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材料和方法 进行口腔卫生训练174例,分两组,第1组108例,年龄18～19岁,第2组66例,年龄20～24岁,男女例数相等。检查牙垢指数(按Greene-Ver-million)以确定口腔卫生状况。检查游离龈炎和附着龈炎指效(PMA)以确定慢性龈炎程度。首先训练正规刷牙方法两个月,进行监督,每天刷牙2次。正规刷牙后再检查牙垢指数。随后由专业人员对牙垢进行清除:把细裂钻按在弯机头上,棉花缠绕在裂钻上使形成圆锥体,用磷酸粘固粉粉末作磨料,用磨牙电机清除牙垢,因为孵料含有氧化锌、氧化钙、铝和硅等细小的弥散粉
MATERIALS AND METHODS Oral hygiene training was performed in 174 patients, divided into two groups. Group 1 consisted of 108 patients, aged 18-19 years, group 2, 66 patients, aged 20-24 years with equal number of men and women. Check tartar index (by Greene-Ver-million) to determine oral hygiene. Free gingivitis and gingivitis index (PMA) were examined to determine the degree of chronic gingivitis. First regular brushing method training for two months, to monitor, brush your teeth 2 times a day. Regular tooth examination and then check the tartar index. Tartar clearances were then performed by a specialist: Pressing a fine split drill on the head of the bender, the cotton wrapped around the split drill to form a cone, using phosphate cement powder as the abrasive and a molars motor to remove the tartar as the hatchery contained Zinc oxide, calcium oxide, aluminum and silicon and other small dispersed powder