Yamamoto M, Miyazaki Y, Miura K, Nagasaka N
Department of Pedodontics, Hiroshima University, School of Dentistry.
Shoni Shikagaku Zasshi. 1991;29(1):86-94.
The purpose of this study was to evaluate the erosive properties of sport drinks and to clarify the facts which effect these properties. We analysed the contents of 3 kinds of sport drinks and measured their capacity to dissolve hydroxyapatite in vitro under several duration times. The following results were obtained: 1) The pH Values of the sport drinks ranged from 2.91 to 4.07. 2) The total sugar concentration of the sport drinks ranged from 3.24 to 5.95%. The sugar were consisted mainly to sucrose, glucose and fructose, but their proportion in the sport drinks had different values respectively. 3) After stirring for 1 and 5 minutes, there was a negative correlation (Spearmann's rank correlation coefficient test) between the pH values of the sport drinks and the amounts of Ca2+ released into them. And after stirring for 10 and 20 minutes, there was a negative correlation between the Ca concentrations of the sport drinks and the amounts of Ca2+ released into them. 4) The addition of sugar to the sport drinks showed no effect on their capacity to dissolve hydroxyapatite. The results suggested that tooth erosion depends on the pH value of the sport drink at the early stage when the tooth contacted it, and also tooth erosion depends on the Ca concentration of the sport drink when the tooth is in contact with it for a long time.
本研究的目的是评估运动饮料的侵蚀性，并阐明影响这些特性的因素。我们分析了3种运动饮料的成分，并在几个不同时长下测量了它们在体外溶解羟基磷灰石的能力。得到以下结果：1）运动饮料的pH值范围为2.91至4.07。2）运动饮料的总糖浓度范围为3.24至5.95%。糖主要由蔗糖、葡萄糖和果糖组成，但它们在运动饮料中的比例分别不同。3）搅拌1分钟和5分钟后，运动饮料的pH值与释放到其中的Ca2+量之间存在负相关（斯皮尔曼等级相关系数检验）。搅拌10分钟和20分钟后，运动饮料的Ca浓度与释放到其中的Ca2+量之间存在负相关。4）向运动饮料中添加糖对其溶解羟基磷灰石的能力没有影响。结果表明，牙齿侵蚀在牙齿接触运动饮料的早期阶段取决于运动饮料的pH值，并且当牙齿长时间接触运动饮料时，牙齿侵蚀也取决于运动饮料的Ca浓度。
