Primary Dentition I (Ye's Version) Flashcards
How many primary teeth?
20
Primary teeth erupt from ___ to ___ months
8-30
Teeth exfoliate between ___ to ___ years
7-12
Primary teeth exfoliate just ______ permanent teeth erupt
BEFORE
Resorption of primary teeth begins ____ to ____ years after root formation is complete.
1-2 years
Primary teeth: Resorption begins at the ____ of the tooth
Apex
5 reasons for primary teeth:
1.
2.
3.
4.
5.
- Mechanical prep of food
- Maintain space: early loss causes crowding
- Speech
- Appearance
- Stimulate growth of mandible and maxilla
Primary central replaced by Permanent _________
Central
Primary Lateral replaced by Permanent _________
Lateral
Primary canine replaced by permanent _______
Canine
Primary 1st molar replaced by permanent ________
1st premolar
Primary 2nd molar replaced by permanent _______
2nd premolar
Succcedaneous teeth: the ______ teeth that replace the primary teeth
20
Other 12 permanent teeth (all molars), which erupt DISTAL to the PRIMARY second molars are called _________ teeth.
Accessional
Comparisons of primary and permanent teeth:
Primary teeth are _____ in overall crown size and dimensions than permanent teeth (some exceptions)
SMALLER
Comparisons of primary and permanent teeth:
Primary crowns are more _______
Bulbous
Comparisons of primary and permanent teeth:
Primary more ____________ cervical ridges
Prominent/pronounced
Comparisons of primary and permanent teeth:
Primary teeth have very pronounced _________ ______
Cervical constriction/constricted necks
Comparisons of primary and permanent teeth:
Which primary teeth have constricted necks???
- B surface of primary molars
- Labial & lingual surfaces of anterior primary teeth have prominent bulge in cervical third
Comparisons of primary and permanent teeth:
Primary teeth are _______ in color
Lighter
Comparisons of primary and permanent teeth:
Primary teeth have pronounced _________ ______
Cervical constriction: constricted neck of the tooth due to prominence of cervical bulge/ridges
Comparisons of primary and permanent teeth:
Enamel is ______ and has a _______ thickness of (1mm)
Thinner; consistent
Comparisons of primary and permanent teeth:
Primary teeth have ________ (large/small) pulp chambers
Large
Comparisons of primary and permanent teeth:
Primary teeth have PROMINENT pulp ______
Horns
Comparisons of primary and permanent teeth:
In primary teeth, dentin thickness is ________ over pulp horns
thin/limited
Comparisons of primary and permanent teeth:
Enamel rods in a different direction than permanent teeth. The rods at the Cervix slope _________ or ______ instead of gingivally as in permanent teeth.
horizontally or occlusally
Comparisons of primary and permanent teeth:
Occlusal convergence. Occlusal surfaces are relatively ______ than in the permanent teeth.
Smaller
Comparisons of primary and permanent teeth:
Occlusal convergence: B and L surfaces converge in PRIMARY teeth markedly toward the ______?
Occlusal
Comparisons of primary and permanent teeth:
Primary roots are proportionately _______ and ________
Longer and skinny
Comparisons of primary and permanent teeth:
Primary MOLAR root TRUNKS are _______
Short
Comparisons of primary and permanent teeth:
Primary roots of posterior teeth are very ________
Flared
Comparisons of primary and permanent teeth:
PERMANENT teeth develop in between the roots of primary _______
Molars
PRIMARY maxillary central incisor: Facial View
Crown: MD width is ______ than IG (opposite of permanent centrals). ONLY incisor in either dentition with this feature
Greater
PRIMARY maxillary central incisor: Facial View
Root length is proportionaletly ________ (smaller/greater) than permanent central incisor
Greater
PRIMARY maxillary central incisor: Facial View
Root/crown ratio for PRIMARY central =
10/6
PRIMARY maxillary central incisor: Facial View
Root/crown ratio for PERMANENT central =
13/10
PRIMARY maxillary central incisor: Facial View
Develops from _____ lobes
4
PRIMARY maxillary central incisor: Lingual View
Anatomy is _______ to permanent central incisor
Similar
PRIMARY maxillary central incisor: Lingual View
M & D marginal ridges are ______-developed
Well
PRIMARY maxillary central incisor: Lingual View
Cingulum is very _________ and extends upwards towards the _______ ______.
Pronounced; incisal edge
PRIMARY maxillary central incisor: Lingual View
The cingulum divides the _______ fossa and ________ fossae.
Lingual and ML and DL fossa
PRIMARY maxillary central incisor: Lingual View
More rounded _____ angle
Disto-incisal
PRIMARY maxillary central incisor: MESIAL AND DISTAL Views
Not the extremely well-developed ______ and _____ cervical ridges in the cervical 1/3 of the tooth.
lingual and facial
PRIMARY maxillary central incisor: Root
3 descriptions
Cone-shaped, long, slender
PRIMARY maxillary central incisor: Crown dimensions
MD > BL
MD > IG
Crown tapers from the ______ to the _____
Facial to Lingual
PRIMARY maxillary LATERAL incisor:
Similar to the primary central incisor except:
1. IG length is _______ than MD width
2. DI angle is more ______ than CI
Greater; Rounded
Primary Maxillary Canine: Facial View
Resembles the permanent _______
Canine
Primary Maxillary Canine: Facial View
Very __________ cervical constriction
Pronounced
Primary Maxillary Canine: Facial View
Mesial slope of the cusp is _______ than the distal slope of the cusp.
LONGER
Primary Maxillary Canine: Facial View
Cusp height is _______ than in the permanent teeth
LONGER
Primary Maxillary Canine: Facial View
M and D contact areas are at ________ (same/different) level(s)
SAME
Primary Maxillary Canine: Lingual View
Same anatomy as permanent maxillary canine: Contain:
- M and D marginal ridges
- Lingual ridge, ML and DL fossae
- Cingulum
Answer on front
Primary Maxillary Canine: ROOT
Root is very _______
LONG: ALMOST TWICE AS LONG CROWN
PRIMARY mandibular CENTRAL incisor:
__________ tooth in the mouth
Smallest
PRIMARY mandibular CENTRAL incisor:
- Looks like permanent mandibular incisor but is slightly _______
Longer
PRIMARY mandibular CENTRAL incisor:
Lingual anatomy is more _________
Pronounced
PRIMARY mandibular CENTRAL incisor:
More prominent ______ ridges
Marginal ridges
PRIMARY mandibular CENTRAL incisor:
Deeper _______ fossa
Lingual fossa
PRIMARY mandibular CENTRAL incisor:
DI angle is slightly ______
rounded
PRIMARY mandibular CANINE:
MANDibular canine has a ______ (thinner/thicker) neck than the primary MAXillary canine.
Thicker
PRIMARY mandibular CANINE:
Cervical ridges (NOT as/AS) _______ pronounced as the primary maxillary canine.
NOT as
PRIMARY mandibular CANINE:
Not as wide _______ as the maxillary canine
F-L
PRIMARY mandibular CANINE:
Distal cusp slope is ______ than Mesial cusp slope
LONGER
