Hi, thanks for writing to HCM.
The very fact that two plates and nine pins are used to fix the fracture
indicates the complexity of the fracture pattern.
So, I suspect the cause of pain in the wrist after three years of internal fixation
could be due to the development of Secondary degenerative arthritis
in the wrist joint.
An xray of the wrist joint will diagnose the condition.
I suggest you to consult your treating surgeon for further management.
Hope this information is helpful. Good day