TCDHA Orofacial midterm-final review Exam Questions And Answers

TCDHA Orofacial midterm-final review Exam Questions And Answers What are the 4 tooth tissues? Which ones are hard tissues? 1. Enamel 2. Dentin 3. Cementum 4. Dental pulp First 3 are hard tissues, pulp is soft tissue Enamel characteristics 96% inorganic matter 4% organic + water Dense mineralization gives enamel the ability to resist the wear the crown of a tooth is subjected to Hardest tissue in human body Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen Dentin characteristics 70% inorganic matter 30% organic matter + water - forms main portion or body of tooth - underneath enamel + cementum - hard, dense, calcified tissue - softer than enamel, harder than cementum and bone - yellow in color + elastic in nature There is secondary dentin (adds to itself) and reparative dentin laid in response to trauma Cementum characteristics 45% inorganic, 55% organic matter - bone like substance that covers root - protects and supports tooth What is the main function of cementum? To allow attachment of tooth to alveolar bone Cellular cementum - apical 1/3 of root - can reproduce itself Acellular cementum - covers most of the anatomic root Cementoblasts Cells that produce cementum, *45% inorganic matter Pulp characteristics Housed in center of tooth, with the dentin surrounding the pulp tissue ** nourishing, sensory, dentin-reparative system of tooth What is the pulp composed of? Blood vessels, lymph vessels, connective tissue, nerve tissue (pain), and special *dentin forming cells called *odontoblasts Which teeth are least likely to have proximal root concavities? - max canine - mand central incisor - mand canine - **max central incisor