I am one year out from a total knee replacement and stil have clicking and stiffness in the joint. At times I do have pain in the bone as well. The knee does not feel stable and sometimes it feels as though it is going to give out.
Well, without a detailed clinical evaluation it would be difficult to determine the cause of the symptoms. Possibilities that may need to be considered include prosthesis issues, further degeneration, bursitis, tendonitis, neuro-muscular causes etc. Ideally a period of physiotherapy is advised post a TKR to help improve movement and muscle strength and most patents are symptom free and have good range of movement by 2-8 months. Since it has already been an year since the replacement, I would suggest considering a review with your treating orthopedician to look for secondary issues and suggestion of an appropriate management plan.
Hope this is helpful.
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