Hi,
thank you for providing the brief history of you.
A thorough neurmuscular assessment is advised.
As there is
numbness over the top of foot and ankle as well, a thorough assessment by a orthopedic will help understand the issue better. If the ortho feels there is a need of the MRI of the
lumbar spine, you will be guided one.
Also, as you had TKR may be on both sides, as mentioned by you, before the TKR the gait pattern was different in your case due to pain and post TKR it changed further, which may have lead to the
soft tissue injury in the spinal column.
After a thorough assessment, you may be advised to undergo
physical therapy, as they will help to improve the strength in the core muscles,
pelvic floor muscles, spinal muscles and the lower limb as a whole. I am sure you will have 99% recovery at the earliest.
Regards
Jay Indravadan Patel