The Primary Dentition

Question 1

Primary Dentition Features?

five points

Answer 1

20 teeth,
Whiter in colour,
Enamel and Dentine layer are thinner (than permanent),
Pulp chambers are bigger,
Shorter roots

Question 2

Maxillary central and lateral features? (51, 52, 61, 62)

Answer 2

rounded disto-incisal angle
sharp mesio-incisal angle
centrals have large palatal cingulum, laterals less pronounced

Question 3

Mandibular Incisors Features? (71,72, 81, 82)

centrals (3) laterals (3)

Answer 3

Centrals- smallest tooth in the mouth, more symmetrical than laterals, single tapered root inclines distally
Laterals- incisal edge sloped towards distal, crown more fan shaped, root longer and more distally inclined

Question 4

Maxillary Canine Features? (53, 63)

four points

Answer 4

Diamond shaped,
Central cingulum,
Wider than mandibular,
Mesial and distal fossa

Question 5

Mandibular Canine Features? (73, 83)

three points

Answer 5

Distal slope is longer than mesial slope,
Narrower than maxillary,
Contact points higher (incisal 3rd)

Question 6

Primary Maxillary First Molar Features? (54, 64)

five points

Answer 6

Molar tubercle of Zukerkandl (on MB),
Buccal cusp is higher than palatal,
Trapezoid in outline,
Crown is wider on buccal than palatal,
3 roots, 2 buccal, 1 palatal

Question 7

Primary Mandibular First Molar Features? (74, 84)

four points

Answer 7

Molar tubercle of Zukerkandl (on MB),
Rectangular outline (longer mes/dist),
Four cusps, MB &ML much larger than DB &DL,
2 roots, mesial and distal