In Vitro Analysis of Exeter Stem Torsional Stability

Bell, Cameron G.; Weinrauch, Patrick C.; Pearcy, Mark J.; Crawford, Ross

doi:10.1016/j.arth.2007.03.012

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…A loaded, polished taper stem on the other hand, must be able to move within it’s cement mantle to function as a loaded taper. The load is transmitted from the prosthetic head and forces the taper to subside within the cement mantle, creating radial compressive forces within cement and hoop stresses within bone, thus minimizing proximal stress shielding [46]. Thus these two biomechanical systems require different prosthesis-cement interfaces, a perfect stem-cement bond for the composite beam system but no bond between the stem and cement in the taper slip design [47].…”

Section: Discussionmentioning

confidence: 99%

Basic Science Considerations in Primary Total Hip Replacement Arthroplasty

Mirza¹,

Dunlop²,

Panesar³

et al. 2010

TOORTHJ

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Total Hip Replacement is one of the most common operations performed in the developed world today. An increasingly ageing population means that the numbers of people undergoing this operation is set to rise. There are a numerous number of prosthesis on the market and it is often difficult to choose between them. It is therefore necessary to have a good understanding of the basic scientific principles in Total Hip Replacement and the evidence base underpinning them. This paper reviews the relevant anatomical and biomechanical principles in THA. It goes on to elaborate on the structural properties of materials used in modern implants and looks at the evidence base for different types of fixation including cemented and uncemented components. Modern bearing surfaces are discussed in addition to the scientific basis of various surface engineering modifications in THA prostheses. The basic science considerations in component alignment and abductor tension are also discussed. A brief discussion on modular and custom designs of THR is also included. This article reviews basic science concepts and the rationale underpinning the use of the femoral and acetabular component in total hip replacement.

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Section: Discussionmentioning

confidence: 99%

Basic Science Considerations in Primary Total Hip Replacement Arthroplasty

Mirza¹,

Dunlop²,

Panesar³

et al. 2010

TOORTHJ

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“…Nabors et al 2 conducted a 10-year clinical follow-up on 24 cases of acetabular revision, in which force-closed stems were removed and reinserted. Nabors et al 2 and Bell et al 3 also evaluated the rotational stability of the stems through mechanical tests and did not find any evident loss of stem stability caused by the reinsertion. Nonetheless, changes at the interface between the stem and cement may occur after stem reinsertion.…”

Section: Introductionmentioning

confidence: 99%

Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty

Griza

Gomes

Cervieri

et al. 2016

Revista Brasileira de Ortopedia (English Edition)

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ObjectivesThis study investigated removal of a force-closed stem, done in order to improve acetabular exposure during revision, with reinsertion afterwards. It is unknown how much this procedure modifies the stem/cement interface.MethodsThree tapered stem models were implanted into composite femurs. Strain gauges were embedded in the medial aspect of the cement mantle and in several positions on the outer surface of the femurs. The deformation was measured during static loading, which was applied at two different times: after implantation and after one million loading cycles, followed by stem removal and reinsertion. The t test was performed. The differences in deformation were compared (at p ≤ 0.05) between the two static loading times and among the three stem designs.ResultsNo significant differences in deformation were found after the two loading times for the three models. No significant differences in the initial deformations of the three models were found for most of the gauges attached to the femurs.ConclusionsReinsertion of the force-closed stem does not alter the load transmission from the stem to the cement and to the surface of the femur, even after one million loading cycles.

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How to Do a Cemented Total Hip Arthroplasty

García-Cimbrelo

2009

European Instructional Lectures

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In Vitro Analysis of Exeter Stem Torsional Stability

Cited by 8 publications

References 10 publications

Basic Science Considerations in Primary Total Hip Replacement Arthroplasty

Basic Science Considerations in Primary Total Hip Replacement Arthroplasty

Effect of removal and reinsertion of force-closed stems on deformation of total hip arthroplasty

How to Do a Cemented Total Hip Arthroplasty

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