Chronic Gingivitis [CLINICAL FEATURES] 炎症水肿型圆 Department of Oral Pathology, Shandong University http://course.sdu.edu.cn/oralhistopath.htmlDepartment of Oral Pathology, Shandong University http://course.sdu.edu.cn/oralhistopath.html 11 [CLINICAL FEATURES] 炎症水肿型 Chronic Gingivitis