteogenic genes was tested by real-time PCR. The adhesion and growth of BMSCs were investigated by scanning electron microscopy (SEM) and living / dead cell staining. SPSS 22.0 software package was used for statistical analysis of the results. RESULTS: The results of 3D-printing Ti-meshes tension and compression loading experiment were excellent. The 3D-printing Ti-meshes showed no inhibitory effects on cell proliferation, survival and adhesion, but had a positive effect on osteogenesis of BMSCs. CONCLUSIONS: The mechanical properties of 3D-printed Ti-meshes are excellent. The 3D-printed Ti-meshes have good biocompatibility.


Assuntos
Implantes Dentários , Titânio , Animais , Masculino , Impressão Tridimensional , Ratos , Ratos Sprague-Dawley , Telas Cirúrgicas
4.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 55(10): 716-721, 2020 Oct 09.
Artigo em Chinês | MEDLINE | ID: mdl-33045781

RESUMO

Three-dimensional (3D) printing prostheses or prosthodontic devices have been preliminarily used in the clinics of prosthodontics. These prostheses or devices include diagnostic prostheses, crowns and fixed bridges, removable denture frameworks, implant surgical template, and custom-made implants, etc. There are three major types of technologies for 3D printing according to the forming principles, namely, light curing, sintering or melting, and melting-condensation. The materials used in 3D printing prostheses or devices include polymers, metals, and ceramics, etc. The advantages of 3D printing prostheses include material-saving, customized manufacturing for restorations, and batch production. However, the precision and strength of prostheses or devices, long-term clinical effects, and grade of maturity in customized manufacturing need further investigation and improving. This article focused on the present application, and the future development of 3D printing technologies in prosthodontic treatments. It will provide beneficial references for the future studies, development, and clinical application of 3D printing technologies and restorations in prosthodontic fields.


Assuntos
Implantes Dentários , Prostodontia , Cerâmica , Coroas , Impressão Tridimensional
5.
Medicine (Baltimore) ; 99(40): e22578, 2020 Oct 02.
Artigo em Inglês | MEDLINE | ID: mdl-33019472

RESUMO

RATIONALE: Exact restoration of the rotation center in total hip arthroplasty (THA) is technically challenging in patients with end-stage osteoarthritis due to developmental dysplasia of the hip (DDH), especially in the Crowe type II and III procedures. The technical difficulty is attributable to the complex acetabular changes. In this study, a novel 3-dimensional (3D) printed integral customized acetabular prosthesis for anatomical rotation restoration in THA for DDH Crowe type III was developed using patient-specific Computer-aided design and additive manufacturing (AM) methods. PATIENT CONCERNS: A 69-year-old female patient had developed left hip joint pain and restricted movement for 40 years; the symptoms had increased in the past 5 months. Pain, limited motion of the left hip joint, and lower limb length discrepancy were noted during physical examination. DIAGNOSIS: The patient was diagnosed with left hip end-stage osteoarthritis secondary to DDH (Crowe type III). INTERVENTION: A 3D printed acetabulum model was manufactured and a simulated operation was performed to improve the accuracy of reconstruction of the rotation center and bone defect. A 3D printed titanium alloy integral customized acetabular prosthesis was designed according to the result of simulated operation. The integral customized prothesis was implanted subsequently via the posterolateral approach. Radiography of the pelvis and Harris score assessment were performed during the perioperative period as well as at the 6- and 12-month follow-up. OUTCOMES: The 3D printed integral customized acetabular prosthesis matched precisely with the reamed acetabulum. The rotation center was restored and the bone defect was exactly reconstructed. There were no signs of prosthetic loosening at the 12-month follow-up. The Harris score gradually improved during the follow-up period. LESSONS: Satisfactory results of hip rotation restoration and bone defect reconstruction could be achieved by using 3D printed integral customized acetabular prosthesis, which provides a promising way to reconstruct the acetabulum in patients with DDH anatomically and rapidly for THA.


Assuntos
Artroplastia de Quadril/instrumentação , Luxação Congênita de Quadril/patologia , Prótese de Quadril/efeitos adversos , Osteoartrite do Quadril/cirurgia , Impressão Tridimensional/instrumentação , Assistência ao Convalescente , Idoso , Feminino , Luxação Congênita de Quadril/classificação , Luxação Congênita de Quadril/complicações , Prótese de Quadril/tendências , Humanos , Desigualdade de Membros Inferiores/diagnóstico , Desigualdade de Membros Inferiores/etiologia , Osteoartrite do Quadril/etiologia , Período Perioperatório/normas , Radiografia/métodos , Rotação , Resultado do Tratamento
6.
Zhonghua Yi Xue Za Zhi ; 100(33): 2601-2606, 2020 Sep 08.
Artigo em Chinês | MEDLINE | ID: mdl-32892606

RESUMO

Objective: To compare the perioperative blood loss in patients undergoing a total knee arthroplasty (TKA) across three different techniques: computer-assisted navigation surgery (CAS), patient specific instrumentation (PSI) and conventional instrumentation (CI). Methods: Ninety consecutive patients with severe knee osteoarthritis who underwent unilateral primary TKA in Peking University Third Hospital Orthopedics Department from January 2018 to December 2018 were enrolled in this prospective study. The patients were randomly divided into three groups (30 case in each group): CAS-TKA group, PSI-TKA group and CI-TKA group. The study measured intraoperative blood loss, total blood loss, hidden blood loss, decreases of hemoglobin and hematocrit, and the post-TKA blood transfusions in the three groups. One-way ANOVA was used to detect the differences among the cohorts, and LSD was used for the post-hoc test. Results: The overall intraoperative blood loss of all patients was 6 ml (5~8 ml). The mean total blood loss and hidden blood loss in CAS-TKA group, PSI-TKA group and CI-TKA group was (1 147.0±301.8) and (1 140.1±301.9)ml, (1 044.3±454.1) and (1 038.5±454.0)ml, (1 154.0±483.6) and (1 145.3±482.7)ml, respectively; there was no significant differences among the three groups (F=0.639, 0.616, both P>0.05). There were no patients who received allogeneic blood transfusion. There were no significant differences in decrease of hemoglobin and hematocrit among the three groups neither (both P>0.05). Conclusions: Compared with conventional TKA, CAS and PSI does not increase the total blood loss of TKA. However, they both demonstrate a potential benefit in reducing blood loss of TKA.


Assuntos
Artroplastia do Joelho , Osteoartrite do Joelho , Cirurgia Assistida por Computador , Humanos , Articulação do Joelho , Impressão Tridimensional , Estudos Prospectivos , Estudos Retrospectivos
7.
Zhongguo Gu Shang ; 33(8): 741-4, 2020 Aug 25.
Artigo em Chinês | MEDLINE | ID: mdl-32875765

RESUMO

OBJECTIVE: To explore the method and accuracy of measuring the femoral neck anteversion in children with developmental dislocation of the hip by using 3D printing technology, so as to find out the method of measuring the femoral neck anteversion accurately and guide the formulation of the operation plan. METHODS: From June 2016 to September 2018, 17 patients with unilateral developmental dislocation of the hip were enrolled in the study, including 2 males and 15 females, aged 2 to 13 (5.47±0.81) years old, 11 on the left and 6 on the right. The methods of CT, 3D printing and intraoperative anteversion of femoral neck were used to measure the anteversion of femoral neck respectively. The intraoperative measurement was used as the standard reference value forstatistical analysis, and the accuracy of the first two methods was compared. RESULTS: The average value of CT was (36.00±1.66)°, the average value of model method was(43.91±1.62)°, and the average value of intraoperative method was(44.21±1.62)°. There were significant differences in CT measurement, model measurement and intraoperative measurement(P<0.05). There was no significant difference between model method and intraoperative method (P>0.05). CONCLUSION: Compared with the traditional CT method, the 3D printing model method is simpler, more accurate and more repeatable, and can simulate the operation before operation. It is an ideal method to measure the femoral neck anteversion.


Assuntos
Artroplastia de Quadril , Colo do Fêmur , Adolescente , Criança , Pré-Escolar , Feminino , Fêmur , Humanos , Masculino , Impressão Tridimensional , Tomografia Computadorizada por Raios X
8.
Zhongguo Gu Shang ; 33(9): 797-801, 2020 Sep 25.
Artigo em Chinês | MEDLINE | ID: mdl-32959565

RESUMO

OBJECTIVE: To investigate the feasibility of a drill template for the placement of guided template of middle and upper thoracic percutaneous vertebroplasty in thoracic pedicle approach on digital design and 3D printing technology. METHODS: The preoperative CT images of 20 patients with thoracic fracture were collected retrospectively. With the 3D soft tissue printing technology, the data was reconstructed by 3D imaging reconstruction software to produce 1∶1 three dimensional soft tissue model. The pedicle screw channel and the digital template were designed by the 3-matic module of Mimics15.0 software. After guide template was printed by 3D printer and three dimensional template was fixed on the model, 2.0 mm Kirschner was placed and the accuracy of a drill template was observed by CT scans, bone cement was injected through the puncture tube and verified with images. The time of nail guide design, guide template production and cost were recorded. RESULTS: The effectiveness of three dimensional thoracic model and digital guided template of middle and upper thoracic percutaneous vertebroplasty of thoracic fractures in thoracic pedicle approach was confirmed. Kirschner was placed and the accuracy of screw placement was confirmed with CT scanning. Template and the corresponding anatomical landmark fitted well, bone cement had showed good filling. The average printing time of upper thoracic spine model with soft tissue, the mean time of nail guide design, guide template production and cost were (719.00±3.03) min, (12.30±1.01) min, (55.50±10.30) min and RMB 3 150 yuan on average respectively. CONCLUSION: By means of individual design and 3D soft tissue printingtechnology, accurate placement of guided template of middle and upper thoracic percutaneous vertebroplasty could be realized.


Assuntos
Parafusos Pediculares , Cirurgia Assistida por Computador , Vertebroplastia , Humanos , Impressão Tridimensional , Estudos Retrospectivos
10.
Mater Sci Eng C Mater Biol Appl ; 117: 111330, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32919683

RESUMO

Nanomotors, multimetallic systems are biologically inspired self-propelled tiny engines able to perform difficult tasks of transporting cargos from one end to another in presence of hydrogen peroxide fuel. Nanomotors can revolutionize the drug delivery system at the desired target by converting chemical energy into mechanical energy. Nanomotors exhibit unique properties like moving at higher speed, self-propulsion and drilling into the complex cellular environment. The review focuses on fuel dependent and fuel-free nanomotors with their propulsion mechanism. Further, the review highlights the method of fabrication, biohybrid nanomotors, toxicities along with their application in the field of active drug delivery, diabetes, precise surgery, ischemic stroke therapy, diagnosis and treatment of coronavirus, microwave hyperthermia, zika virus detection, anti-bacterial activity, water treatment and sensing and challenges lying at the forefront in the development of these tiny nanomachines. Hydrogen peroxide is toxic to mankind; biohybrid motors give an extra edge of eliminating hydrogen peroxide as fuel for self-propulsion, this can be used for smart drug delivery by reducing toxicities as compared to artificial nanomotors. Cost-effective fabrication of nanomotors will extend their applications in commercial sector overcoming limitations like scale-up and regulatory approval. In near future, nanomotors will diversify in fields of restoring conductivity of electronic medical devices, 3D printing and theranostics.


Assuntos
Assistência à Saúde , Nanotecnologia , Pesquisa Biomédica , Catálise , Infecções por Coronavirus/terapia , Humanos , Pandemias , Pneumonia Viral/terapia , Impressão Tridimensional
11.
BMC Res Notes ; 13(1): 421, 2020 Sep 07.
Artigo em Inglês | MEDLINE | ID: mdl-32894167

RESUMO

OBJECTIVE: The advent of new technologies has made it possible to explore alternative ventilator manufacturing to meet the worldwide shortfall for mechanical ventilators especially in pandemics. We describe a method using rapid prototyping technologies to create an electro-mechanical ventilator in a cost effective, timely manner and provide results of testing using an in vitro-in vivo testing model. RESULTS: Rapid prototyping technologies (3D printing and 2D cutting) were used to create a modular ventilator. The artificial manual breathing unit (AMBU) bag connected to wall oxygen source using a flow meter was used as air reservoir. Controlled variables include respiratory rate, tidal volume and inspiratory: expiratory (I:E) ratio. In vitro testing and In vivo testing in the pig model demonstrated comparable mechanical efficiency of the test ventilator to that of standard ventilator but showed the material limits of 3D printed gears. Improved gear design resulted in better ventilator durability whilst reducing manufacturing time (< 2-h). The entire cost of manufacture of ventilator was estimated at 300 Australian dollars. A cost-effective novel rapid prototyped ventilator for use in patients with respiratory failure was developed in < 2-h and was effective in anesthetized, healthy pig model.


Assuntos
Desenho de Equipamento/métodos , Respiração Artificial/instrumentação , Ventiladores Mecânicos/provisão & distribução , Anestesia Geral/métodos , Animais , Infecções por Coronavirus/terapia , Volume de Reserva Expiratória/fisiologia , Feminino , Humanos , Volume de Reserva Inspiratória/fisiologia , Modelos Biológicos , Pandemias , Pneumonia Viral/terapia , Impressão Tridimensional/instrumentação , Respiração Artificial/economia , Respiração Artificial/métodos , Taxa Respiratória/fisiologia , Suínos , Volume de Ventilação Pulmonar/fisiologia , Ventiladores Mecânicos/economia
12.
Nat Commun ; 11(1): 4536, 2020 09 10.
Artigo em Inglês | MEDLINE | ID: mdl-32913189

RESUMO

Natural musculoskeletal systems have been widely recognized as an advanced robotic model for designing robust yet flexible microbots. However, the development of artificial musculoskeletal systems at micro-nanoscale currently remains a big challenge, since it requires precise assembly of two or more materials of distinct properties into complex 3D micro/nanostructures. In this study, we report femtosecond laser programmed artificial musculoskeletal systems for prototyping 3D microbots, using relatively stiff SU-8 as the skeleton and pH-responsive protein (bovine serum albumin, BSA) as the smart muscle. To realize the programmable integration of the two materials into a 3D configuration, a successive on-chip two-photon polymerization (TPP) strategy that enables structuring two photosensitive materials sequentially within a predesigned configuration was proposed. As a proof-of-concept, we demonstrate a pH-responsive spider microbot and a 3D smart micro-gripper that enables controllable grabbing and releasing. Our strategy provides a universal protocol for directly printing 3D microbots composed of multiple materials.


Assuntos
Biomimética/métodos , Compostos de Epóxi/efeitos da radiação , Fenômenos Fisiológicos Musculoesqueléticos , Polímeros/efeitos da radiação , Robótica/métodos , Soroalbumina Bovina/efeitos da radiação , Biomimética/instrumentação , Compostos de Epóxi/química , Hidrogéis/química , Hidrogéis/efeitos da radiação , Concentração de Íons de Hidrogênio , Lasers , Polimerização/efeitos da radiação , Polímeros/química , Impressão Tridimensional , Robótica/instrumentação , Soroalbumina Bovina/química
13.
Nan Fang Yi Ke Da Xue Xue Bao ; 40(8): 1220-1224, 2020 Aug 30.
Artigo em Chinês | MEDLINE | ID: mdl-32895187

RESUMO

Orthopedic 3D printed surgical navigational template is an instrument that is prepared by 3D reconstruction based on preoperative radiological data of the patient using computer-aided design (CAD) and 3D printing techniques. The 3D printed navigational template allows accurate intra-operative assessment of the relative spatial distance, angular relationship, direction and depth. The application of 3D printed navigational template technique in orthopedics surgeries achieves the conversion of preoperative planning from 2/3D graphics to 3D models, and provides a new method for individualized and precise treatment. Herein we review the evolution, clinical application, and basic classification of 3D printed navigation template technique, analyze its advantages and disadvantages, and discuss the current problems and the future development of this technique.


Assuntos
Procedimentos Ortopédicos , Desenho Assistido por Computador , Humanos , Impressão Tridimensional
14.
Nan Fang Yi Ke Da Xue Xue Bao ; 40(8): 1172-1177, 2020 Aug 30.
Artigo em Chinês | MEDLINE | ID: mdl-32895188

RESUMO

OBJECTIVE: To explore the application of 3D visualization and 3D printing in individualized precision surgical treatment of Bismuth-Corlette type Ⅲ and Ⅳ hilar cholangiocarcinoma. METHODS: We retrospectively analyzed the data of 10 patients with hilar cholangiocarcinoma undergoing surgeries under the guidance of 3D visualization and 3D printing in the Department of Hepatobiliary Surgery, Zhujiang Hospital from May 2016 to March 2019. Thin-section CT data of the patients were collected for 3D reconstruction and 3D printing, and the 3D printed models were used for observing the 3D relationship of tumor with the intrahepatic bile duct, hepatic artery, portal vein and hepatic vein system and for performing preoperative simulated surgery and surgical planning. The 3D printed models were subsequently used for real-time intraoperative navigation to guide surgeries in the operating room. RESULTS: 3D visualization models were successfully reconstructed for all the 10 patients and printed into 3D models. The 3D visualization types in Bismuth-Corlette classification included type Ⅲa (4 cases), type Ⅲb (4 cases), and type Ⅳ (2 cases); 4 patients showed portal vein variation, 3 had hepatic artery variation, and 2 had both portal vein and hepatic artery variations. Two patients were found to have trifurcation type of portal vein variation, one had "I-shaped" variation, and one showed the absence of the right anterior branch of the portal vein; 3 patients had hepatic artery variations with the left hepatic artery originating from the left gastric artery (1 case) and the right hepatic artery originating from the superior mesenteric artery (2 cases). Four patients with type Ⅲb underwent left hepatectomy; 4 with type Ⅲa received right hepatectomy; 1 patient with of type Ⅳ received peripheral hepatic resection and another underwent left hepatectomy. The results of preoperative 3D reconstruction, 3D printed model and preoperative planning were consistent with the intraoperative findings. The operative time was 452±75.12 min with a mean intraoperative blood loss of 356±62.35 mL and a mean hospital stay of 15 ± 4.61 days in these cases. One patient had bile leakage and 3 patients had pleural effusion postoperatively, and they were discharged after drainage and medications. No liver failure or death occurred in these cases perioperatively. CONCLUSIONS: 3D visualization and 3D printing can facilitate accurate preoperative assessment, surgical planning and surgical procedure optimization for Bismuth-Corlette type Ⅲ and Ⅳ hilar cholangiocarcinoma to improve surgical safety and reduce surgical risks especially in cases of intrahepatic vascular variations.


Assuntos
Neoplasias dos Ductos Biliares , Colangiocarcinoma , Tumor de Klatskin , Bismuto , Hepatectomia , Humanos , Imageamento Tridimensional , Neoplasias Hepáticas , Veia Porta , Impressão Tridimensional , Estudos Retrospectivos
15.
Foot Ankle Spec ; 13(5): 372-377, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32924584

RESUMO

BACKGROUND: Patients with talar avascular necrosis (AVN) have limited treatment options to manage their symptoms. Historically, surgical options have been limited and can leave patients with little ankle motion and have high failure rates. The use of custom 3D printed total talar replacements (TTRs) has arisen as a treatment option for these patients, possibly allowing better preservation of hindfoot motion. We hypothesized that patients undergoing TTR will demonstrate a statistically significant improvement in Foot and Ankle Outcome Score (FAOS) at 1 year after surgery. METHODS: We retrospectively reviewed 15 patients who underwent a TTR over a 2-year period. Patient outcomes were reviewed, including age, sex, comorbidities, etiology of talar pathology, number and type of prior surgeries, radiographic alignment, FAOS and Visual Analog Scale (VAS) score, and range of motion. Data analysis was performed with Student t-tests and multivariate regression. RESULTS: FAOSs and VAS scores showed statistically significant improvements postoperatively as compared with preoperative scores. There was a statistically significant decrease in VAS pain scores from 7.0 preoperatively to 3.6 (P < .001). Average follow-up was 12.8 months. With the number of patients available, there was no statistically significant change in radiographic alignment parameters postoperatively as compared with preoperatively (P values ranged from .225 to .617). CONCLUSION: Our hypothesis that these patients show statistically significant improvements in FAOSs at 1 year was confirmed. TTR represents an exciting treatment option for patients with talar AVN, though longer-term follow-up is needed.Level of Evidence: Level IV: Case series.


Assuntos
Articulação do Tornozelo/cirurgia , Artroplastia de Substituição do Tornozelo/métodos , Osteonecrose/cirurgia , Impressão Tridimensional , Tálus/cirurgia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Articulação do Tornozelo/fisiopatologia , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Osteonecrose/fisiopatologia , Amplitude de Movimento Articular , Estudos Retrospectivos , Tálus/fisiopatologia , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
16.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 55(9): 647-653, 2020 Sep 09.
Artigo em Chinês | MEDLINE | ID: mdl-32878400

RESUMO

Objective: To prepare a three-dimensional (3D) printing donor tooth model and to observe its application in the peri-operative period. Methods: In part one, 192 cases (2017.9-2019.8) from Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University ï¼»107 males and 85 females, age (34.2±10.7) yearsï¼½ which need autotransplantation of teeth (ATT) were collected. Whether the donor teeth can be completely extracted was predicted through clinical and imaging examination (first prediction). The second prediction was supplemented by the three-dimensional printing model of the donor teeth. Each of the prediction was compared with the actual results and the coincidence rate was calculated. In part two, 64 cases (2017.9-2019.8) from Department of Oral & Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University ï¼»28 males, 36 females, age (30.2±8.3) yearsï¼½ which need ATT were randomly divided into the model group and the donor group. The time of alveolar fossa preparation, time of donor tooth in vitro, times of trial implantation and time of pulptomy and root canal location were recorded respectively. Results: In part one, the coincidence rate between the second prediction and the actual results ï¼»97.4%(187/192)ï¼½ was significantly higher than that of the first prediction ï¼»93.2%(179/192)ï¼½ (P<0.05). In part two, the preparation time of the alveolar fossa in the maxillary and mandibular were (18.8±4.6) and (22.7±3.4) min, the time of the teeth in vitro were (3.0±0.6) and (2.1±0.6) min, the times of trial implantation were (1.3±0.8) and (1.0±0.9), and the time of pulpotomy and root canal location were (4.3±0.6) and (4.0±0.5) min. All values in the model groups were better than those in the donor group (P<0.05). Conclusions: The 3D printing model is accurate. It can be used in autogenous tooth transplantation to shorten the preparation time of alveolar fossa and time of donor tooth in vitro, and reduce the times of trial implantation of donor teeth, and to help to improve the prediction accuracy of complete extraction of donor teeth and the time of pulpotomy and root canal location.


Assuntos
Cirurgia Assistida por Computador , Dente , Modelos Dentários , Feminino , Masculino , Impressão Tridimensional , Transplante Autólogo
17.
Rev Esp Anestesiol Reanim ; 67(8): 417-424, 2020 10.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-32891414

RESUMO

BACKGROUND AND OBJECTIVE: There is a shortage of supplies for the protection of professionals during the COVID-19 pandemic. 3D printing offers the possibility to compensate for the production of some of the equipment needed. The objective is to describe the role of 3D printing in a health service during the COVID-19 pandemic, with an emphasis on the process to develop a final product ready to be implemented in the clinical environment. METHODS: A working group was formed between the healthcare administration, clinicians and other public and private institutions in Cantabria, Spain coordinated by the Valdecilla Virtual Hospital. The process included receiving the printing proposals, learning about the printing resources in the region, selecting the devices, creating a team for each project, prototyping, evaluation and redesign, manufacturing, assembly and distribution. RESULTS: The following supplies are produced: 1) devices that help protect providers: face protection screens (2,400 units), personalized accessories for photophores (20 units) and ear-protection forks for face-masks (1,200 units); 2) products related to the ventilation of infected patients: connectors for non-invasive ventilation systems; and 3) oral and nasopharyngeal swabs (7,500 units) for the identification of coronavirus carriers with the aim of designing action protocols in clinical areas. CONCLUSIONS: 3D printing is a valid resource for the production of protective material for professionals whose supply is reduced during a pandemic.


Assuntos
Betacoronavirus , Infecções por Coronavirus/prevenção & controle , Transmissão de Doença Infecciosa do Paciente para o Profissional/prevenção & controle , Máscaras , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Impressão Tridimensional , Ventiladores Mecânicos , Betacoronavirus/isolamento & purificação , Infecções por Coronavirus/epidemiologia , Cuidados Críticos , Desenho de Equipamento/métodos , Humanos , Máscaras/provisão & distribução , Equipamento de Proteção Individual , Pneumonia Viral/epidemiologia , Espanha , Centros de Atenção Terciária
20.
Medicine (Baltimore) ; 99(31): e21481, 2020 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-32756174

RESUMO

RATIONALE: Severe bone defect could often occur after removing the fractured fixation plates of comminuted fracture in the distal humerus. The reoperation of internal fixation or conventional total elbow arthroplasty could hardly restore the anatomy structure and function of the elbow. However, a novel exploration of 3-dimensional (3D) printed personalized elbow prosthesis was presented in this work. This is a rare and successful treatment for the severe bone defect after removing the fractured fixation plates of comminuted distal humerus fracture. PATIENT CONCERNS: A 60-year-old male patient was admitted to the hospital with the chief complaint of right elbow joint pain and limitation of motion for 10 years. He suffered from an open reduction with internal fixation surgery 10 years ago due to a fall injury-induced right distal humerus fracture. DIAGNOSES: Plain radiographs and computed tomography scan revealed fracture lines, fracture displacement, and fixator breakage in the right distal humerus. Pain, swelling, and limitation of motion could be found in the physical examination. Fixation failure and nonunion after internal fixation of comminuted distal humerus fracture were considered. INTERVENTIONS: The patient was treated with 3D printed personalized TEA and functional rehabilitation exercises. OUTCOMES: No severe complications were observed during the 36 months follow-up. The patient could complete the daily activities without pain. The hospital for special surgery score increased from 15 points before surgery to 90 points 36 months after surgery. LESSONS: The 3D printed personalized prosthesis could successfully reconstruct the anatomical structures and function of the elbow joint with a severe bone defect. The 3D printed personalized total elbow arthroplasty might provide a feasible method for treating the complex elbow joint diseases in the elderly.


Assuntos
Artroplastia de Substituição do Cotovelo/instrumentação , Prótese de Cotovelo , Fraturas Cominutivas/cirurgia , Fraturas do Úmero/cirurgia , Impressão Tridimensional , Reoperação/instrumentação , Artroplastia de Substituição do Cotovelo/métodos , Placas Ósseas/efeitos adversos , Cotovelo/cirurgia , Fixação Interna de Fraturas/efeitos adversos , Humanos , Masculino , Pessoa de Meia-Idade , Redução Aberta/efeitos adversos , Reoperação/métodos , Resultado do Tratamento
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