Abstract:
Objective:To evaluate the mechanical behavior of the proximal end of the femur submitted to the X-shaped polymethylmethacrylate (PMMA) reinforcement technique. Methods:Fifteen synthetic femurs, with a Nacional® density of 10 PCF, were divided into two groups: the DX group, with 5 units that were submitted to PMMA reinforcement, and the DP group, with 10 units, which were evaluated intact. The volume of PMMA required, the maximum load, and the absorbed energy to fracture were analyzed by means of a static mechanical bending test simulating a fall on the greater trochanter. Results:A mean of 6 ml of PMMA was used to model the X-reinforcement; it was observed that the DX group presented significantly higher maximum load (median = 1553 N, p = 0.005) and absorbed energy to fracture (median = 9.7 J; p = 0.050) than the DP group (median = 905 N and 6.6 J). Conclusion:X-reinforcement of the proximal end of synthetic femurs showed a statistically significant increase in the maximum load and absorbed energy to fracture in the mechanical assay when compared to the control group. Level of Evidence III, Experimental study. Objetivo:Avaliar o comportamento mecânico da extremidade proximal do fêmur submetido à técnica de reforço com polimetilmetacrilato (PMMA) em forma de X. Métodos:Foram utilizados 15 fêmures sintéticos, com densidade de 10 PCF da Nacional®, divididos nos grupos DX, com 5 unidades submetidas ao reforço com PMMA, e DP com 10 unidades, avaliados com sua integridade intacta. Foram analisados o volume de PMMA necessário, os valores da carga máxima e a energia absorvida até a fratura por meio de ensaio mecânico estático de flexão, simulando queda sobre o trocanter maior. Resultados:Foram usados em média 6 ml de PMMA para a modelagem do reforço em X e observou-se que o grupo DX apresentou carga máxima (mediana = 1553 N; p = 0,005) e energia absorvida até fratura (mediana = 9,7 J; p = 0,050) significativamente maior que o grupo DP (mediana = 905 N e 6,6 J). Conclusão:O reforço em X da extremidade proximal de fêmures sintéticos apresentou incremento estatisticamente significativo da carga máxima e energia absorvida até a fratura no ensaio mecânico em comparação com o grupo controle. Nível de evidência III, Estudo experimental.
journal_name
Acta Ortop Brasjournal_title
Acta ortopedica brasileiraauthors
Freitas A,Camargo WS,Aquino RJ,Giordano V Neto,Bonavides AF Junior,Shimano ACdoi
10.1590/1413-785220182604187691subject
Has Abstractpub_date
2018-01-01 00:00:00pages
231-235issue
4eissn
1413-7852issn
1809-4406pii
1413-785220182604187691journal_volume
26pub_type
杂志文章abstract:OBJECTIVE:The influence of dose of low power lasertherapy (AsGaAl, 830 nm) on the regeneration of the fibular nerve of rats after a crush injury was evaluated by means of the functional gait analysis and histomorphometric parameters. METHODS:Controlled crush injury of the right common fibular nerve, immediately follow...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522013000500005
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVE:To compare the value of Q angle in different positions, in the external and internal rotations of lower limbs. METHODS:This is a descriptive cross-sectional study. We have evaluated 62 volunteers, 32 women and 30 men in the following positions: supine positions with parallel feet, supine with abduction (exte...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-78522014220600451
更新日期:2014-01-01 00:00:00
abstract:OBJECTIVE:To determine whether there is a difference on the bone architecture in patients with femoral neck fracture compared to patients with intertrochanteric fractures and assess the importance of aging on bone microarchitecture in patients with proximal femoral fracture. METHODS:Biopsy of the iliac crest was made ...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-78522015230201056
更新日期:2015-03-01 00:00:00
abstract:Objective:To analyze 10 consecutive cases of microsurgical arteriovenous loops created to reconstruct complex injuries from March 2011 to May 2012. Methods:This observational cohort-type study conducted by the Hand and Microsurgery Group at the HC-FMUSP included patients who were candidates for microsurgical reconstru...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220182602187220
更新日期:2018-03-01 00:00:00
abstract:OBJECTIVE:To evaluate and to compare the Spaso and Kocher reduction maneuvers in terms of efficiency, time of reduction, facileness, pain, discomfort to the patient, complications and risks, besides promoting the comparison between the two maneuvers, aiming to ground the emergency conduct. METHODS:A prospective study ...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-78522015230400701
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVE:To report clinical and epidemiological characteristics and risk factors of patients with Carpal Tunnel Syndrome (CTS) on sick leave admitted in a University Hospital. METHODS:This is a transversal study conducted with patients admitted sequentially over 18 years of age, without distinction of gender and race...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220152305145784
更新日期:2015-09-01 00:00:00
abstract:Objective:To compare postoperative radiographic outcomes of Schatzker type V and VI tibial plateau fractures treated with double-plate or single lateral locked plate. Methods:Sixty-three patients operated from December 2011 to February 2016 were selected, 47 from the double-plate group and 16 from the single lateral l...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220202804233122
更新日期:2020-07-01 00:00:00
abstract:Objective:This study aims to establish the current panorama of the anterior cruciate ligament reconstruction surgery in Brazil. Methods:A survey that consisted of a 24-item questionnaire including surgeon's demographics, preferred technique, graft selection, graft positioning, use of braces, drains, antibiotic prophyl...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220192703182208
更新日期:2019-05-01 00:00:00
abstract:OBJECTIVES:Ginkgo biloba extract (EGb 761) is a plant extract obtained from the leaves of the G. biloba tree. The aim of this study was to assess the histological and radiological effects of G. biloba extract on fracture healing in an experimental fracture model using rat femurs. METHODS:Forty-eight female Sprague-Daw...
journal_title:Acta ortopedica brasileira
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更新日期:2017-05-01 00:00:00
abstract:Objective:To evaluate the association between bone mineral density (BMD) and body composition in healthy older adults at different skeletal sites. Methods:We analyzed 87 medical records and BMD along with the body composition of men ranging from 60 to 87 years of age (mean: 68.5, standard deviation: 6.5). Inclusion cr...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
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更新日期:2018-01-01 00:00:00
abstract:Objective:To analyze and follow-up patients previously selected by pediatricians at the time of birth who presented altered initial physical examination results to identify the pathological changes in their hips. Methods:A prospective cohort study was conducted involving 34 newborns (68 hips) out of a total of 1273 li...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220192706220630
更新日期:2019-11-01 00:00:00
abstract:OBJECTIVES:To examine the cellularity and thickness of the articular cartilage of the femur in rats with arthritis after treatment with iontophoresis. METHODS:To evaluate these objectives, a histological analysis was performed on hematoxylin and eosin, where cellularity and cartilage thickness were observed and evalua...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-78522014220400769
更新日期:2014-01-01 00:00:00
abstract:OBJECTIVE:To investigate the influence of low intensity laser irradiation on the regeneration of the fibular nerve of rats after crush injury. METHODS:Twenty-five rats were used, divided into three groups: 1) intact nerve, no treatment; 2) crushed nerve, no treatment; 3) crush injury, laser irradiation applied on the ...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522013000200005
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVES:: To evaluate clinically and radiologically the elbows of spinal cord injured patients and compare them to the control group. METHODS:: Twenty patients (10 paraplegics and 10 tetraplegics) were clinically evaluated through assessment of pain scale, measurement of active and passive range of motion, degree o...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220162402154665
更新日期:2016-03-01 00:00:00
abstract:OBJECTIVE:: Analyze the effects of physical exertion during a soccer match on the functional capacity and stability of the lower limbs of young soccer players. METHODS:: We analyzed 10 soccer players who underwent functional capacity assessment of the lower limbs by a Hop Test protocol and evaluation of the level of p...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522013000300005
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:To determine intra and interobserver agreement of the grading system for femoral cementation in hip arthroplasty proposed by Barrack. METHODS:Immediate anteroposterior and lateral postoperative radiographs of 55 primary total hip arthroplasties were assessed by two observers familiar with the use of this gra...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522013000100006
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVE:To study the shoulder of this group of patients using magnetic resonance imaging to detect clinical and subclinical disorders and establish a rehabilitation program. METHODS:Nine patients with spinal cord injury followed in the Laboratory of Biomechanics and Rehabilitation of the Locomotive System at HC/UNIC...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522012000500009
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVES:The aim of the treatment of tibial plateau fractures is to obtain a pain-free and fully functional knee with closed reduction, percutaneous cannulated screw fixation and hexapodal external fixator reconstruction for high energy compound upper tibial fractures. METHODS:Patients with comminuted tibial plateau...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522014000100008
更新日期:2014-01-01 00:00:00
abstract::The use of intramedullary nailing to treat proximal femoral fractures has increased in recent years. Nail breakage is a rare complication of intramedullary nailing of the femur, and generally occurs at the non-united fracture site. Removal of the distal fragment of a broken nail is a challenging problem. In this artic...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220182601148079
更新日期:2018-01-01 00:00:00
abstract:Objective:To evaluate the radiation dose received by staff in spine surgeries, including those who are not considered occupationally exposed workers. Methods:All spinal surgeries performed in the same department during a period of 12 months were evaluated with regard to the exposure of surgeons, scrub nurses, and auxi...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220192701172722
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE:To determine whether training on shoulder and elbow surgery influences the orthopedist surgeons' preferred technique to address acute acromioclavicular joint dislocation (ACD). METHODS:A survey was conducted with shoulder and elbow specialists and general orthopedists on their preferred technique to address ...
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更新日期:2016-09-01 00:00:00
abstract:Objectives:To evaluate the regenerative capacity of gracilis (G) and semitendinosus (ST) tendons, to examine the sensitivity and specificity of signs and symptoms in the assessment of hamstring tendons, and to assess the thickness and insertion site of regenerated tendons. Methods:Thirty sequential knees were subjecte...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
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更新日期:2018-01-01 00:00:00
abstract:Objective:To compare the widening of bone tunnels between poly-etheretherketone (PEEK), absorbable polylactic acid DL (PLDL) and tricalcium phosphate (TCP) interference screws in anterior cruciate ligament (ACL) reconstruction. Methods:Three groups of patients undergoing ACL reconstruction with at least 1 year of foll...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220182605199995
更新日期:2018-01-01 00:00:00
abstract:Objective:It is difficult to achieve proper alignment after total knee arthroplasty (TKA) in patients with extra-articular deformity (EAD) because of altered anatomical axis and distorted landmarks. As of this writing, only case series have been reported with regard to the usefulness of computer-assisted navigation sys...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220182603178367
更新日期:2018-05-01 00:00:00
abstract::Due to the high physical and psychological demands of their work, musicians have a high risk of developing a range of health problems. The main causes of musculoskeletal disorders seen in instrumentalists are overuse, nerve compression and focal dystonia. The aim of this paper is to identify the musculoskeletal disord...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章,评审
doi:10.1590/S1413-78522012000100009
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:To assess the adequacy to the Brazilian population of orthopedic implants used for treatment of proximal femoral fractures. METHODS:The neck-shaft angle of the femur of 101 patients was measured in anteroposterior pelvis radiographs and these measurements were correlated to gender, age, height, weight and et...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220162406158264
更新日期:2016-11-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the functional results, complications, and morbidity and mortality rates in patients with end-stage chronic renal failure (ESCRF) with collum femoris fractures who were treated with hemiarthroplasty. METHODS:From 2005 to 2013, patients with ESCRF admitted to our hospital...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/1413-785220172505167473
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the value of post-treatment follow-up in osteosarcoma patients. METHODS:Data were collected through a clinical record, with socio-demographic and clinical data, and information relating to the medical appointment. Descriptive analysis of the data was carried out. The Chi-squared test was used to ...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522012000400009
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:To establish the radiographic images of the femoral insertion of the posterior cruciate ligament (PCL), in order to assist the creation of anatomical femoral tunnels during surgeries, and to be used as parameters in postoperative evaluation of the location of these tunnels. METHODS:Thirty adult cadaver knees...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
doi:10.1590/S1413-78522013000600005
更新日期:2013-01-01 00:00:00
abstract:Objective:To evaluate the age in which the secondary ossification centers of the elbow appear and fuse in the Brazilian population. Methods:Nearly thirty radiographs were randomly selected for each age group from 0 to 18 years, with a total of 544 radiographs from 439 patients, between 2010 and 2015, without abnormali...
journal_title:Acta ortopedica brasileira
pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00