美国加利福尼大学牙科学院的一位口腔生物学副教授罗伦斯·伍林斯基,在研究尼日利亚人的咀嚼糖(是当地的一些植物加工而成)时,发现它可能是导致尼日利亚龋齿发病率低的原因。由于“咀嚼糖”中含有单宁能够阻止细菌附着到牙齿的珐琅质上,因而可预防龋牙。他们在实验中对这一猜想进行了验证,把“咀嚼糖”提取物加入到引起龋牙的菌系中,然后把这种菌 Lawrence Wollinski, an associate professor of oral biology at the University of California, School of Dentistry, who studied Nigerian chewing sugar, which is processed from some native plants, found it could be the cause of Nigeria’s tooth decay Low incidence of the reasons. Because chewing sugar contains tannin to prevent bacteria from attaching to the enamel of the tooth, caries can be prevented. They experimentally validated this conjecture by adding the “chewing sugar” extract to the cariogenic strains of the caries,