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用100g牙膏内含0.115g Vit A的F牙膏进行评价。用含相同成分,但不含Vit A的G牙膏作对照。抽笺选择年龄15～58岁的228人,其中113人、63人、52人分别为轻、中、重型牙周炎。在开始观察前所有患者都去除牙石,分为两组,分别为113人和115人。根据性别、年龄和牙周炎严重程度进行对照。每位患者从医生处领取牙膏,每天用以刷牙,使用1个月。
Evaluation was performed with 100 g toothpaste containing 0.115 g Vit A F toothpaste. G with the same composition, but without Vit A G toothpaste as a control. Surveillance selected 228 patients aged 15 to 58 years, of which 113 people, 63 people, 52 were light, medium and heavy periodontitis. Before starting the observation, all patients had their calculus removed, divided into two groups of 113 and 115, respectively. Controls are based on gender, age and periodontitis severity. Each patient receives toothpaste from the doctor and brushs his teeth daily for 1 month.