dental lecture clin pro
Terms
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- What is the crown?
- the portion of tooth above the gum line, covered by enamel.
- What is the root?
- The portion of the tooth below the gum line, covered by cementum
- What is enamel?
- The hardest tissue in the body.95% calcium. Formed by ameloblasts- cannot repair itself
- What is dentin?
- 2nd hardest tissue in the body. Covered by enamel on the crown and cementum on the root. Formed by odontoblasts. Can repair itself. (tertiary dentin=brown spot)
- What is cementum?
- Covers root. Protects dentin and seals openings of dentinal tubules. Formed by cementoblasts.
- What is pulp cavity?
- Soft tissues of the tooth- odontoblasts, arterioles, venules, nerves, connective tissue. Cannot expand.
- What is the apex or apical delta?
- entry of blood vessels, nerves and lymphatics at bottom of root.
- What is periodontal ligament?
- net-like elastic ligament attaching cementum to bony alveolus- shock absorber
- What is alveolus?
- bony socket where tooth resides. Tip=alveolar crest-declines during lifetime orif diseased.
- What is gingiva?
- Gum tissue. Protects bone and attachment of tooth. Each tooth has collar of gingiva.
- What is gingival sulcus?
- The attachment of gingiva to cementum. Normal depth in dogs = 0-3mm/ feline = 0-1mm
- What is furcation?
- the space between the roots of a tooth
- what is apical?
- towards the root
- coronal
- towards the crown
- cervical
- toward the neck- junction of the coronal and apical tooth
- mesial
- toward the midline of the dental arch
- rostral
- toward the front of the head-also mesial in the cheek teeth.
- distal
- away from midline of the dental arch- also caudal in the cheek teeth.
- buccal
- surface facing the cheeks
- facial
- surface facing the front lips
- labial
- surface facing the cheeks in the mandible.
- lingual
- surface of mandibular teeth facing the tongue
- palatal
- surface of maxillary teeth facing the hard palate
- sublingual
- surface beneath the tongue
- interproximal space
- space between adjacent teeth
- interproximal surface
- the adjacent surfaces of two adjoining teeth
- incisal
- biting surface of incisors
- occlusal
- grinding surface of the molars
- when do deciduous teeth erupt in dogs?
- 3-4 weeks for incisors, 3 weeks for canines and 4-12 weeks for premolars
- when do deciduous teeth erupt in cats?
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incisors= 2-3 weeks
canines= 3-4 weeks
premolars= 3-6 weeks - when do permanent teeth erupt in dogs?
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incisors= 3-5 months
canines= 4-6 months
premolars= 4-6 months
molars= 5-7 months - when do permanent teeth erupt in cats?
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incisors= 3-4 months
canines= 4-5 months
premolars= 4-6 months
molars = 4-5 months - what is the dental formula for the dog
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permanent=42
2(I3/3, C1/1, P4/4, M2/3)
decid= same except only 3P and noM - dental formula for the cat
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permanent= 30
2(I3/3, C1/1, P3/2, M1/1)
decid= same except no M - which teeth are used for tearing?
- canines and premolars
- what is the true shearing teeth?
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carnassial-
dog=4th upper PM and lower 1st M.
cats= 4th upper PM and lower molar - what are the bones of the face?
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incisive-upper incisors
maxilla-upper canine and cheek teeth
palatine-hard palate
mandible-all of lower teeth - what are the nerves of the mouth?
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trigeminal nerve=5th cranial nerve, chewing.
hypoglossal nerve-tongue - what is the pH of saliva?
- 7.5-promotes plaque
- where are salivary glands?
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parotid-upper P4
sublingual-lingual to lower cheek teeth
zygomatic-lateral to M2 - where is the heaviest calculus
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buccal surface upper cheek and canines
lingual surface of lower teeth
buccal surface of lower cheek teeth
palatal surface of upper cheek teeth - what is another name for the cervical line?
- CEJ- cemento-enamel junction
- what is the triadan numbering system?
- mouth has 4 quadrants- 1 is upper R, 2 upper L,3 is lowerL, 4 lower R-every #ending with 4 is a canine, every # ending with 9 is a 1st molar.
- how many molars does the dog have?
- 2 on top, 3 on bottom
- how many molars does the cat have?
- one on top, 1 on bottom.