Priority 21 from the Revision Knee Replacement PSP

UNCERTAINTY: What are the best ways to investigate implant-related failure in a knee replacement?  (JLA PSP Priority 21)
Overall ranking 21
JLA question ID 0093/21
Explanatory note What are best way to assess problematic knee replacements where there is a problem with the implant? This includes issues with loosening or when the implant positioning could be improved and may include research exploring imagin modalities in this context.  

None identified 

Health Research Classification System category Musculoskeletal
Extra information provided by this PSP
Original uncertainty examples What are the mechanics of a problematic total knee that associates it with decreased mobility? ~ How do you assess on X-ray whether the implant size if correct? ~ Why is there a discrepancy between radiological findings and symptoms
Submitted by  See data spreadsheet on JLA website
PSP information
PSP unique ID 0093
PSP name Revision Knee Replacement
Total number of uncertainties identified by this PSP. 32  (To see a full list of all uncertainties identified, please see the detailed spreadsheet held on the JLA website)
Date of priority setting workshop 21 May 2019