Biomechanical Testing
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. A biomechanical study on proximal junctional kyphosis following long-segment posterior spinal fusion
Posterior long-segment spinal fusion may lead to proximal junctional kyphosis (PJK). The present study sought to identify the appropriate fusion levels required in order to prevent PJK using finite element analysis. A finite element model was constructed based on the whole-spine computed tomography findings of a healthy adult. Nine commonly used posterior sp
Braz J Med Biol Res. Publicado em: 25/04/2019
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2. Resistance training and hormone replacement increase MMP-2 activity, quality and quantity of bone in ovariectomized rats
Abstract AIMS The aim of the present study was to investigate the influence of resistance training (RT) and hormone replacement (HR) on MMP-2 activity, biomechanical and physical properties bone of ovariectomized (OVX) rats. METHODS Sprague-Dawley female rats were grouped into six experimental groups (n = 11 per group): sham-operated sedentary (SHAM Sed),
Motriz: rev. educ. fis.. Publicado em: 21/12/2017
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3. Synthesis, characterization and cytotoxicity of Chitosan/Polyvinyl Alcohol/Bioactive Glass hybrid scaffolds obtained by lyophilization
ABSTRACT One of the important research topics in tissue engineering is the development of optimum three-dimensional scaffolds for regeneration and growth of bone tissue. The scaffold developed should promote an initial biomechanical support, provide the formation, deposition and organization of the new organic matrix generated, and degrade proportionally to
Matéria (Rio J.). Publicado em: 2016-12
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4. Biomechanical Analysis of Locking Reconstruction Plate Using Mono- or Bicortical Screws
This experimental in vitro study evaluated the influence of screw length on the mechanical properties of a locking reconstruction plate designed with locking rings inserted into plate holes. Synthetic bone cylinders with 10 mm fracture gap and seven-hole locking reconstruction plates were used. Two groups of bone-plate constructs were assembled: Group 1 –
Mat. Res.. Publicado em: 08/04/2016
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5. Biomechanical study of the sacroiliac fracture fixation with titanium rods and pedicle screws
OBJECTIVES: To assess biomechanically different fixations means of the sacroiliac joint with pedicle screws and to compare the traditional head height with reduced ones. METHODS: We used a polyethylene model representing the pelvic ring and simulated a unilateral sacroiliac dislocation. We set up three different constructions: 1) two screws attached to a ro
Acta ortop. bras.. Publicado em: 2015-06
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6. Mechanical analysis of femoral neck fracture fixation with dynamic condylar screw in synthetic bone
Objective: To analyze statistically results in biomechanical testing of fixation of femoral neck Pauwels type III fractures, on synthetic bone, with dynamic condylar screw (DCS) and control group. Methods: Ten synthetic bones of a national brand were used. Test Group: fixation was performed after osteotomy at 70o tilt using DCS plate with four holes. W
Acta ortop. bras.. Publicado em: 2014-10
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7. Biomechanical comparison of the four-strand cruciate and Strickland techniques in animal tendons
OBJECTIVE: The objective of this study was to compare two four-strand techniques: the traditional Strickland and cruciate techniques. METHODS: Thirty-eight Achilles tendons were removed from 19 rabbits and were assigned to two groups based on suture technique (Group 1, Strickland suture; Group 2, cruciate repair). The sutured tendons were subjected to con
Clinics. Publicado em: 2013-12
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8. Biomechanical analysis on different fixation techniques for treatment of mandibular body fractures
AIM: To biomechanically analyze two fixation techniques in polyurethane hemi-mandibular body fractures, using a universal testing machine. METHODS: The study employed 10 polyurethane hemi-mandible replicas, which simulated simple fractures of the mandibular body, divided into two groups: one group comprised 5 hemi-mandibles with two 2.0 mm system plates in t
Braz. J. Oral Sci.. Publicado em: 2013-06
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9. The effects of alpha-tocopherol supplementation on fracture healing in a postmenopausal osteoporotic rat model
OBJECTIVE: Osteoporosis increases the risk of bone fractures and may impair fracture healing. The aim of this study was to investigate whether alpha-tocopherol can improve the late-phase fracture healing of osteoporotic bones in ovariectomized rats. METHOD: In total, 24 female Sprague-Dawley rats were divided into three groups. The first group was sham-opera
Clinics. Publicado em: 2012-09
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10. Biomechanical in vitro evaluation of three stable internal fixation techniques used in sagittal osteotomy of the mandibular ramus: a study in sheep mandibles
Among the osteotomies performed in orthognathic surgery, the sagittal osteotomy of the mandibular ramus (SOMR) is the most common, allowing a great range of movements and stable internal fixation (SIF), therefore eliminating the need of maxillomandibular block in the postoperative period. OBJECTIVES: The purpose of this study was to evaluate the biomechanica
J. Appl. Oral Sci.. Publicado em: 2012-08
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11. Primary fixation of mini slings: a comparative biomechanical study in vivo
INTRODUCTION AND OBJECTIVES: The mini sling concept for stress urinary incontinence is an anatomical approach that involves placing a midurethral low-tension tape anchored to the obturator internus muscles bilaterally. They overcome the blind passage of long needles and all the related complications. There are many different devices available and because the
International braz j urol. Publicado em: 2012-04
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12. Hormônio do crescimento no processo de osseointegração de implantes de titânio: estudo experimental e revisão de literatura / Growth hormone on the osseointegration process of titanium implants: an experimental study and review of literature
In order to accelerate and improve the quality of the osseointegration process has recently been given emphasis to growth factors. Thus, this thesis was aimed to evaluate the use of growth hormone (GH) on osseointegration of titanium implants. This thesis is composed of two papers, the first chapter is a review of literature on the use of growth factors, and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2011