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Function of Anterior Teeth. Tear/Incise Food Function of Posterior Teeth. Grind Food Portion of the tooth that extends from the Incisal or occlusal surface to the CEJ.. Anatomical Crown. Also referred to as the cervical line .. Appears as a slight constriction that encircles the tooth... CEJ ( Cementoenmael Junction) The Visible Portion of the Anatomical Crown. Clinical crown Area Where the Root Divides. Furcation. The actual division into 2 OR more roots.. Furrow Same Arch Touches Or Meets... Contact Area. Contact Area = Two Purposes.. 1) Food Trap (Prevent) 2) Stabilize Dental Arches. What can eliminate a contact area? Tooth Movement. Loss of Teeth. Poorly contoured Restorations. Good Contact = Stabilizes the teeth to prevent drifting or tipping and protect soft tissues. No Contact = Food Impaction resulting in tissue damage and Plaque Build Up. Continuous with the inter-proximal space between the teeth.. Embrasures. Covers the anatomical Crown of the Tooth and Varies in Thickness in Different Area's of the tooth... Enamel. Enamel is thicker at .. The Incisal and Occulusal Surface. Hardest tissue in the body and is very brittle... Enamel. What color is enamel? Yellowish white to grayish white, but also depends on the underlying dentin. Enamel is composed of rods (prisms) that are formed as cells called.. Ameloblasts. The bulk of the tooth is made up of .. Dentin. 2nd hardest material in the body... Dentin. The hard connective tissue lying just inside the enamel and cementum.. Dentin. Normally yellowish white and darker than enamel and slowly darkens with age.. Dentin. Dentin is distinguished by enamel by.. Dentin = Dull flat appearance. Enamel= translucent and shiny. With Explorer (when scratched) Dentin = Enamel= Dentin = Dull Sound. Enamel= High Pitch. Formed by cells called odontoblasts and develops with the pulp from dental papilla of the tooth bud... Dentin. 3 Major Types of Dentin... 1)Primary. 2) Secondary. 3) Reparative. Produced before the tooth erupts and shortly after eruption... Primary Dentin. A continuation of primary dentin that forms at a slower rate as the tooth ages and throughout the life of a tooth.. Secondary Dentin. _____________ OR tertiary dentin forms rapidly when tooth has received an excessive stimulus from caries, cavity preparation , OR other trama... Reparative. A Defense reaction to an area of injury.. Reparative Dentin. Ridge of enamel on the base or margin of a tooth.. Cingulum. The hard dental tissue covering the anatomical roots of teeth.. Cementum. Cementum is fromed by cells called.. Cementoblasts Cementum appears.. Light yellow, slightly lighter than dentin. Cementum is visible on teeth where.. The gingiva had receded or has been removed. Dentin has.. - High Fluoride content of all materialized tissue. - Does NOT have it's own blood supply. -Rely's on the periodontium ligament for nutrition. Two Types of Cementum.. !) Acellular 2) Cellular Extends from the cementoenamel junction toward the root apex covering a large portion of the tooth.. Acellular Cementum. Cannot Replace itself if it is diseased or has been removed mechanically... Acellular Cementum.