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Flashcards in TEETH Deck (21)
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1

What is the lingual surface of the teeth

faces the tongue

2

What is the labial surface of the teeth

Surface of incisors and canines facing the lips

3

What is the buccal surface of the teeth

surface of canines, premolars and molars facing the cheeks

4

What is the occlusal surface

Surface of all teeth that parallels the plane in which upper and lower dentition meet

5

What is the milk/deciduous dentition

baby teeth

6

Explain how to write a dental formula

goes by incisor, canine, premolar, molar on one side (upper dentition/ lower)

for humans it is

2.1.2.3/2.1.2.3

which means 2 incisors, 1 canine, 2 premolars, 3 molars on one side of the mouth upper/lower

7

What is an angles classification

refers to malocclusion which is misalignment of dental arches

defined by the position of the upper first molar mesiobuccal cusp in relation to the lower first molar

8

What are the 3 angle classifications

Angle class 1: normal

Angle class 2: Buccal groove of the first lower molar is distally positioned with the mesiobuccal cusp of the 1st maxillary molar

Angle class 3: Buccal groove of the first lower molar is mesially positioned in occlusion with the mesiobuccal cusp of the first maxillary molar

9

What are the layers of the teeth

Enamel
Dentine
Dental cement

10

Describe enamel

Covers tooth crown. Very strong made of fibre like mineral crystals and water and protein to hold fibres together

11

Describe dentine

Forms most of tooth. Composed of mineral component and organic matrix of collagen fibres. Underneath enamel and encapsulates pulp cavity

12

Describe dental cement

Bone like tissue that covers external surface of tooth roots. Made of mineral component and organic matrix of collagen fibres. Attaches periodontal ligament to the surface of root

13

How is age estimated from teeth

Tooth eruption allows this to be estimated because specific teeth fall out at specific points

M1 = 6 years

M2 = 12 years

M3 = 18 years

14

What are the bands of retzius

incremental growth lines or bands seen in enamel. They deposit in enamel every 7 days. Once they reach the surface they are called perikymata.

15

How does hard food and soft food cause tooth wear

Hard food = crushing = complex, pits

Soft food = shearing = simple, scratches

16

What is a dental calculus and a dental caries

Calculus: mineral plaque which can be analysed to see what was trapped and thus the diet of fossils

Caries: Change in diet is reflected due to dental changes

17

What can counting bands of retzius show us

Estimate death of fossils

Rapid development

Breastfeeding, due to Ba levels increasing during breastfeeding

18

Describe incisors

Look: Flat and blade like

Root: 1 root
upper = triangular
lower = compressed mesiodistally

Crowns:
upper = shovel shape
lower: chisel shapes

19

Describe canines

Look: narrow

Root: long
lower are more compressed and sometimes have accessory root

Crowns:
conical, tusk like, single central cusp

20

Describe premolars

Roots:
Upper = double roots
Lower = single conical root

Crowns: round, 2 cusps

upper: strong occlusal groove, more oval

lower: large buccal cusp than lingual, sometimes 3 cusps, weak median groove, more circular

21

Describe molars

Look:: larger and square grounds

Root: Usually 3 roots variably fused, lower has usually 2

Crowns:
Upper: 3-4 cusps, outline is rhombus
Lower: 4-5 major cusps, outline is square, rectangular, oblong