牙周病
http://www.a-hospital.com/w/%E7%89%99%E5%91%A8%E7%97%85
http://www.qiuyi.cn/department/337/index.html?from=sogoupc
http://baike.sogou.com/v98792.htm
http://health.sina.com.cn/disease/ku/00282/
牙周病圖片
http://image.baidu.com/search/index?tn=baiduimage&ps=1&ct=201326592&lm=-1&cl=2&nc=1&ie=utf-8&word=%20%E7%89%99%E5%91%A8%E7%97%85
http://pic.sogou.com/pics?query=%D1%C0%D6%DC%B2%A1&p=40230500&st=255&mode=255
