预防牙石牙膏的研制和临床试用＊郭吉力王立珍邹霄杨丽华牙石是引起牙周疾病的主要局部因素，牙石在我国人群中广泛存在，而目前清洁口腔牙石主要靠机械去除，清除牙石将花费大量劳力和费用，我国人口众多，难以做到人人定期到专科医生处洁牙，因而化学途径去除和抑制牙石... Prevention of dental calculus toothpaste research and clinical trial * Guo Jili Wang Lizhen Zou Xiao Yang Lihua Tooth stone is the main local cause of periodontal disease, dental calluses are widespread in our population, and currently clean dental calculus mainly by mechanical removal, removal of calculus will spend a lot of labor And the cost of our country's large population, it is difficult to achieve regular cleaning of teeth to the specialist, and thus chemical means to remove and inhibit tartar ...