Hello @kaencar, your question caught my eye as one who also suffers from forms of arthritis and a bad right knee that I had cartilage removed from when I was in my 30s. The older I get the more it bothers me so I've often thought about knee replacement. I was able to find some interesting work on new types of treatment being done by Mayo Clinic.

Innovations in knee care: Women and knee arthritis; controlling pain; partial replacement:
-- https://www.mayoclinic.org/medical-professionals/clinical-updates/orthopedic-surgery/innovations-knee-care-women-knee-arthritis-controlling-pain-partial-replacement

Also from the Cleveland Clinic -- What's New in Arthritis Treatment:
-- https://my.clevelandclinic.org/health/transcripts/1370_what-s-new-in-arthritis-treatment

Hope this helps.

John