Search results for "Stability ratio"

showing 3 items of 3 documents

A new method to evaluate the influence of the glenosphere positioning on stability and range of motion of a reverse shoulder prosthesis

2019

Abstract Purpose Shoulder instability and reduced range of motion are two common complications of a total reverse shoulder arthroplasty. In this work, a new approach is proposed to estimate how the glenoid component positioning can influence the stability and the range of motion of a reverse shoulder prosthesis. Materials and methods A standard reverse shoulder prosthesis has been analysed. To perform virtual simulation of the shoulder-prosthesis assembly, all the components of the prosthesis have been acquired via a 3D laser scanner and the solid models of the shoulder bones have been reconstructed through CT images. Loads on the shoulder joint have been estimated using anatomical models d…

Range of MotionJoint Instabilitymusculoskeletal diseasesShoulderReverse shoulders prosthesismedicine.medical_treatmentReplacementGuidelines as TopicProsthesis DesignProsthesisInstability ratioArthroplasty03 medical and health sciencesCAD modelling &amp0302 clinical medicinemedicineHumansRange of Motion ArticularSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialeTomographyGeneral Environmental Science030222 orthopedicsROMShoulder Jointbusiness.industryCAD modelling & simulation; Digital shape acquisition; Instability ratio; Reverse shoulders prosthesis; ROM; Arthroplasty Replacement Shoulder; Case-Control Studies; Guidelines as Topic; Humans; Joint Instability; Prosthesis Design; Range of Motion Articular; Shoulder Dislocation; Shoulder Impingement Syndrome; Shoulder Joint; Shoulder Prosthesis; Tomography X-Ray ComputedShoulder DislocationWork (physics)Shoulder Prosthesis030208 emergency & critical care medicinesimulationShoulder ProsthesisArthroplastyX-Ray ComputedTilt (optics)medicine.anatomical_structureShoulder Impingement SyndromeArthroplasty Replacement ShoulderCase-Control StudiesShoulder Impingement SyndromeGeneral Earth and Planetary SciencesShoulder jointTomography X-Ray ComputedRange of motionbusinessDigital shape acquisitionCAD modelling & simulationArticularBiomedical engineeringInjury
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Numerical study of the components positioning influence on the stability of a reverse shoulder prosthesis

2014

Aim of this paper is to setup a novel procedure able to analyze performances of a reverse shoulder prosthesis when different geometrical configurations are assumed. Nowadays, such a prosthesis is widely used but, because of its novelty, data in literature give poor information about performances and limits to its applicability. The activity has been divided into the following steps. At the beginning the shape of the prosthesis has been digitally acquired via a 3D scanner. Then, CAD models of all prosthetic components have been geometrically optimized in a way to obtain final entities suitable for numerical simulations. After that, CAD assemblies have been created between prosthetic componen…

ScannerEngineeringEngineering drawingbusiness.industryCADStructural engineeringStability (probability)Industrial and Manufacturing EngineeringFinite element methodStability conditionsmedicine.anatomical_structureScapulaModeling and SimulationmedicineNon linear FEM analyses · 3D scanner acquisition · Reversed shoulder prosthesis · Shoulder stability ratioHumerusShoulder jointNon linear FEM analyses 3D scanner acquisition Reversed shoulder prosthesis Shoulder stability ratiobusinessSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria Industriale
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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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