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6 Functions of the teeth
1. protection of oral cavity
6. aid in digestion
actual crown and actual root; never depends on eruption; never changes other than through attrition or other physical wear
what is seen clinically; the protion of the crown and or root that is visible and not covered by gingiva
enamel lost by chemical means and what are they
-acid content of vomit
-overuse of acid containing
-lies between pulp chamber and primary dentin
-formed after completion of apical foramen
-more calcified than primary dentin
-forms at a slower rate than primary dentin
continues to form throughout the life of the tooth
-provides protection to pulp horns; reduces overall pulp chamber
formed in response to trauma; located directly beneath trauma; cavity preparation, decay, occlusal stress
-bone like substance covering tooth's root
-main function:provides attachment medium for tooth to the alveolar bone
-thin at CEJ
thicker at apex
secondary; only at apical 1/3; can reproduce itself and compensate for occlusal wear (attrition) formed at a faster rate
Junction of enamel patterns
60-65% of all teeth overlap - cementum overlaps a small part of the enamel
30% of all teeth meet - cementum meets enamel edge to edge
5-10% of all teeth gap - cementum and enamel do not meet; exposes dentin; adds to probability of sensitivity
supply WBC's to fight bacterial invasion and nourishment to activate and support the formation of secondary dentin
What 5 things does the pulp consist of?
1. blood vessel
2. lymph vessels
3. connective tissue
4. nerve tissue
5. lined with odontoblasts
function of canines
-hold or grasp, used as weapon or tool
-strong anchor at the corner of the mouth due to the wedge shape in cross-section
rounded linear elevation of enamel that form mesial or distal borders of occlusal surfaces on posterior teeth and mesial and distal boarders on lingual of anterior teeth
ridge that descends from the tips of the cusps of molars and premolars toward the central part of the occlusal surface
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