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The anatomy of a tooth January 17, 2013

Filed under: Dental health — Mall of Georgia Dentistry @ 12:05 pm
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Have you ever wondered how your tooth is constructed and what all its component parts do?  Here’s a look:

Anatomy_of_a_Tooth-465x500

Enamel

Enamel is the hardest substance in the body and gives each tooth the strength to bite through all of the food that we eat.  Although enamel is extremely strong, it can easily be dissolved by the acids that plaque produce and the acids that are found naturally in many popular drinks.

Dentin

Dentin is the layer right under the enamel.  Although not as hard as enamel, it is about as hard as bone.  Dentin also is flexible.  For example, if you bite down on a very hard object, the dentin is able to flex a little bit and can keep your tooth from cracking like it might if teeth were just made of enamel.

Pulp

The pulp is the inner-most layer of the tooth.  The pulp provides nutrition to the tooth.  It has been suggested that when the pulp is removed from a tooth, for example during root canal treatment, the tooth becomes more brittle and prone to breaking.

The pulp also provides the nerves to the tooth.  Have you ever noticed that if you eat ice cream right after a hot meal your teeth don’t transmit a message of cold, they just transmit a message of pain?  Interestingly, the only nerves that go to the brain from the tooth transmit pain.  There is no temperature or pressure sensation in a tooth.

Cementum

Cementum is a very thin layer that coats the roots of the teeth and attach the teeth to the peridontal ligament, which is connected to the bone.

Gingiva (Gums)

The gums form a collar or sheath around the teeth that protects the underlying bone.  When you stop brushing your teeth for an extended period of time, the gingiva become red and puffy.  This is their method of defending against the plaque that has built up.  If you completely stop brushing, the gingiva will eventually start to lose the war against plaque and “fall down” from around the teeth resulting in gum disease that can eventually make your teeth fall out!

Periodontal Ligament

The main function of the periodontal ligament is to attach the teeth to the bone.  The peridontal ligament also sends sensory information to the brain.  For example, if you are eating some popcorn and bite down hard on a popcorn kernel, your jaw suddenly opens to alleviate the pressure.  The periodontal ligament sends that pressure signal to your brain, causing that reflex.

The tooth doesn’t feel the pressure since the tooth is only capable of sending pain messages to your brain.

Bone

The bone holds the whole tooth in its place.  The bone is constantly remodeling itself in response to various forces it experiences in the mouth.  For example, if you have braces on, there are forces pushing on the teeth.  The bone remodels itself to help the tooth move to the position in which it is being pushed.

So, there you have it – complex yet simple at the same time.  Certainly something you want to take care of and ensure last you a life time.  And, we’re sure you can guess the best way you can do that – that’s right, regular dental visits and brushing and flossing regularly.

Mall of Georgia Dentistry

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