Institute of Dentistry, University of Turku, Turku, Finland.
Laboratory of Molecular Science and Engineering, Åbo Akademi University, Turku, Finland.
Acta Odontol Scand. 2023 Aug;81(6):491-498. doi: 10.1080/00016357.2023.2199848. Epub 2023 May 16.
Kombuchas and other tea-based beverages are often perceived as healthy products despite the lack of knowledge on their effects on oral health. This study determined the erosive potential of commercial kombuchas, and ice teas compared to cola drinks.
The pH and fluoride content of 7 kombuchas and 18 tea drinks were measured with ion-selective electrodes. Calcium dissolution from hydroxyapatite grains was quantified by atomic absorption spectroscopy after beverage exposure. The effect of beverages on the enamel surface was visualized by scanning electron microscopy (SEM). Distilled water, and cola drinks were used as negative and positive controls.
The kombuchas exhibited lower pH values (2.82-3.66) than the ice teas (2.94-4.86), but still higher than the cola drinks (2.48-2.54). The fluoride concentration varied between 0.05 and 0.46 ppm and for 7 beverages the concentration was below the detection limit. The calcium release for kombuchas was 198-746 mg/l, for ice teas 16.1-507 mg/l, and for cola drinks 57.7-71.9 mg/l. Twenty-two beverages had a significantly greater calcium release than the cola drinks ( = .009-.014). The surface etching of the enamel was seen in the SEM analysis after beverage exposure.
Tea-based beverages have even higher erosive potential than cola drinks. Kombuchas especially, displayed a considerable erosive potential.
尽管人们对康普茶和其他茶基饮料对口腔健康的影响知之甚少，但它们通常被认为是健康产品。本研究旨在确定商业康普茶和冰茶与可乐饮料相比的腐蚀性。
采用离子选择性电极法测定 7 种康普茶和 18 种茶饮料的 pH 值和氟含量。通过原子吸收光谱法测定羟基磷灰石颗粒中钙的溶解量，然后用扫描电子显微镜（SEM）观察饮料对牙釉质表面的影响。蒸馏水和可乐饮料分别作为阴性和阳性对照。
康普茶的 pH 值（2.82-3.66）低于冰茶（2.94-4.86），但仍高于可乐饮料（2.48-2.54）。氟浓度在 0.05 至 0.46 ppm 之间，7 种饮料的浓度低于检测限。康普茶的钙释放量为 198-746 mg/L，冰茶为 16.1-507 mg/L，可乐饮料为 57.7-71.9 mg/L。22 种饮料的钙释放量明显大于可乐饮料（=0.009-0.014）。在饮料暴露后的 SEM 分析中观察到牙釉质表面的蚀刻。
茶基饮料的腐蚀性甚至高于可乐饮料。特别是康普茶，具有相当大的腐蚀性。
