Dental Anatomy and Physiology
{"Image DocumentName": "Dental Anatomy and Physiology", "Image ImageDescription": "Dental Tissues\u2014Dentin2. Softer than enamel. Susceptible to tooth wear (physical or chemical) Does not have a nerve supply but can be sensitive. Is produced throughout life. Three classifications. Primary. Secondary. Tertiary. Will demineralize at a pH of 6.5 and lower. Softer than enamel. Susceptible to tooth wear (physical or chemical) Does not have a nerve supply but can be sensitive. Is produced throughout life. Three classifications. Primary. Secondary. Tertiary. Will demineralize at a pH of 6.5 and lower. Primary dentin forms the initial shape of the tooth. It is usually completed 3 years after tooth eruption (for permanent teeth). Secondary dentin is deposited after the formation of the primary dentin. Secondary dentin forms on all internal aspects of the pulp cavity, but in the pulp chamber of multirooted teeth it tends to be thicker on the roof and floor than on the side walls. Tertiary dentin, or reparative dentin is formed by replacement odontoblasts in response to moderate-level irritants such as attrition, abrasion, erosion, trauma, moderate-rate dental caries, and some operative procedures. It usually appears as a localized dentin deposit on the wall of the pulp cavity immediately subadjacent to the area of the tooth that has received the injury.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}