Bone Screw
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. Cadaveric study of anatomical measurement of isthmus parameters of lumbar spine to guide cortical bone screw placement
SUMMARY OBJECTIVE: To reduce surgical exposure and improve accuracy, this study evaluated the anatomical distance parameter D (including D1, D2, and D3) of the lumbar isthmus for cortical bone screw insertion. METHODS: A total of 25 structurally complete lumbar dry specimens were used for lumbar anatomy measurements. The six cadaver specimens were divided
Revista da Associação Médica Brasileira. Publicado em: 2022
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2. PROPHYLACTIC OF STRESS FRACTURES OF VERTEBRAE ADJACENT TO TRANSPEDICULAR SCREW FIXATION FOR OSTEOPOROSIS
RESUMO Objetivo: Avaliar a eficácia e o uso da vertebroplastia como medida profilática para prevenir fraturas por estresse das vértebras adjacentes à fixação com parafuso transpedicular com o aumento da osteoporose. Métodos: Foi realizado um estudo cadavérico experimental para avaliar a resistência global de 10 blocos cadavéricos dos segmentos T1
Coluna/Columna. Publicado em: 14/11/2019
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3. Biomechanical Test after Hip Cannulated Screw Removal (in vitro Analysis)
Resumo Objetivo Avaliar, pormeio de ensaio biomecânico, a resistência e a energia necessária para ocorrência de fratura do fêmur proximal em osso sintético após retirada de parafusos canulados em forma de triângulo invertido e comparar os resultados obtidos com técnica de reforço utilizando polimetilmetacrilato (PMMA). Métodos Foramutilizados
Rev. bras. ortop.. Publicado em: 07/10/2019
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4. TOMOGRAPHIC STUDY OF THE S2-ALAR-ILIAC SCREW TECHNIQUE IN BRAZILIAN MEN
RESUMO Objetivo O uso de parafusos pediculares foi um marco para a cirurgia moderna de coluna vertebral. Esse tipo de fixação, devido a sua biomecânica superior, deu maior poder de fixação, maior capacidade de resistir às forças de arrancamento e, portanto, maior estabilidade e menores taxas de pseudoartrose. A fixação da junção lombossacra, mesm
Coluna/Columna. Publicado em: 02/09/2019
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5. Clinical evaluation of a bone cement-injectable cannulated pedicle screw augmented with polymethylmethacrylate: 128 osteoporotic patients with 42 months of follow-up
OBJECTIVES: To evaluate the safety and efficacy of a novel bone cement-injectable cannulated pedicle screw augmented with polymethylmethacrylate in osteoporotic spinal surgery. METHODS: This study included 128 patients with osteoporosis (BMD T-score −3.2±1.9; range, −5.4 to -2.5) who underwent spinal decompression and instrumentation with a polymethyl
Clinics. Publicado em: 06/06/2019
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6. Biomechanical Evaluation of Different Tibial Fixation Methods in the Reconstruction of the Anterolateral Ligament in Swine Bones
Resumo Objetivo Avaliar a força de resistência à tração de diferentesmétodos de fixação tibial na reconstrução do ligamento anterolateral (LAL). Além disso, comparar os mecanismos de falha da fixação tibial dessa reconstrução em joelhos suínos. Métodos Foram usados 40 membros recém-congelados de suínos, divididos em quatro grupos de de
Rev. bras. ortop.. Publicado em: 03/06/2019
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7. Influence of Abutment Collar Height and Implant Length on Stress Distribution in Single Crowns
Resumo Este estudo avaliou a influência da altura da porção transmucosa do pilar protético com junção cone morse e do comprimento dos implantes no comportamento biomecânico coroas unitárias com diferentes proporção coroa-implante. Seis modelos virtuais (S11, M11, L11, S13, M13 e L13) foram construídos combinando pilares protéticos com transmucoso
Braz. Dent. J.. Publicado em: 03/06/2019
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8. Morse taper performance: A finite element analysis study
OBJECTIVES: To evaluate and compare the magnitude and distribution of stresses generated on implants, abutments and first molar metal-ceramic crowns using finite element analysis. METHODS: Preliminary three-dimensional models were created using the computer-aided design software SolidWorks. Stress and strain values were observed for two distinct virtual mo
Clinics. Publicado em: 25/03/2019
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9. Análisis de los elementos principales en el diseño de placas de bloqueo en una fractura de 2-partes del cuello quirúrgico del húmero utilizando MEF y análisis estadístico
ABSTRACT A large number of proximal humerus fractures are being treated with osteosynthesis. However, loss of reduction remains a serious problem and it can cause screw cutout at the humeral joint and reoperation. According to the interfragmentary strain theory, one should be aware of the balance between a flexible fixation, which stimulates callus formation
Matéria (Rio J.). Publicado em: 06/12/2018
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10. Influence of implantoplasty on stress distribution of exposed implants at different bone insertion levels
Abstract This study evaluated the effect of implantoplasty on different bone insertion levels of exposed implants. A model of the Bone Level Tapered implant (Straumann Institute, Waldenburg, Switzerland) was created through the Rhinoceros software (version 5.0 SR8, McNeel North America, Seattle, WA, USA). The abutment was fixed to the implant through a reten
Braz. oral res.. Publicado em: 07/12/2017
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11. TREATMENT OF SCAPHOID NONUNION WITH OLECRANON BONE GRAFT AND COMPRESSION SCREW
ABSTRACT Objective: To evaluate the outcome of olecranon bone graft and compression screw for the treatment of nonunion of the Lichtman type I scaphoid. Method: We evaluated 15 patients of 32 who underwent surgical treatment for nonunion of the Lichtman type I scaphoid with olecranon bone graft and screw compression. Results: We obtained 100% consolida
Acta ortop. bras.. Publicado em: 2016-06
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12. Application of bioabsorbable screw fixation for anterior cervical decompression and bone grafting
OBJECTIVES: To examine the application of bioabsorbable screws for anterior cervical decompression and bone grafting fixation and to study their clinical effects in the treatment of cervical spondylosis. METHODS: From March 2007 to September 2012, 56 patients, 36 males and 20 females (38-79 years old, average 58.3±9.47 years), underwent a novel operation.
Clinics. Publicado em: 2016-06