Search results for "Polyethylene wear"

showing 2 items of 2 documents

Optimal positioning of the humeral component in the reverse shoulder prosthesis.

2014

Total reverse shoulder arthroplasty is becoming more and more the standard therapeutic practice for glenohumeral arthropathy with massive lesions of the rotator cuff. The biomechanical principle of this prosthesis is represented by the reversion of the normal anatomy of the shoulder joint. This non-anatomical prosthesis leads to a medialization of the rotation centre of the glenohumeral joint and also to a distalization of the humeral head. All that causes a deltoid tension increasing so allowing a larger abduction of the arm. Main complications of the reverse shoulder prosthesis are due to the joint instability, the scapular notching and the wear of the polyethylene insert. The main goal o…

musculoskeletal diseasesmedicine.medical_specialtyFEM analysesmedicine.medical_treatmentReplacementDeltoid curveProsthesis DesignProsthesisArthroplastyArthropathymedicineHumansOrthopedics and Sports MedicineHumerusRotator cuffArthroplasty ReplacementSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialeTotal reverse shoulder arthroplasty Intrinsic stability FEM analyses Polyethylene wear Stability ratioFEM analyses; Intrinsic stability; Polyethylene wear; Stability ratio; Total reverse shoulder arthroplasty; Arthroplasty Replacement; Humans; Humerus; Prosthesis Design; Shoulder Joint; Orthopedics and Sports Medicine; Surgery; Medicine (all)business.industryShoulder JointMedicine (all)Intrinsic stabilityHumerusShoulder Prosthesismedicine.diseaseArthroplastySurgerymedicine.anatomical_structurePolyethylene wearStability ratioTotal reverse shoulder arthroplastySurgeryShoulder jointbusinesshuman activitiesMusculoskeletal surgery
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Viscoelastic material models for more accurate polyethylene wear estimation

2018

Wear debris from ultra-high-molecular-weight polyethylene components used for joint replacement prostheses can cause significant clinical complications, and it is essential to be able to predict implant wear accurately in vitro to prevent unsafe implant designs continuing to clinical trials. The established method to predict wear is simulator testing, but the significant equipment costs, experimental time and equipment availability can be prohibitive. It is possible to predict implant wear using finite element methods, though those reported in the literature simplify the material behaviour of polyethylene and typically use linear or elastoplastic material models. Such models cannot represe…

Materials scienceJoint replacementmedicine.medical_treatmentWear debris02 engineering and technologyfractional viscoelasticityViscoelasticityModeling and simulationchemistry.chemical_compound0203 mechanical engineeringmedicineMechanics of MaterialUnicompartmental knee arthroplastymaterial modelbusiness.industryApplied MathematicsMechanical EngineeringStructural engineeringPolyethylene021001 nanoscience & nanotechnologyStrength of materialsfinite element analysiFinite element method020303 mechanical engineering & transportschemistryMechanics of MaterialsPolyethylene wearModeling and Simulation0210 nano-technologybusinessunicompartmental knee arthroplasty
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