Gingival crevicular fluid was collected from labial and lingual mesial and distal sites by filter paper strips before tooth preparation.

• 结果钴铬合金烤瓷冠修复后,患牙的菌斑指数无明显改变,但探诊深度,龈沟出血指数、天冬氨酸转氨酶及碱性磷酸酶水平均比修复前明显升高。