Effects of glenoid component version on humeral head displacement and joint reaction forces: An experimental study

Nyffeler, Richard W.; Sheikh, Ralph; Atkinson, Todd S.; Jacob, H. A. C.; Favre, Philippe; Gerber, Christian

doi:10.1016/j.jse.2005.09.016

Cited by 207 publications

(118 citation statements)

References 9 publications

Supporting

Mentioning

110

Contrasting

Unclassified

Order By: Relevance

“…In a biomechanical study, Nyffeler et al observed that with every degree of increasing retroversion, posterior subluxation increases by 0.5 mm, which leads to a posteriorly directed force vector. For every 4°change in the version, there was a 2°average force vector change away from the center of the glenoid [21]. This leads to an eccentric loading of the glenoid component and increased contact pressure at the posterior aspect of the glenoid, which has been described as the antero-posterior "rocking horse" phenomenon [9].…”

Section: Discussionmentioning

confidence: 99%

Outcomes after shoulder arthroplasty revision with glenoid reconstruction and bone grafting

Hoffelner

Moroder

Auffarth

et al. 2013

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Purpose Extensive glenoid bone loss after failed shoulder arthroplasty represents a challenge for revision arthroplasty. Treatment options vary widely and have been a source of controversy among experts. Methods Between 2004 and 2010, a total of 17 patients underwent glenoid reconstruction surgery using an autologous iliac crest bone graft and secondary revision arthroplasty due to extensive glenoid bone loss after failed previous total shoulder arthroplasty. The outcomes were assessed by means of clinical examination, Constant score, and bi-plane radiography as well as pre-, postoperative and follow-up CT. Results Before the revision surgery, the mean Constant score was 24±17 and improved to 40±13 after the glenoid rebuilding and revision arthroplasty. CT imaging revealed adequate glenoid bone stock restoration with no relevant graft resorption or loosening of the glenoid. The average postoperative antero-posterior diameter of the glenoid was 28±3 mm which had decreased to 25±3 mm at follow-up. The average postoperative version of the glenoid was 95.7°±6°and had decreased to 98.5°±4°at follow-up. Both the glenoid version and diameter had changed significantly (P <0.001) comparing postoperative and follow-up CT-scans. Conclusion Glenoid reconstruction surgery using an iliac crest bone-block autograft prior to revision arthroplasty represents a valuable salvage procedure in cases of extensive glenoid bone loss after primary shoulder arthroplasty. Sufficient glenoid bone stock restoration is indispensable for reliable fixation of glenoid components and in turn a satisfactory clinical outcome.

show abstract

Section: Discussionmentioning

confidence: 99%

Outcomes after shoulder arthroplasty revision with glenoid reconstruction and bone grafting

Hoffelner

Moroder

Auffarth

et al. 2013

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

show abstract

“…Eccentric loading can be due to migration of the humeral head (Franklin et al 1988) or disadvantageous implant positioning (Nyffeler et al 2006). In their ability to explore mechanical phenomena, FE simulations offer potential to understand these issues.…”

Section: (Iii) Shoulder Arthroplastymentioning

confidence: 99%

Numerical modelling of the shoulder for clinical applications

Favre

Snedeker

Gerber

2009

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

Research activity involving numerical models of the shoulder is dramatically increasing, driven by growing rates of injury and the need to better understand shoulder joint pathologies to develop therapeutic strategies. Based on the type of clinical question they can address, existing models can be broadly categorized into three groups: (i) rigid body models that can simulate kinematics, collisions between entities or wrapping of the muscles over the bones, and which have been used to investigate joint kinematics and ergonomics, and are often coupled with (ii) muscle force estimation techniques, consisting mainly of optimization methods and electromyography-driven models, to simulate muscular action and joint reaction forces to address issues in joint stability, muscular rehabilitation or muscle transfer, and (iii) deformable models that account for stress-strain distributions in the component structures to study articular degeneration, implant failure or muscle/tendon/bone integrity. The state of the art in numerical modelling of the shoulder is reviewed, and the advantages, limitations and potential clinical applications of these modelling approaches are critically discussed. This review concentrates primarily on muscle force estimation modelling, with emphasis on a novel muscle recruitment paradigm, compared with traditionally applied optimization methods. Finally, the necessary benchmarks for validating shoulder models, the emerging technologies that will enable further advances and the future challenges in the field are described.

show abstract

“…[1][2][3] When planning a total shoulder replacement (TSR), it is essential to address the morphology of any erosion of the glenoid in order to improve implant survival. [4][5][6][7][8][9] Optimal implant shape and positioning can be difficult to achieve, especially when bony support is lacking.…”

mentioning

confidence: 99%

Measurements of three-dimensional glenoid erosion when planning the prosthetic replacement of osteoarthritic shoulders

Terrier

Ston

Larrea

et al. 2014

The Bone & Joint Journal

View full text Add to dashboard Cite

The three-dimensional (3D) correction of glenoid erosion is critical to the long-term success of total shoulder replacement (TSR). In order to characterise the 3D morphology of eroded glenoid surfaces, we looked for a set of morphological parameters useful for TSR planning. We defined a scapular coordinates system based on non-eroded bony landmarks. The maximum glenoid version was measured and specified in 3D by its orientation angle. Medialisation was considered relative to the spino-glenoid notch. We analysed regular CT scans of 19 normal (N) and 86 osteoarthritic (OA) scapulae. When the maximum version of OA shoulders was higher than 10°, the orientation was not only posterior, but extended in postero-superior (35%), postero-inferior (6%) and anterior sectors (4%). The medialisation of the glenoid was higher in OA than normal shoulders. The orientation angle of maximum version appeared as a critical parameter to specify the glenoid shape in 3D. It will be very useful in planning the best position for the glenoid in TSR. Osteoarthritis (OA) of the gleno-humeral joint is often associated with an erosion of the glenoid.

show abstract

Effects of glenoid component version on humeral head displacement and joint reaction forces: An experimental study

Cited by 207 publications

References 9 publications

Outcomes after shoulder arthroplasty revision with glenoid reconstruction and bone grafting

Outcomes after shoulder arthroplasty revision with glenoid reconstruction and bone grafting

Numerical modelling of the shoulder for clinical applications

Measurements of three-dimensional glenoid erosion when planning the prosthetic replacement of osteoarthritic shoulders

Contact Info

Product

Resources

About