A17

Question 1

Heterodenty

Answer 1

• Incisors
• Canines
• Premolars
• Molars

Question 2

Diphydont

Answer 2

the first set of teeth will get replaced - incisors, canines and premolars (except the first premolar)

molars are not present in the first set

Question 3

Dentes decidui vs permanentes

Answer 3

Decidui : milk teeth, replaced by permanent

Permanentes: las and permanent seet - molars

Question 4

polyphyodont dentition

Answer 4

multiple sets of teeth erupt through the life (shark)

Question 5

Thecodont

Answer 5

teeth are implanted in socets set along the margin of the jaw

Question 6

Diastema

Answer 6

gap between the incisors and permolars

Question 7

anelodont

Answer 7

limited growth period

Question 8

elodont

Answer 8

grows throughout life - rodents

Question 9

Different anatomical structures based on diet

Answer 9

carnivorous

omnivorous

herbivorous

Question 10

Composition of the tooth

Answer 10

clinical crown - exposed

anatomical crown - covered in enamel

clinical root - below gumline

anatomical root - not covered in enamel

Question 11

Brachyodont teeth

Answer 11

in Ca and Sus

Corona dentis

• the portion that projects into the mouth
• covered in enamel

Collum/cervix dentis

• located in the gumline
• end of enamel, start of cement

radix dentis

• apex raditis dentis - tip of the root
• encased in cement - softer and more yellowish

Question 12

Hypsodont teeth

Answer 12

Eq + Ru

Corpus dentis

• there is no corona and cervix

Corona clinica

• free portion which is surrounded at its base by the gums, the exposed part

radix dentis

• short

radix clinica

• embedded portion

infundibulum dentis

• invagination of enamel on the occlusal surface
• lingual surface of some incisors of fe and bo
  *

Question 13

Hypsodont vs brachiodont

Answer 13

Hypsodont

Brachyodont

High crowned

Mineralised layers are arranged in folds

The whole crown is covered by enamel
Anatomical root: not covered by enamel and Short in hypsodont
No radix dentis: boar, incisor of rodents

Grows trough out, worn down

Short, strong
Completes their growth quickly

Question 14

Surfaces of the teeth

Answer 14

Fascies vestibularis

fascies lingualis

fascies occlusalis

fascies contactus

• mesialis
• distalis

Question 15

Cavum dentis (pulpare)

Answer 15

branches into each major elevation of the crown and into each root

cavum coronale dentis

cavum radicis dentis

Filled with:

Pulpa dentis

Question 16

Pulpa dentis

Answer 16

composed of connective tissue, nerves,a rteries and veins. surrounded by non expansive tissue (this leads to pain with inflammation

pulpa coronalis

pulpa radicularis

Question 17

Where can nutrients enter?

Answer 17

Foramen apicis dentis - small, opens at the end of each root and allows free passage of the vessels and nerves (mostly sensory) in and out of the tooth through the root canal

Question 18

layers os the tooth

Answer 18

Dentinum

enamelum

cementum

peridontum

Question 19

Dentinum

Answer 19

Dentinum

• dentin
• hard, yeloowish white
• produced by odontoblast
• contains the dental cavity

Question 20

Enamelum

Answer 20

Enamelum

• produced by adamantoblast, ectodermal origin,not possible to regenerate
• pearl white colour
• hardest substance in the body
• the amount of enamel divides the teeth into brahyodont or hypsodont

Question 21

cementum

Answer 21

cementum

• cementoblast
• very similar to bone
• outermost

Question 22

peridontum

Answer 22

peridontal ligament or membrane

anchors the root to the alveolar wall, strong collagenous bundles which will keep the teeth from being pushed further down into the alveolar process during mastication

Question 23

Types of teeth

Answer 23

incisive

• central, intermediate and corner incisor
• 3 on each side in all the domestic mammals both on maxilla and mandibular
• Ru does not have on maxilla - dental pad instead

canine

• absent in ruminant on maxilla

premolares

• first four cheek teeths in pig and dog
• ruminents only have 3
• Equine normally have 3 but may have
  
  • dens lupinus - the first premolar, rudimentary and inconsitant, very small, on maxilla

molars

• last threee teeth in each jaw
• not preceeded by decidous teeth
• normally 3 ( may be 2 in upper jaw of dog)

sectorius

• only in carnivores
• last upper premolar and first lower molar
• large cutting tooth

Question 24

blood supply of the teeth

Answer 24

Arterious

Upper teeth

A. Maxillaris

• A. Infraorbitale
• Rami dentales

Lower teeth

A. Maxillaris

• A. Alveolaris inferior/mandibularis
  
  • Rami dentalis

Veins

V. profunda faciei

• V. infraorbitalis
  
  • rr. dentales to upper teeth

V. maxillaris

• V. alveolaris mandibularis - similar to artery

Question 25

Innervation of the teeth

Answer 25

N. infraorbitalis ( ex N. maxillaris V2)

runs in canalis infraorbitalis and gives of r. alveolaris inferiores

• caudales: molares and sinus maxillaris
• medii: rest of the molars, premolars, ginigva and sinus maxillaris
• rostralis: canine and incisors

N. alveolareis inferior (ex N. mandibularis V3)

• runs in canalis mandibularis, enterin the foramen mandibularis in fossa pterygoidea exits as n. mentales in for(amina) metnal (ia)

Question 26

Steps of tooth development

Answer 26

1. ribbon like thickening of eptihelium - dental lamina
2. bud - ectomesenchyma
3. cap - dental mesenchyma
4. bell - dental papillae and follicle
5. odontooblasts - produces predentin
6. denteogenesis
7. amelogenesis