Besides fluoride, what is better to prevent tooth decay?

Xylitol: Xylitol gum and mists are being shown to have an effect on the bacteria that cause tooth decay.

Several things: Good diet with limited frequency of sugar consumption and meticulous oral hygiene practices which include brushing, flossing and rinsing.

Diet!: Sugar consumption is the biggest factor in tooth decay. Manage the food and you control the bacteria. The most important detail here is the timing: sugar changes the the ph balance in your mouth for around 1 hour. Talk with your dentist about timing and diet management.

Not better, but: In addition to proper use of fluoride, healthy diet, proper brushing and flossing, and dental sealants all help to prevent tooth decay. One is not better than the other. All of these things working together are necessary for good dental health.

Fluoride is: Just one part of the equation. A similar analogy is which soap should I use to wash my hands? The toothpaste is merely the cleaning agent - the techniques employed are whats important. Also diet, sugar intake - juices, coffee, sodas, tea, candy ... All play a role. A good oral hygiene technique is using a mechanical toothbrush, a waterpik and interdental picks as part of your regimen. Hope.