Lima stemmed SMR reverse geometry shoulder replacement (nickel free implants)
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Learn the Lima stemmed SMR reverse geometry shoulder replacement (nickel free implants) surgical technique with step by step instructions on OrthOracle. Our e-learning platform contains high resolution images and a certified CME of the Lima stemmed SMR reverse geometry shoulder replacement (nickel free implants) surgical procedure.
Reverse geometry configuration total shoulder replacements are in widespread use for the treatment of patients with rotator cuff deficient shoulders associated with significant arthritic change, known as cuff tear arthropathy. Such implants have also been used in the management of patients with irreparable proximal humeral fractures, a technique which has been described elsewhere in Orthoracle.
The design rationale in placing a prosthetic ball on the glenoid (the glenosphere) and a socket on the humeral side in a semi-constrained construct, is to medialise the joints centre of rotation and so increase the moment arm of the large deltoid muscle. This potentially optimises its function in the absence of the deficient rotator cuff tendons.
Many companies have developed such shoulder replacement implant systems. In this case, I am using the stemmed reverse geometry system, known as SMR from the Italian company Lima. The patient in this case is a female in her 70s, who presented with pain and disfunction in her non dominant left shoulder. Clinical assessment and investigations revealed a rotator cuff tear arthropathy. She had exhausted conservative measures and felt that her shoulder was bad enough to consider major arthroplasty surgery. During her history, she revealed that she had a significant allergy to nickel. Whilst there is little evidence that patients with nickel allergies or sensitivities have significant reaction to orthopaedic implants containing nickel, this is a risk to which the patient does not need to be exposed.
In the standard Lima shoulder replacement implants, the cobalt chrome components do contain nickel, although this is less than 1%. The Lima system does have options to avoid using any nickel and the implants used in this case are titanium, with a polyethylene humeral insert.
Author : Mark Crowther FRCS (Tr & Orth).
Institution: The Avon Orthopaedic centre, Bristol, UK.
- Each operation and the questions associated become a named course in the CPD section
- The operative technique itself is read as a lesson as is any company implant information if this is being assessed.
- You’ll need to tick the box to confirm this has been done and can do this immediately if you have already read the op tech.
- The vast majority of operations have a 10-15 MCQ quiz covering all aspects of the decision making and the technique
- There are four possible answers of which one is correct (or on occasion more correct) than the others.
- There are additional quiz modules on the surgical steps, the implants and problem cases being added continually
- The course is completed once all the lessons are read and quizzes submitted and passed.
- On successful completion of each quiz you will receive validated CPD points that add to the certificate in your CPD folder.
- Your dashboard also will contain a record of the time you have spent logged onto and using the site.
- The timer suspends after 5 minutes though if there is no activity.
- When you restart you will resume at the same point in the module.
- Once you have completed each quiz you will need to feedback on the module first then click “submit” and your paper will be marked.
The pass mark is 75%.
- If you fall below this level you will be directed back to re-read the slides where you’ve tripped up.
- Once these have been read you can re-do just the questions you failed on.
- Once you have passed the quiz you can return at a future stage & resit .
- Operation Quiz – 1 CPD point
- Surgical steps Quiz – 1/4 CPD point
- Implants Quiz – 1/4 CPD point
- Problem case Quiz – 1/2 CPD point
One CPD point equates to one hour of academic activity
Welcome to the Professional Development question section. The objective of taking these tests is to demonstrate that you have understood all aspects of the assessment and management of patients requiring surgical intevention. On successful completion you will receive a certificate accredited by both the Royal College of Surgeons of both England and Edinburgh as well as the British Orthopaedic Association.
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