The ultimate goal for any treatment plan of an arthritic condition is to reduce pain, prevent further damage or inflammation and improve the function of the affected joint/s. Careful exercise and appropriate movements can be highly effective in helping arthritis sufferers cope with their condition.
Despite a joint being affected by arthritis it is still perfectly capable to perform as is physically required as long as it is given the right care and conditioning. The previous history of the affected joint, such as any injuries and given treatment, will play a significant role in future rehabilitation planning. For a more detailed look at symptomatic assessment and treatment options see recent article - Coping With Arthritis And Our Treatment Approach
It is also quite possible that you may have to adjust certain physical habits you may have with regards how you perform everyday tasks.