Objective
To obtain a effect of intraarticular injection of Sodium Hyaluronate in the patient with degenerative osteoarthritis without restriction of activities of daily living.

Method
Twenty-five patients were participated in this study. These patients are diagnosed as degenerative osteoarthritis by clinical symtoms and radiographic findings. Sodium hyaluronate, 2.5 ml, 3 mg/ampule, were injected intraarticulary without local anesthesia once a week for 5 times consecutively. For evaluation of the effectiveness of sodium hyaluronate, we assess the parameters for subjective and objective symtoms scored from 0 to 3 on 3 items, and for activities of daily living scored from 0 to 4 on 4 items. And then, we compared these data between pre-injection and at post-injection 2, 4, and 5 weeks. Changes of subjective and objective symtoms, and activities of daily living are assessed using Kellgren's X-ray grading of degenerative osteoarthritis. Improvement of the subjective pain is recorded by visual analogue scale.

Results
1. Subjective and objective symtoms, and activities of daily living with time progression were significantly increased at post-injection 4, 5 weeks compared with pre-injection status (P＜0.05). 2. Subjective and objective symtoms, and activities of daily living according to Kellgren's X-ray classification were significantly increased at stage II and III (P＜0.05). 3. Visual analogue scale is significantly decreased after injection (P＜0.05).

Conclusion
Intraarticular injection of sodium hyaluronate showed improvement of patient's subjective and objective symtoms, and activities of daily living. The improvement was pronounced in the cases of high grade of degenerative osteoarthritis (stage II, III) according to Kellgren's X-ray classification as well as low grade (Stage I).