Here is a slightly different way that has worked for me. Swish about a tablespoon or more of cold pressed Sesame oil in your mouth forcing back and forth between the teeth for about 15 minutes a day. Spit out the now toxic mixture and brush your teeth. Then massage the gums with sesame oil. Sesame oil is vasodilator which will open blood channels to the gums.
Sesame oil is high in calcium oxalate that can feed the teeth.
The swishing is intensely cleansing for the teeth-gum margins. The reason I ask is that I know sesame oil has some minerals including iron.