The popular wisdom of the apple instead of a cleaning of the teeth contains some truth. Because it is true that fruits contain, in addition to vitamin C, many mineral substances. And indeed, chew an apple after meals eliminates plaque.
Other crunchy fruits and vegetables, such as celery or carrots when chewed, work like small toothbrushes. Pieces of fruit or vegetables have an abrasive effect and help eliminate plaque and slight discoloration of the teeth. The cleaning effect can be seen with the naked eye, even if it is weak.
Acid in fruit attacks tooth enamel
But neither an apple nor a carrot will be able to remove leftover food and bacteria from critical areas such as the gingival crevice. Fruits and vegetables are only suitable as a troubleshooting solution, the emergency cleaning team, so to speak. They do not replace, of course, regular cleaning of the teeth.
And even apples contain acids that alter saliva and also attack tooth enamel. The fructose contained in the apple is a favorable substrate for cariogenic bacteria; the acids produced alter the dental surfaces.
If sugar and acids remain on the teeth, the positive effect on the consumption of an apple is lost. We must then wait 30 to 60 minutes, if we want to use the abrasive effect and cleaning of an apple, before using a toothbrush and toothpaste.