Is this worth knowing?

Dentistry 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. A dentist is a doctor qualified to practice dentistry. In most countries, several years of training in a university (usually 4-8) and some practical experience working with actual patients' dentitionare required to become a qualified dentist.

The patron saint of dentists is Saint Apollonia martyred in Alexandria by having all her teeth violently extracted.

arrrgggHHHH!!!