The goal of this clinical trial is to learn if vitamin D supplementation affects postoperative rehabilitation in osteoarthritis patients who underwent joint arthroplasty. The main questions it aims to answer are: Does oral vitamin D supplementation for a period of time after joint arthroplasty affect the postoperative recovery speed in patients who have vitamin D deficiency? Does oral vitamin D supplementation after joint arthroplasty affect the long-term recovery of joint functions in patients who have vitamin D deficiency? Participants will: Take vitamin D oral supplement every day for 3 months. Visit the clinic in 1, 3, 6, 12 months after joint replacement surgery for checkups and tests.
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Knee joint function
Timeframe: From enrollment to the end of treatment at 1 year
Hip joint function
Timeframe: From enrollment to the end of treatment at 1 year
Muscle strength
Timeframe: From enrollment to the end of treatment at 1 year