Dental Implant Glossary Dentin   The part of the tooth directly underneath the enamel.  It is softer, contains more water, and has                           microscopic nerve endings.  Dentin is much more susceptible to decay, abrasion from toothbrushing                           and bruxism, and is responsible for many sensitivity reactions when it is exposed in the mouth. Source: http://www.dentalleaders.com

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