Periodontal disease Alen统计: 90%牙齿因龋病和牙周病拔除 龋病平均每人拔牙3.29个 牙周病平均每人拔牙10.35个 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 5 Allen统计: 90%牙齿因龋病和牙周病拔除 龋 病平均每人拔牙 3.29个 牙周病平均每人拔牙10.35个 Periodontal Disease