Nordbo H
Acta Odontol Scand. 1977;35(6):305-10. doi: 10.3109/00016357709064129.
The ability of tannic acid to discolor pellicle was studied in vitro and in vivo. Freshly extracted teeth were submerget in solutions of tannic acid, and in the clinical study individuals rinsed three times daily with 0.1% or 0.2% tannic acid. It was fount that 0.2% tannic acid caused brownish discolorations within 10-12 days both in vitro and in vivo. Discolored pellicle material collected from the in vivo test group was shown to contain furaldehyde after hydrolysis. The origin of the furaldehyde is not ascertained, but could be due to the presence of dietary deposits, transformation of pellicle pentoses, or from reactions between reducing sugars and amino compounds.
在体外和体内研究了鞣酸使菌斑变色的能力。将新鲜拔除的牙齿浸泡在鞣酸溶液中，在临床研究中，受试者每天用0.1%或0.2%的鞣酸漱口三次。结果发现，0.2%的鞣酸在体外和体内均可在10-12天内导致牙齿出现褐色变色。从体内试验组收集的变色菌斑材料经水解后显示含有糠醛。糠醛的来源尚未确定，但可能是由于饮食沉积物的存在、菌斑戊糖的转化，或还原糖与氨基化合物之间的反应。
