Chronic Gingivitis [Etiology] 局部刺激因素会促进和加重龈炎的发生和发展。 o软垢( soft mucinous deposits) o牙石( calculus) 食物嵌塞( food impaction) o不良修复体( Faulty or irritating restorations or appliances) o剔牙习惯 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 9 [Etiology]  局部刺激因素会促进和加重龈炎的发生和发展。 软垢(soft mucinous deposits) 牙石(calculus) 食物嵌塞(food impaction) 不良修复体(Faulty or irritating restorations or appliances) 剔牙习惯 Chronic Gingivitis