LECTURE 8 teeth Flashcards Preview

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Flashcards in LECTURE 8 teeth Deck (21)
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1
Q

function of teeth

A

ingestion and mechanical breakdown of food

2
Q

2 sets of teeth/dentition

A

primary/deciduous teeth, permanent teeth

3
Q

types of permanent teeth

A

incisors (rip, cut), canines (tear and pierce), premolars (grinding), molars (grinding)

4
Q

articulations of teeth

A

mandible and maxilla, covered with gingiva (oral mucosa, gums)

5
Q

type of joint of teeth

A

gomphosis (peg in socket with ligament), periodontal ligaments (collage fibers) anchor tooth in bony socket (continuous with gingiva, cementum attaches external surface of tooth to periodontal ligament), synarthrosis, teeth are not bone but are part of skeleton

6
Q

regions of teeth

A

crown (projects into oral cavity), neck (gumline), root (beyond neck in alveolus of bone)

7
Q

description of enamel of teeth

A

covers crown of tooth, avascular and acellular (calcium salts), hardest substance in body (harder than bone, not renewed or replaced)

8
Q

description of dentin of teeth

A

deep to enamel forming bulk of tooth, made of minerals and collagen, harder than bone but softer than enamel, maintained during life

9
Q

description of pulp cavity of teeth

A

center of tooth, loose CT with vessels and nerves, supplies nutrients to hard tissues

10
Q

description of root canal of teeth

A

portion of pulp cavity in the root

11
Q

description of apical foramina of teeth

A

opening into the root canal at the tip of each root for blood vessels and nerves

12
Q

blood supply to teeth

A

superior/inferior alveolar artery, branches of external carotid artery

13
Q

innervation of teeth

A

trigeminal nerve V, maxilla: superior alveolar nerves, mandible: inferior alveolar nerves

14
Q

teeth at birth

A

no teeth are erupted (developing in mandible/maxillae), jaw covered by gingiva

15
Q

teeth at 6 months

A

lower central incisors first to appear, 20 deciduous teeth by age 2, no premolars

16
Q

deciduous dental formula

A

2I, 1C, 2M/2I, IC, 2M x 2 = 20 teeth

17
Q

teeth in adolescence to adulthood

A

permanent teeth enlarge and develop, roots of deciduous teeth reabsorbed, teeth loosen and fall out, begin to erupt from 7-13 years of age, third molars (wisdom teeth) emerge from 17-25 years (may be absent)

18
Q

adult dental formula

A

2I, IC, 2P, 3M/2I, IC, 2P, 3M x 2 = 32 teeth

19
Q

description of cavities of teeth

A

caries, demineralization of enamel by bacteria, in severe cases erodes dentin of tooth, most sever cases erosion penetrates pulp cavity

20
Q

description of gingivitis

A

inflammation of the gingiva cause by plaque accumulation, leads to periodontitis

21
Q

description of periodontitis

A

infection of periodontal ligament leading to its destruction along with the bone around the teeth