First of all I must say my best results have come from flossing more throughout the day. Flossing is really more important than brushing. It makes the biggest difference. Investing in a water pik is also a good idea and using water with a neutral PH or slightly basic.

Also I have seen better results with baking soda. And the benefit of baking soda is that it whitens teeth. Use an electric tooth brush to see faster results but it can be done with a basic brush too.

Anyways If I remember correctly flourite has a hardness that is a bit lower than apatite but close in approximation. So flourite helps fill the gaps and fortify apatite but it isn't necessary if you do not have thin enamel and healthy teeth.

Excess sugar is the #1 cause of inflammation of gums and damage to enamel. Cut excess sugar and your blood pressure goes down and inflammation of gums also goes down.

The rest that you have to do is flossing and brushing.

As for pulling with coconut oil that works too combined with brushing

Genetics does impact what results you will have along with diet.