Revisões femorais de artroplastias totais do quadril com afrouxamentos assépticos e fraturas periprotéticas: análise de 49 casos tratados com haste de Wagner

Drumond, Sergio Nogueira; Drumond, Fernando Corradi Fonseca; Maranhão, Bruno Kaehler de Albuquerque; Cruz, Leonardo Corradi Rodrigues La

doi:10.1590/s0102-36162007000700005

Cited by 2 publications

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References 16 publications

(26 reference statements)

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“…However, several complications linked to this procedure, such as implant migration, aseptic loosening or osteolysis, are still common in the medium and long term 6,7 . This emphasizes the need for revision surgery, especially in today's context of longer life expectancy and with younger patients requiring hip replacement surgery 8,9 . All these complications result from proximal adaptive bone remodeling, which is widely known as the stress shielding phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Numerical evaluation of reduction of stress shielding in laser coated hip prostheses

Antonialli

Bolfarini

2011

Mat. Res.

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The increasing use of titanium alloys as biomaterials can be attributed, among other factors, to their low Young modulus compared to other alloys with similar mechanical strength. However, Ti-6Al-4V alloy, the alloy most widely used in implants, has a stiffness of about 110 GPa, which is much higher than the typical stiffness of 20 GPa of human bone. In the specific case of hip arthroplasty, this difference in stiffness reduces the load imposed on the femur through the stress shielding phenomenon, which, in the medium term, usually results in the loss of bone density. One way to reduce this phenomenon is by using TiNbTaZr (TNTZ) alloys, which have a stiffness of about 47 GPa. This work uses numerical simulation to evaluate the effectiveness of TNTZ laser coated on a Ti-6Al-4V hip prosthesis in reducing stress shielding. The results show that this may improve the performance of the prosthesis, extending its service life.

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Section: Introductionmentioning

confidence: 99%

Numerical evaluation of reduction of stress shielding in laser coated hip prostheses

Antonialli

Bolfarini

2011

Mat. Res.

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“…The aim of femoral reconstructions and fixation of periprosthetic fractures is to achieve a stable implant, with maintenance or replacement of the bone stock 12 , 13 . The treatment options include cemented or non-cemented nails, which may be used together with autologous or homologous bone grafts 14 , 15 . The use of structural homologous bone grafts enables high fracture consolidation rates and increased femoral bone stock 3 , 16 .…”

Section: Introductionmentioning

confidence: 99%

Use of Cortical Structural Homologous Bone Graft in Femoral Reconstructive Surgery

Roos

Giora

et al. 2010

Revista Brasileira de Ortopedia (English Edition)

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To perform a clinical and radiographic assessment of patients undergoing surgical treatment using a cortical structural homologous bone graft for femoral reconstruction following mechanical failure of total hip arthroplasty and periprosthetic fractures. Methods: A retrospective study was conducted on 27 patients who underwent surgical treatment for femoral reconstruction following mechanical failure of total hip arthroplasty (12 cases) and periprosthetic fractures (15 cases), using a cortical structural homologous bone graft and cemented implants, between June 1999 and February 2008. Of these, 21 fulfilled all the criteria required for this study. The patients underwent pre and postoperative clinical assessments using the Harris Hip Score. Preoperative, immediate postoperative and late postoperative radiographs were also evaluated, with comparisons of fracture consolidation, radiographic signs of graft consolidation, changes to the bone stock and femoral bone quality, and femoral alignment. Results: Nine patients (42.9%) underwent femoral reconstruction following mechanical failure of total hip arthroplasty and 12 cases (57.1%) underwent femoral reconstruction following periprosthetic fracture. Regarding the postoperative clinical classification, the results were considered satisfactory in 85.7% of the cases and unsatisfactory in 14.3%. Radiographic signs of graft consolidation were seen in all cases. There was an increase in bone stock in 90.5% of the hip reconstructions, as measured by the cortical index. Furthermore, the changes to femoral bone quality were considered good in 66.7% of the cases. Conclusion: The use of cortical structural homologous bone grafts for both femoral reconstructive surgery on total hip arthroplasty and periprosthetic fractures is a good treatment option for selected cases, enabling satisfactory clinical and radiographic results.

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Revisões femorais de artroplastias totais do quadril com afrouxamentos assépticos e fraturas periprotéticas: análise de 49 casos tratados com haste de Wagner

Cited by 2 publications

References 16 publications

Numerical evaluation of reduction of stress shielding in laser coated hip prostheses

Numerical evaluation of reduction of stress shielding in laser coated hip prostheses

Use of Cortical Structural Homologous Bone Graft in Femoral Reconstructive Surgery

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