Answers:
To hold on to your mouth full-bodied! :)
Dentistry, more appropriately "dental medicine", is the art and science of prevention, diagnosis, and treatment of conditions, diseases, and disorders of the oral cavity, the maxillofacial region, and its associated structures as it relates to human beings. While the work of dentists is regularly surgical surrounded by spirit, dentists can and do treat frequent diseases of the oral cavity and frontage chemotherapeutically (i.e. near prescribed medicines).
well...character...a dentist can grasp places and do alot more than a toothbrush can!! AND... r u gonna drill ur cavitity?
The biggest purpose is to preserve your teeth and mouth natural. You'd be amazed at the diseases that can go on from poor dental robustness.