Complications of hip arthroplasty causing periprosthetic radiolucency on plain radiographs.

Tigges, Stefan; Stiles, R G; Roberson, James R.

doi:10.2214/ajr.162.6.8192005

Cited by 55 publications

(26 citation statements)

References 3 publications

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“…Titanium alloy offers many favourable properties, such as good biocompatibility, no allergenicity and a moderate elastic modulus (~110 GPa) [3], which, however, is still much higher than that of the adjacent bone stock (typically, 10-20 GPa [4]). This phenomenon known as stiffness mismatch can result in stress shielding [5,6], which has been identified as a cause for the aseptic loosening of orthopaedic implants, the main cause of their failure [7,8]. In order to reduce the risk of stress shielding, metal alloy implant components can be fabricated for instance with open-porous structures that provide an elastic modulus low enough for this specification [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Specific Yielding of Selective Laser-Melted Ti6Al4V Open-Porous Scaffolds as a Function of Unit Cell Design and Dimensions

Weißmann

Wieding

Hansmann

et al. 2016

Metals

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Bone loss in the near-vicinity of implants can be a consequence of stress shielding due to stiffness mismatch. This can be avoided by reducing implant stiffness, i.e., by implementing an open-porous structure. Three open-porous designs were therefore investigated (cubic, pyramidal and a twisted design). Scaffolds were fabricated by a selective laser-melting (SLM) process and material properties were determined by conducting uniaxial compression testing. The calculated elastic modulus values for the scaffolds varied between 3.4 and 26.3 GP and the scaffold porosities between 43% and 80%. A proportional linear correlation was found between the elastic modulus and the geometrical parameters, between the elastic modulus and the compressive strengths, as well as between the strut width-to-diameter ratio (a/d) and elastic modulus. Furthermore, we found a power-law relationship between porosity and the modulus of elasticity that characterizes specific yielding. With respect to scaffold porosity, the description of specific yielding behaviour offers a simple way to characterize the mechanical properties of open-porous structures and helps generate scaffolds with properties specific to their intended application. A direct comparison with human bone parameters is also possible. We generated scaffolds with mechanical properties sufficiently close to that of human cortical bone.

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Section: Introductionmentioning

confidence: 99%

Specific Yielding of Selective Laser-Melted Ti6Al4V Open-Porous Scaffolds as a Function of Unit Cell Design and Dimensions

Weißmann

Wieding

Hansmann

et al. 2016

Metals

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“…Radiolucent lines in hip replacements have been analysed over the past 30 years so that we can better understand prosthesis survival and septic as well as aseptic loosening of the components [9,20]. Several concordance and reproducibility studies have been performed, either for the femoral component [6] or for the acetabular component [12].…”

Section: Discussionmentioning

confidence: 99%

“…The presence of radiolucent lines around prosthetic components of any joint arthroplasty has been attributed to poor cement technique, component design, surgical technique, bone quality, component stability or prosthesis mismatch [6,9,12,20]. Nevertheless, progressive increase in the width of a radiolucent line has commonly been correlated with component loosening.…”

Section: Discussionmentioning

confidence: 99%

“…While the significance and clinical correlation of size and location of radiolucent lines is still unknown, the progression of a radiolucent line over time has been commonly associated with component loosening [8]. The rate of radiolucent lines observed is extremely variable from one study to another, making the comparison of related factors more difficult [2,4,8,16,20,22].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of radiolucent lines in cemented shoulder hemi-arthroplasties: study of concordance and reproducibility

Torrens

Martínez-Díaz

Ruiz

et al. 2007

International Orthopaedics (SICO

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We report on the concordance and reproducibility of the evaluation of radiolucent lines in the humeral component of shoulder arthroplasty. Thirty-two shoulder prostheses were assessed independently, on two occasions, by five observers. The level of inter-and intra-observer agreement was calculated using the kappa statistic. Intraobserver agreement: the overall kappa values ranged from 0 to 0.6, meaning poor, fair and moderate agreement levels. Interobserver agreement: when the anteroposterior (AP) views were analysed, the values obtained for the bone-cement interface ranged from 0.290 to 0.539, meaning a poor-tomoderate agreement. For the cement-implant interface, the values ranged from 0.064 to 0.684, meaning a poor-to-good agreement. When radiolucent lines of the humeral component were analysed, inter-observer agreement proved to be as low as that obtained when total hip or knee components were analysed. Intra-observer agreement showed better results.

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“…Although dislocation can also occur as a late complication, it is most common in the immediate postoperative period (Manaster, 1996). Late complications include failure of any of the components of the prosthesis, mechanical (aseptic) loosening, bone fracture, heterotopic ossification (bone formation), loosening following infection and osteolysis (also termed aggressive granulomatosis or debris synovitis) (Tigges et al, 1994). In approximately 20% of patients, the artificial hip becomes loose within 20 years after implantation (Doorn et al, 1996a, Doorn et al, 1996b while aseptic loosening in THR accounts for approximately 75% of revision procedures (Amstutz et al, 1992).…”

Section: Why Do Implanted Artificial Hips Fail After All?mentioning

confidence: 99%

The Genotoxic Potential of Novel Materials Used in Modern Hip Replacements for Young Patients

Tsaousi¹

2012

Orthopedic Surgery

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Complications of hip arthroplasty causing periprosthetic radiolucency on plain radiographs.

Cited by 55 publications

References 3 publications

Specific Yielding of Selective Laser-Melted Ti6Al4V Open-Porous Scaffolds as a Function of Unit Cell Design and Dimensions

Specific Yielding of Selective Laser-Melted Ti6Al4V Open-Porous Scaffolds as a Function of Unit Cell Design and Dimensions

Assessment of radiolucent lines in cemented shoulder hemi-arthroplasties: study of concordance and reproducibility

The Genotoxic Potential of Novel Materials Used in Modern Hip Replacements for Young Patients

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