C5 - Dentition, types of teeth

Question 1

Give the number of teeth and location in:

1. Eq
2. Ru
3. Sus
4. Ca
5. Fe

Answer 1

https://quizlet.com/305930926/interspecies-apparatus-digestorius-flash-cards/

Question 2

Give the different types of teeth

What are the main parts?

Answer 2

• Bachydont:
  
  • ​Consists of:
    
    • Corona dentis
    • Radix dentis
    • Collum dentis
• Hypsodont:
  
  • Corona dentis and collum dentis are not easily distinguished
  • ​Consists of:
    
    • Corpus dentis
    • Radix dentis

Question 3

Give the main groups of theeth

Answer 3

• Incisors
• Canine
• Premolar (cheek teeth)
• Molar (cheek teeth)
• ​Dens lupinus (eq)
  
  • First upper premolar
  • Wolf tooth
  • Rudimentary, inconstant
• Dens sectorius (car)
  
  • Last upper premolar
  • First lower molar
• Dens decidui
  
  • ​Milk teeth
  • Replaced by the permanent
  • Types:
    
    • Incisors
    • Canine
    • Premolar (with exception of the 1^st premolar)
  • Ø molars in decidus dentition
• Dens premanentes:
  
  • ​Permanent teeth

Question 4

Give the main groups of theeth

Answer 4

• Incisors
• Canine
• Premolar
• Molar
• ​Dens lupinus (eq)
  
  • First upper premolar
• Dens sectorius (car)
  
  • Last upper premolar
  • First lower molar

Question 5

What do all teeth form together?

Answer 5

• Arcus dentalis superior (formed by all of the upper teeth)
• Arcus dentalis inferior (arch formed by all of the lower teeth)

Question 6

Teeth of carnivores

Answer 6

• The dentition of the dog consists of tuberculate teeth
• Well developed roots
• Brachydont type
• Incisors:
  
  • Cingulum:
    
    • ​Ridge on facies lingualis of the crown near the neck
    • Connects cristae marginales
  • ​ Crista margialis:
    
    • ​Ridge on each contact border of facies lingaulis of the crown of incisors
• Molars:
  
  • ​Lower M1 and M2 have two roots
  • Lower M3 have one root
  • Upper M1 and M2 have 3 roots
• Deciduous dentiton:
  
  • ​For the first 3 weeks of life there are no teet
  • Complete within 1,5 month (ø upper and lower P1: 3,5-6 months)

​

• Dens sectorius (ca)
  
  • Last upper premolar
  • First lower molar
  • Cutting tooth
• Figure:
  
  • 1: dentition
  • 2: cingulum and crista marginalis
  • 3: dens sectorius (ca)

Question 7

Teeth of ruminants

Answer 7

• Incisors and canine:
  
  • Absent from upper jaw, replaced by dental pad (pulvini dentalis)
• Lower incisors are named:
  
  • 1: central
  • 2: first intermediate
  • 3: second intermediate
  • 4: corner incisors
• Incisors:
  
  • Cingulum:
    
    • ​Ridge on facies lingualis of the crown near the neck
    • Connects cristae marginales
  • Crista margialis:
    
    • ​Ridge on each contact border of facies lingaulis of the crown of incisors
• Cheek teeth:
  
  • Hypsodontal type
  • Upper cheek teeth increase in size from rostral to caudal
  • Upper premolars have one infundibulum
  • The upper molars: 3 roots, 2 infuncibulum
  • Lower premolar and molars: 2 roots

Question 8

Teeth of horses

Answer 8

• Hypsodontal type

Incisors:

• Incisors are named:
  
  • 1: central
  • 2: intermediate
  • 3: corner incisors
• Shape:
  
  • Young animals: base and apex of the pyramid is flattened
  • The body of the pyramid is roundish in cross section, and triangular proximally
• Has a centrally placed infundibulum (cup)
• Age determination:
  
  • Before the tooth is used: (younger)
    
    • Enamel of the infundibulum is continous with the external enamel
    • An annular fold is present on occlusal surface
  • Criteria to estimate the age of the horse:
    
    • Eruption and wear of the dciduous incisors
    • Eruption and wear of the permanent incisors
    • Shape of the occlusal surface of the permanent incisors
    • Profile angle between the upper and lower incisors
  • 2 year: all incisors in wear
  • 10 years: galayne’s groove
  • 11 years: incisors hook
  • 12 years: dental star-central
  • 13 years: elongation of teeth
  • 17 years: lower incisors triangular angle increase
  • 20 years: galayne’s groove entire length of the tooth

Caninus:

• Only in males
• Diastema: Between canine and cheek teeth

Upper premolars, molars:

• _​_2 infundibula
• 3 roots

Lower premolars, molars:

• Ø true infundibular
• 2 roots

Dens lupinus (eq):

• Wolf tooth
• Upper P1
• Rudimentary, inconstant
• Falls out when animal is young, and not replaced

Question 9

Teeth of swine

Answer 9

• Large curved canine teeth are most striking feature of porcine dentition
  
  • They grow continuously throughout life
  • Often removed shortly after birth

Question 10

Interspecies differences

Answer 10

• Ca:
  
  • Brachydont type​
  • Dens sectorius
    
    • Last upper premolar
    • First lower molar
    • Cutting tooth
  • P2, P3, P4: have two roots, tricuspid crowns
  • Milk teeth (for the first three weeks of life there are no teeth)
• Eq:
  
  • Hyposdontal type
  • ​Dens lupinus (eq)
    
    • First upper premolar
    • Wolf tooth
    • Rudimentary, inconstant
  • Canine
    
    • ​Only in male
    • Diastema: Between canine and cheek teeth
• Ru:
  
  • Cheek teeth are hyposdontal type
  • Dental pad
    
    • ​Takes the places of the missing teeth (incisors and canines of upper jaw)