Methods To incubate the caries free permanent teeth with acid gelatinoid and/or collagenase, then to observe the ultrastructural change of root surface under scanning electron microscope .
方法将无龋恒牙分组经酸性液和
原酶分别或共同孵化处理后切割制
,脱水干燥,喷金,
描电镜观察根面超微结构
变化。