How many sets of teeth do humans have in their lifetime and what are they called?
2 sets:
Deciduous
Permanent
What are the 4 basic teeth type?
- Incisor
- Canines
- Premolars
- Molars
Name a characteristic of incisors
They have a horizontal incisal edge
Name a characteristic of canines
They have a single large cusp
Name a characteristic of pre molars
Have 2 cusps of varying sizes
They are not found in deciduous teeth
Name a characteristic of molars
Have 4 or 5 cusps
What are cusps?
Chisel like edge on occlusal surface of tooth
How many teeth are there in a deciduous dentation?
20
Which teeth are found in the deciduous dentation?
2 upper and lower central incisors on both left and right side
1 upper and lower canine on both left and right side
2 upper and lower molarson both left and right side
So 20 in total
How many teeth are there in a permanent dentation?
32
Which teeth are found in the permanent dentation?
2 upper and lower incisors on both sides
1 upper and lower canine on both sides
2 upper and lower premolars on both sides
Upto 3 upper and lower molars on both sides
What are the main differences between permanent and deciduous dentition?
Permanent dentition has 2 upper and lower pre molars on both sides deciduous dentition doesn’t
How do we split the dentition?
Into 4 quadrants;
Upper right
Upper left
Lower left
Lower right
What are the 3 main systems for tooth classification?
- The full anatomical name
- Alphanumeric/ Zsigmondy system
- FDI system
How would you classify a tooth using the full anatomical name?
You’d give the tooth’s:
1. Position (Maxillary or mandibular)
2. The side (left or right)
3. The relative position (Lateral, central, 1st etc)
4. The dentition (deciduous or permanent)
5. Tooth type (incisors etc)
What is the full anatomical name of the upper right adult first molar only found in adults?
The maxillary right 1st permanent premolar
How would you classify a tooth using the Alphanumeric/ Zsigmondy system ?
Quadrants are names UR, UL, LL, LR
Individual teeth are numbered in PERMANENT teeth with central incisors being 1 and 3rd molars being 8
Individual teeth are given a letter in DECIDUOUS teeth with central incisors being A and 2nd molars being E
How would you classify the upper right permanent canine using the Alphanumeric/ Zsigmondy system?
It would be the UR3
How would you classify a tooth using the FDI system?
The quadrants are replaced with numbers
Deciduous:
UR=1, UL=2, LL=3, LR=4
Permanent:
UR=5, UL=6, LL=7, LR=8
Individual teeth are ndividual teeth are numbered in with central incisors being 1 and 3rd molars being 8
How would you classify the upper right baby canine using the FDI system?
It would be: 1 3
How would you classify the lower left 1st deciduous molar using the Alphanumeric/ Zsigmondy system?
It would be: LLD
How would you classify the lower left 1st deciduous using the FDI system?
It would be the 3 4
What is the medial surface?
Surface pointing towards the midline
What is the distal surface?
Surface facing away from the midline
What is the lingual surface?
Surface facing towards the tongue
What is the palatal surface?
Surface facing towards the tongue
What is the vestibular surface?
Surface pointing away from the tongue (towards the cheek)
What is the buccal surface?
Surface pointing away from the tongue (towards the cheek)
What is the occlusal surface?
The biting surface
Which tooth type has a horizontal incisal edge?
Incisors
What are chiesal like surfaces on the tooth called?
Cusps
What is the surface facing toward the tongue called?
Palatal ot lingual surface
Which tooth type has one large cusp?
Canines
What os the surface pointing towards the midline called?
The medial surface
Which tooth type has 2 cusps of varring sizes and is only found in decisuous teeth?
Pre molars
What is the surface facing away from the tongue (towards the cheek) called?
The buccal or vestibular surface
Which tooth type has 4 or 5 cusps?
Molars
What is the surface facing away from the midline called?
The Distal surface
What is the biting surface called?
The occlusal surface
