Aloe vera has anti bacterial and anti inflammatory properties. But using an Aloe vera tooth gel is more effective for teeth and gum health than drinking it's juice. Drinking the juice might help in your overall health.

Aloe Vera is good for teeth and oral health. It does have anti cavity properties But it is essential to brush your teeth in the morning and night. And also gargle after every meal or beverage

Yes aloe vera juice helps in prevention of cavities. But you can't fully depend only on aloe vera, you need brush your teeth and floss your teeth twice daily, you can take sugar free chewing gums which is having xylitol, that will stimulate saliva and cleanse your teeth naturally. And most important is you need to have a dental checkup every six months.