目的：揭示类风湿性关节炎患者关节炎严重程度与牙周骨丧失程度的相关性。
Objective:To study the correlation between the degree of rheumatoid arthritis(RA) and periodontal bone loss.
方法建立大鼠根尖周炎动物模型，于术后1、2、3、4周取下颌骨组织，摄X线牙片、制作石蜡切片；
The SD rats were killed at 1, 2, 3, 4 weeks and mandibular molar teeth X-ray were taken.
方法建立大鼠根尖周炎动物模型，于术后1、2、3、4周取下颌骨组织，摄X线牙片、制作石蜡切片；
The SD rats were killed at 1, 2, 3, 4 weeks and mandibular molar teeth X-ray were taken.
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