Segmental Stem Fracture of a Cemented Femoral Prosthesis

Jarvi, Kristiina; Kerry, R. M.

doi:10.1016/j.arth.2006.03.012

Cited by 13 publications

(8 citation statements)

References 8 publications

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“…Although fracture of the femoral stem is a documented complication of human total hip replacement, 12,13 resurfacing arthroplasty 14 and Zurich Cementless total hip replacement in the dog, to the authors' knowledge it has not been reported clinically after cemented total hip replacement in the dog. Bartel et al reported fracture of the neck of the femoral prosthesis, attributing the failure to inappropriate implant design during prosthesis development.…”

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confidence: 91%

Femoral component failure in canine cemented total hip replacement: a report of two cases

Yates

Wasik²,

Edwards³

2010

Aust Veterinary J

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Femoral stem fracture is reported as an uncommon late complication of cemented total hip replacement in two dogs. In each case surgical salvage was achieved by extirpation of the proximal unstable component of the femoral stem, resulting in acceptable limb function. To the authors' knowledge, intramedullary femoral stem failure has not been previously reported after cemented total hip replacement in the dog. Factors believed to have contributed to implant failure in these dogs are discussed and compared with the same complication in humans.

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confidence: 91%

Femoral component failure in canine cemented total hip replacement: a report of two cases

Yates

Wasik²,

Edwards³

2010

Aust Veterinary J

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“…Endoprosthesis stem fractures are among the rarest complications (Fig.1). The fractures of the endoprosthesis stem together with the shaft of the femoral bone are reported more often while isolated distal fractures of endoprosthesis stems occur much less frequently [11][12][13][14][15][16][17]. The case described in the relevant literature was a fracture in a patient which occurred 23 years after the primary implant procedure.…”

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confidence: 99%

Identification of the Cause of the Stem Neck Fracture in the Hip Joint Endoprosthesis

Ryniewicz

Bojko

Pałka

et al. 2018

International Journal of Applied Mechanics and Engineering

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Endoprosthesis stem fractures are among the rarest complications that occur after hip joint arthroplasty. The aim of this paper is to evaluate the causes of the fractures of the Aura II stem neck, which is an element of an endoprosthesis implanted in a patient. In order to achieve it, a radiogram was evaluated, the FEM analysis was carried out for the hip joint replaced using the Aura II prosthesis and scanning tests as well as a chemical analysis were performed for the focus of fatigue. The tests performed indicate that the most probable causes leading to the fatigue fracture of the Aura II stem under examination were material defects in the process of casting and forging (forging the material with delamination and the presence of brittle oxides and carbides) that resulted in a significant reduction of strength and resistance to corrosion. In the light of an unprecedented stem neck fracture, this information should be an indication for non-destructive tests of ready-made stems aiming to discover the material and technological defects that may arise in the process of casting and drop forging.

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“…Fractures have been reported in a variety of prosthetic designs and materials. The use of high-strength materials including forged cobalt chrome, titanium alloy and high-nitrogen stainless steel, as well as further development of stem design and stem geometry, have led to a reduction in the incidence of this complication, and the occurrence of fracture with modern femoral stems is now a very rare event [8][9][10][11]. The stem examined in this case study was manufactured from high nitrogen stainless steel (REX 734 grade, ASTM F 1586).…”

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confidence: 99%

Case Study and Failure Analysis of a total hip Stem Fracture

Mierzejewska

2015

Advances in Materials Science

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A total hip replacement is a procedure that requires removal of the affected joint lesions and replacing it with artificial elements. Nevertheless, like any invasive surgery, it is associated with the risk of complications, including joint infection, fracture of the bone during and after surgery, scarring and limitation of motion of the hip, and loosening of the prosthesis. In this work we present and describe the results of its investigations. In order to determine the mechanism of failure, a broken stem components were analyzed by means of macroscopic and microscopic observations and hardness measurements. The hardness, microstructure and chemical composition of the broken part of the hip stem were analyzed. Microscopic examination revealed numerous defects in material. Among them are pores and emptiness, located on the outskirts of the tested samples and a plurality of micro-cracking, debonding and delamination of the material due to the overloading of a fatigue character. There were no changes caused by intergranular corrosion or pitting, which may indicate for an even distribution of the major alloying components such as chromium and nickel. Observations of the material by using scanning electron microscopy (SEM), clearly proved that the destruction was caused by material fatigue. The investigation showed that the crack had originated due to a high stress concentration on the lateral corner section of the stem. Large surface of the fatigue crack zone area indicated for small stresses and small crack propagation velocities. There was a clear correlation between the grain size of the steel hardness. The results of hardness test revealed a significant increase hardness of stem in relation to the normative values. In addition, the measured average grain size is less than the standard accepted. Using Solid Works simulation and FEM a model of the stem was created and analyzed in terms of strength and rated the distribution of the generated stress. The finite-element analysis confirmed that there is the highest stress concentration in the middle of the stem

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Segmental Stem Fracture of a Cemented Femoral Prosthesis

Cited by 13 publications

References 8 publications

Femoral component failure in canine cemented total hip replacement: a report of two cases

Femoral component failure in canine cemented total hip replacement: a report of two cases

Identification of the Cause of the Stem Neck Fracture in the Hip Joint Endoprosthesis

Case Study and Failure Analysis of a total hip Stem Fracture

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