There are combined BS(BA)/DDS(DMD) programs, but theyre good if you already know you want to do dentistry. These programs have their pros and cons, pros being that you get the benefit of not having to stress about what pretty much everyone on this forum is going through or will go through.
The downsides, however, are that you might be "stuck" in a particular location for 7+ years. These programs also require you to maintain certain GPAs and DAT score and may or may not give you the freedom to take courses you would want to take.
If you are interested in these programs, start with dental schools you would be interested in attending and look into their accelerated program. Many state schools offer this, as well as dental schools that are apart of a university with an undergraduate college, ie UoP.
Otherwise, the traditional route would be to enter college, complete the prequisites, and apply to enter dental school upon completion of your bachelors degree.