“What Are Your Teeth Made Of?”

Posted by drgracesun on June 16, 2009 under General Dental Knowledge, Information, Nutrition and Diet, Technology | Be the First to Comment

What are your teeth made of? What is in that precious white enamel ? What is inside your teeth? Teeth play a very important role in our mental and physical health. The function of our teeth not only play a role in allowing speech, but also help us to cut and chew food as the first step in our digestion system.

It is only natural to be curious about what teeth are made of and how they function within our mouth. The root anchors the tooth below the gum’s surface into the jaw bone, while the crown of the tooth extends out past the gum. The outermost hard shiny layer of the tooth is called enamel, and is the hardest substance in the body and functions as a food grinder. 92- 96% of enamel consists of minerals (hydroxyapatite, a phosphate and calcium salt) with the remaining part being water and organic material .

Lying just beneath the hard, shiny enamel surface of every tooth is the dentin layer. This layer of the tooth is composed mainly of calcified bony-like tissue (mostly hydroxylapatite), and like bone it contains collagen, water and other organic components (and is soft in consistency). Throughout the dentin layer are tiny passageways into the deep pulpal layer, connected to the enamel layer – these passages are known as tubules. Unlike enamel, dentin continues to modify throughout a person’s entire life. Dentin can grow or reform in response to a change in tooth conditions, such as tooth decay or attrition.

The innermost layer of the tooth is known as the pulpal layer. This inner sanctum of every tooth consists of nerves and blood vessels.  This pulp benefits the teeth in several ways: primarily, the pulp keeps the organic components of the teeth healthy and properly supplied with moisture and nutrients. The pulp also conduces senses such as heat, cold and trauma from the teeth into the body’s nervous system.

The important thing to remember about your tooth structure is that it is subject to change – when bacteria and other substances (like alcohol, smoke or even sugary liquid) is introduced into your oral environment, prompt cleaning (with a toothbrush and floss) is necessary to prevent premature decay. Once decay passes through the enamel layer into the dentin, decay will progress rapidly, even when not easily detectable from visual inspection. Only when the enamel has caved in and broken down does a cavity become visible. If the cavity was not treated early and the underlying dentin layer has already decayed (which can actually extend deep into the pulpal tissue), root canal therapy may be necessary, requiring a post and crown to restore the tooth. Ultimately, prevention is the best solution. Proper home care and regular dental check-ups can detect problems early, and are usually fixed easily.