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  • RSU is advertising for shoulder fellowship to start in August-September 2019 and begining of 2020
    a post-CCT shoulder fellowship for Two years. please send CV to Prof. Levy's PA Charlotte Bourne and arrange a visit to meet Prof Levy and Mr Sforza. [Read more]
  • IDO Isometer Shoulder Muscle Strength Gauge.

    Available to buy online in - Innovative Design Orthopaedics - [Read more]
  • Groundbreaking research from the Reading Shoulder Unit by Prof. Ofer Levy and his team regarding Propionibacterium Acnes and shoulder arthritis. 
    Propionibacterium acnes: an underestimated etiology in the pathogenesis of osteoarthritis?

    This is a very important article in that it suggests the presence of propionibacterium in previously unoperated shoulders with arthritis and furthermore that 'aseptic' failures of shoulder arthroplasty may, in fact, be related to indolent infections with this slow growing organism.
    Read comments by Dr Frederick A. Matsen III, M.D.
    [Read more]
  • Listen to the BBC Radio4 programme - a day in the operating theatre at the Reading Shoulder Unit at the Royal Berkshire Hospital - Case Notes with Dr Mark Porter on Regional anaesthesia for shoulder surgery [Read more]
  • Art at the Reading Shoulder and Elbow Centre
    Original fine art prints all dealing with human body in different situations by four artists are exhibited in the Reading Shoulder and Elbow centre 

    The prints on display are available to buy, with the artist contributing a donation to research. For more information please contact the secretaries in the unit.

    [Read more]
  • The Verso stemless rTSA is approved in Australia & New Zealand by the TGA.
    and it was launched and in increase use in Australia. 

  • Due to the current state of lockdown due the Coronavirus outbreak, We offer Virtual Video consultations for post-operative patients and follow-up and offer Virtual Video consultations for advice for new patients.

    If interested please call:
    Prof. Ofer Levy - Secretary - Cherie 07800875033
    Mr. Giuseppe Sforza - Secretary - Tania 07488384479
    NHS - Secretary - Gail 0118 902 8109
      [Read more]
  • Further scientific support from Robert Hudek et al. paper to Prof. Levy’s theory on the role of C Acnes in the aetiology of Osteoarthritis (Read More)
Primary stability in reversed-anatomy glenoid components

Abstract: Reversed-anatomy shoulder replacement is advocated for patients with poor rotator

cuff condition, for whom an anatomical reconstruction would provide little or no stability.

Modern generations of this concept appear to be performing well in the short-term to midterm

clinical follow-up. These designs are almost always non-cemented, requiring a high degree of

primary stability to encourage bone on-growth and so to establish long-term fixation. Six

different inverse-anatomy glenoid implants, currently on the market and encompassing a

broad range of geometrical differences, were compared on the basis of their ability to impart

primary stability through the minimization of interface micromotions. Fixing screws were only

included in the supero-inferior direction in appropriate implants and were always inclined at

the steepest available angle possible during surgery (up to a maximum of 30u). The extent of

predicted bony on-growth was, of course, highly dependent on the threshold for interface

micromotion. In some instances an additional 30 per cent of the interface was predicted to

promote bone on-growth when the threshold was raised from 20 mm to 50mm. With maximum

thresholds of micromotion for bone on-growth set to 30 mm, the Zimmer Anatomical device

was found to be the most stable of the series of the six designs tested herein, achieving an

additional 3 per cent (by surface area) of bone on-growth above the closest peer product

(Biomet Verso). When this threshold was raised to 50 mm, the Biomet Verso design was most

stable (3 per cent above the second-most stable design, the Zimmer Anatomical). Peak

micromotions were not a good indicator of the predicted area of bone on-growth and could

lead to some misinterpretation of the implant’s overall performance. All but one of the

implants tested herein provided primary stability sufficient to resist motions in excess of

150 mm at the interface.

Keywords: primary stability, reversed anatomy, shoulder replacement, glenoid components

(Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 2009 223: 805 DOI: 10.1243/09544119JEIM557)