Ankle replacement-Wright Infinity ankle replacement surgical technique
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Learn the Ankle replacement-Wright Infinity ankle replacement surgical technique with step by step instructions on OrthOracle. Our e-learning platform contains high resolution images and a certified CME of the Ankle replacement-Wright Infinity ankle replacement surgical procedure.
Total Ankle replacements have been implanted for the treatment of arthritic conditions of the ankle for a few decades now. The design and biomechanics of these early implants was at best rudimentary and were manufactured on the premise that the ankle is a monoaxial joint capable of movement only in the sagittal plane. It did not allow for translational or rotational movements of the ankle that is now known to occur in human ankles. These were simple two component assemblies that articulated against each other and failed either due to lack of osseointegration or excessive wear
Subsequent generations of implants used more modern ideology to create metal components for the tibia and talus with intervening ultra high molecular weight polyethylene acting either as a spacer when fixed or as a meniscus engaging in mobile bearing functions. These proved to be much more successful both in terms of function and of survivorship. The Wright Infinity ankle replacement is one of the latest evolutions of ankle replacement.
The use of the Prophecy cutting jigs are a unique feature of the Wright Infinity Ankle Replacement. This requires a CT scan of the lower limb in question (using a specific protocol ) to enable 3D technology to create these unique jigs. The software uses specific anatomic high points on the tibia and talus including prominences osteophytes and peaks and troughs to create a Wright Infinity jig that will sit on the respective bones fitting into these high points (the so called ‘sweet spot’ where the jig fits perfectly without a toggle). The software also creates an accurate model of the distal tibia and the talus which are sterilisable so that the jig can be fitted onto these anatomically perfect models to assess and practice the orientation of these jigs when fitted on to the actual patients ankle bones on table. Thus at least two copies of these bone models are available sterilised to use for practice on table
Author: Kartik Hariharan FRCS
Institution: Aneuran Bevan University Health Board ,Wales ,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.
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- 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
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