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本研究目的是测定致龋性和非致龋性牙菌斑对牙釉质溶解速度的影响。作者研究了40名11岁～15岁学生,他们无并发症,在条件相同的学校住宿.用亚甲红作致龋牙菌斑显示剂。在上中切牙唇面放置含1%葡萄糖溶液棉球2分钟,然后贴敷0.1%亚甲红染料1分钟。染料颜色由黄变红为阳性反应,证明由于酸及其他致龋物质的形成使菌斑pH 值下降而致龋.染料颜色无变化为阴性。将所研究的牙齿去除牙菌斑后干燥唇面,用活体组织检查法测定牙釉质溶解速度.
The purpose of this study was to determine the effect of cariogenic and non-cariogenic plaque on the rate of tooth enamel dissolution. The authors studied 40 students aged 11 to 15 years with no complications and accommodation in the same school conditions using methylene red as a cariogenic plaque indicator. Place a cotton ball containing a 1% glucose solution on the face of the upper incisors for 2 minutes, then apply a 0.1% methylene red dye for 1 minute. The color of the dye changed from yellowish red to positive, demonstrating that the color of the plaque was decayed due to the formation of acids and other cariogenic substances, and no change in the color of the dye was negative. The dentifrice was removed from the tooth under study to dry the labial surface and the rate of enamel dissolution was determined by biopsy.