Arthroscopic Ankle Fusion using OrthoSolutions CSS screws surgical technique
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An arthroscopic ankle fusion probably has consistently the highest union rate of any ankle fusion technique. It is often associated with low levels of short-lived post-operative pain and if bone quality is good there is the possibility of early limited weight-bearing in compliant patients. Union rates in excess of 90% are normal and much of the post operative period can be spent in a post-operative boot rather than cast given the inherent stability of the maintained (as opposed to flat cut) articular surfaces.
The technique is particularly useful for cases with poor soft tissue quality such as areas covered with skin graft or various plastic surgical flaps or compromised wound healing capacity such as diabetics.
There is disagreement about its use in the presence of significant deformity though as long as the deformity is passively correctible there is little issue. Even a degree of fixed deformity of the arthritic ankle can be corrected by differential intra-articular resection/preparation of the joint surfaces.
In the presence of a mobile compensatory mid-foot and hind-foot a normal, or largely normal, gait pattern can be expected following arthroscopic ankle fusion. Appropriate patient selection is important and in-particular considering fusion carefully in those with pre-exisiting sub-talar or midfoot arthrosis which will deteriorate in many cases. These are the same considerations though for any ankle fusion irrespective of technique.
One should be fully conversant with the technique of ankle arthroscopy before attempting an arthroscopic ankle fusion. This technique is covered on OrthOracle at https://www.orthoracle.com/library/ankle-arthroscopy-smith-nephew-guhl-non-invasive-ankle-distractor/
Alternative techniques to fuse the ankle should always be in a surgeons skill set and examples can be read on OrthOracle at https://www.orthoracle.com/library/open-ankle-arthrodesis-using-ankle-fix-4-0-plate-zimmer-biomet/ and https://www.orthoracle.com/library/open-ankle-fusion/
Author: Mark Herron FRCS.
Institution: The Wellington Hospital, London, UK.
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