Search results for "Digital shape acquisition"

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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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Redesign of a reverse shoulder prosthesis: Kinematic and mechanical study

2014

In this work a commercial reverse shoulder prosthesis has been redesigned to improve performances in terms of range of movements of the implant and stability to dislocation. A kinematic and mechanic study has been performed using a realistic solid model of the prothesised shoulder: in particular, all the components of the prosthesis have been acquired via a 3D laser scanner and inserted in a virtual humerus-glenoid system by reproducing the common surgical procedure. The final model has been used to measure the maximum angles of abduction and rotation of the arm and the shear forces that cause dislocation. Modifications proposed to the commercial prosthesis are: a different orientation of t…

Reverse shoulder prosthesiEngineering (all)CAD modellingDigital shape acquisition
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