Reverse shoulder prothesis

INTRODUCTION: This study aimed to assess cost-effectiveness of shoulder arthroplasty for osteoarthritis (OA) and rotator cuff tear arthropathy (CTA) from the perspective of a publicly funded health care system using patient data, health utilities and costs from a real-world situation. HYPOTHESIS: Our hypothesis was that arthroplasty for OA is more cost-effective than for CTA. MATERIAL AND METHODS: We gathered a cohort of patients with 153 anatomic total shoulder arthroplasty (TSA) for OA and 107 reverse shoulder arthroplasty (RSA) for CTA between years 2016 - 2020 at a university hospital...

To avoid dislocation of the shoulder joint after reverse total shoulder arthroplasty, it is important to achieve sufficient shoulder stability when placing the implant components during surgery. One parameter for assessing shoulder stability can be shoulder stiffness. The aim of this research was to develop a temporary reverse shoulder implant prototype that would allow intraoperative measurement of shoulder stiffness while varying the position of the implant components. Joint angle and torque measurement techniques were developed to determine shoulder stiffness...

INTRODUCTION: Shoulder arthroplasty is increasingly frequent, and the associated literature is abundant. Citation rate is often considered a good means of assessing impact and scientific value. However, analysis of methodological quality is also essential in evidence-based medicine. OBJECTIVES: 1) To identify the 50 most cited articles on shoulder arthroplasty, and 2) to assess the correlation between citation rate and methodological quality. The study hypothesis was that there is no correlation between citation rate and methodological quality...

This work presents a polymer-based tactile capacitive sensor capable of measuring joint reaction forces of reverse total shoulder arthroplasty (RTSA). The capacitive sensor contains a polydimethylsiloxane (PDMS) dielectric layer with an array of electrodes. The sensor was designed in such a way that four components of glenohumeral contact forces can be quantified to help ensure proper soft tissue tensioning during the procedure. Fabricated using soft lithography, the sensor has a loading time of approximately 400 ms when a 14...

Reverse shoulder arthroplasty (RSA) is a commonly performed salvage procedure for failed proximal humeral fracture fixation. The rate of intraoperative periprosthetic fractures is higher compared to primary RSA. The goal of this study was to investigate the biomechanical value of a protective cerclage during stem impaction in a revision surgery setting. Twenty-eight fresh-frozen human humeri were used to assess different configurations for steel wire and FiberTape cerclages. A custom-built biomechanical test setup simulated the mallet strikes during the stem impaction process with the Univers Revers prothesis stem...

BACKGROUND: Randomized controlled trials (RCT) are regarded as the gold standard for effect evaluation in clinical interventions. However, RCTs may not produce relevant results to all patient groups. We aimed to assess the external validity of a multicenter RCT (DelPhi trial). METHODS: The DelPhi RCT investigated whether elderly patients with displaced proximal humeral fractures (PHFs) receiving reversed total shoulder prosthetic replacement (RTSA) gained better functional outcomes compared to open reduction and internal fixation (ORIF) using an proximal humerus locking plate (PHILOS)...

INTRODUCTION: Reverse shoulder arthroplasty (RSA) has become a common treatment in displaced proximal humeral fracture (PHF) in elderly patients due to inconstant results with osteosynthesis or hemiarthroplasty. RSA allows a good anterior elevation but rotational results are more random and depend on tuberosity healing. HYPOTHESIS: Use of an offset modular system (OMS) on the prothesis improve tuberosity healing and functional results. MATERIAL AND METHODS: This retrospective cohort analysed radiological and clinical outcomes at least one year after the use of RSA Humelock II Reversed (Fx Solutions) after a displaced PHF Neer 3 or 4 in patients over 70 years...

PURPOSE: Although shoulder arthroplasty is relatively safe in general population, it remains unclear in transplant recipient. Aim of this study was to determine outcomes and morbidity after shoulder arthroplasty in lung transplant recipients. METHODS: A retrospective analysis was performed at our university hospital center from 2001 to 2015. Main inclusion criterion was all lung transplant recipient who underwent shoulder arthroplasty. Clinical outcomes including Constant score, visual analogue scale (VAS), American Shoulder and Elbow Surgeons score (ASES) were determined in pre-operative period and a minimum follow-up of 36 months...

OBJECTIVE: To investigate clinical results of reverse total shoulder arthroplasty in treating comminuted fracture of proximal humerus in elderly patients with rotator cuff injury. METHODS: From January 2017 to December 12, 12 comminuted fracture or dislocation of proximal humerus elderly patients were diagnosed as rotator cuff injury by preoperative MRI and operative exploration, and treated by reverse total shoulder arthroplasty. Among them, including 7 males and 5 females aged from 65 to 86 years old; 5 patients injured on the left side and 7 patients injured on the right side...

INTRODUCTION: Historically, patients with rotator cuff arthropathy had limited reconstructive options. The early generations of reverse total shoulder arthroplasty (rTSA) designs had increased failure rates due to loosening of glenoid baseplates secondary to excessive torques. In 1985, Paul Grammont introduced a prosthetic design changing the center of rotation that addressed this major complication. The Grammont principles remain the foundation of modern reverse total shoulder prostheses, although the original design has undergone several adaptations...

Evolution of shoulder arthroplasty has led to mainly three types of implants: hemiarthroplasty, total shoulder arthroplasty and reverse shoulder arthroplasty. There is yet no clear consensus about indications for the different existing types of prothesis. The aim of this article is therefore to bring together and clarify the indications found in the current literature. Hemiarthroplasty, historically the first widely used implant, has lost much ground to total shoulder arthroplasty, and keeps its place only for specific situations...

The semiconstrained design of the reverse arthroplasty allows loads from the humerus to challenge the fixation of the glenoid component to the scapula. We examined some of the factors affecting the quality of glenoid screw fixation, including the density of the material into which the screws are placed, the purchase of individual screws, and the direction of loading in relation to screw placement. Loads were applied by the humeral component to glenoid components with different conditions of fixation. The load to failure for each set of conditions was measured and compared statistically...