Background. Reversed shoulder arthroplasty is an accepted treatment for glenohumeral arthritis associated to rotator cuff deficiency. For most reversed shoulder prostheses, the baseplate of the glenoid component is uncemented and its primary stability is p ...

Elsevier2010

A musculoskeletal shoulder model based on pseudo-inverse and null-space optimization

Dominique Pioletti, Denis Gillet, Philippe Müllhaupt, Alexandre Terrier, Yvan Michellod, Alain Farron, Martin Aeberhard

The goal of the present work was assess the feasibility of using a pseudo-inverse and null-space optimization approach in the modeling of the shoulder biomechanics. The method was applied to a simplified musculoskeletal shoulder model. The mechanical syste ...

Elsevier2010

Biomechanical consequences of humeral component malpositioning after anatomical total shoulder arthroplasty

Dominique Pioletti, Alexandre Terrier, Alain Farron, Francesco Merlini, Silvio Ramondetti

Hypothesis: We hypothesized that the malpositioning of the humeral component can preclude the long-term success of anatomical total shoulder arthroplasty. The goal of this study was to evaluate the mechanical consequences of superior and inferior malpositi ...

Elsevier2010

Anesthesia prevents auditory perceptual learning

Alain Farron, Michael Herzog, Elisa Tartaglia, Carl Kristoffer Aberg

BACKGROUND: An auditory perceptual learning paradigm was used to investigate whether implicit memories are formed during general anesthesia. METHODS: Eighty-seven patients who had an American Society of Anesthesiologists physical status of I-III and were s ...

Lippincott, Williams & Wilkins2009

Comparison of polyethylene wear in anatomical and reversed shoulder prostheses

Dominique Pioletti, Alexandre Terrier, Alain Farron, Francesco Merlini

Wear of polyethylene is associated with aseptic loosening of orthopaedic implants and has been observed in hip and knee prostheses and anatomical implants for the shoulder. The reversed shoulder prostheses have not been assessed as yet. We investigated the ...

2009

Total shoulder arthroplasty: Downward inclination of the glenoid component to balance supraspinatus deficiency

Dominique Pioletti, Alexandre Terrier, Alain Farron, Francesco Merlini

Hypothesis: Supraspinatus deficiency associated with total shoulder arthroplasty (TSA) provokes eccentric loading and may induce loosening of the glenoid component. A downward inclination of the glenoid component has been proposed to balance supraspinatus ...

2009

Simulated joint and muscle forces in reversed and anatomic shoulder prostheses

Adrian Reist, Alexandre Terrier, Alain Farron, Francesco Merlini

Reversed shoulder prostheses are increasingly being used for the treatment of glenohumeral arthropathy associated with a deficient rotator cuff. These non-anatomical implants attempt to balance the joint forces by means of a semi-constrained articular surf ...

2008

Objectivation de l’activité de l’épaule saine et pathologique par des mesures cinématiques en trois dimension de longues durée

Kamiar Aminian, Brian Coley, Alain Farron, Brigitte Jolles-Haeberli

2008

Does reversed prostheses increase humeral stress?

Alexandre Terrier, Alain Farron, Francesco Merlini

Gordon and Breach Pub.2008

Outcome evaluation in shoulder surgery using 3D kinematics sensors

Kamiar Aminian, Brian Coley, Alain Farron

A new method of scoring systems for the functional assessment of the shoulder is presented. 3D accelerometers and gyroscopes attached on the humerus were used to differentiate a healthy from a painful shoulder. The method was first tested on 10 healthy vol ...

2007

An algorithm to allow humerus translation in the indeterminate problem of shoulder abduction

Alexandre Terrier, Arne Christian Vogel, Alain Farron, Massimiliano Capezzali

The shoulder is one of the most complex joints of the human body, mainly because of its large range of motion, but also because of its active muscular stabilisation. Actually, the numerous stabilizing muscles and degrees of freedom yield indeterminate biom ...

2007

Effect of supraspinatus deficiency on humerus translation and glenohumeral contact force during abduction

Adrian Reist, Alexandre Terrier, Arne Christian Vogel, Alain Farron

BACKGROUND: Supraspinatus deficiency is the most frequent and important problem associated to rotator cuff pathologies. It reduces shoulder stability and can lead to osteoarthritis. The goal of this study was to develop a numerical model of the shoulder to ...

2007

Influence of the flattening of the glenohumeral joint on joint reaction force and humeral head translation during rotation in neutral abduction

Adrian Reist, Alexandre Terrier, Alain Farron

2006

Influence of glenohumeral conformity on glenoid stresses after total shoulder arthroplasty

Alexandre Terrier, Philippe Büchler, Alain Farron

2006

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