Primary Dentition Flashcards
Teeth exfoliate between:
7 &12 years (Just before the permanent teeth erupt)
Resorption begins:
1-2 years after root formation is completed
Where doe resorption begin?
At apex of tooth
Why are the primary teeth important? (5)
1- mechanical preparation of food
2- maintenance of space for permanent teeth
3- speech
4- appearance
5- stimulate growth of mandible & maxilla
What happens if we have early loss of the primary dentition?
Severe crowding may occur
The primary central incisor is replaced by the:
Permanent central incisor
The primary lateral incisor is replaced by the:
Permanent lateral incisor
The primary canine is replaced by the:
Permanent canine
The primary 1st molar is replaced by the:
Permanent 1st premolar
The primary 2nd molar is replaced by the:
Permanent second premolar
The 20 permanent teeth that replace the primary teeth:
Succadaneous teeth
The other 12 permanent teeth which erupt distal to the primary second molars are called:
Accessional teeth
All of the molars are considered:
Accessional teeth
In comparison with the permanent teeth, the primary teeth are ____
Smaller in overall crown size & dimensions
In comparison to permanent teeth, the crowns of primary teeth are more:
Bulbous
In comparison to permanent teeth, the crowns of primary teeth are more bulbous because of:
More prominent/pronounced cervical ridges
In comparison to permanent teeth, the primary teeth have a more ____ cervical constriction
Pronounced
Primary teeth have a pronounced cervical constriction due to a constricted neck of the tooth due to:
Prominence of cervical bulge/ridges
Describe the color of primary teeth compared to permanent teeth:
Primary teeth are lighter in color
Describe the enamel on primary teeth compared to permanent teeth:
Thinner & has consistent thickness
The enamel thickness in permanent teeth is not:
Consistent
In sectioned permanent tooth where is in the enamel the thickest:
In the occlusal 1/3
Describe the pulp chambers in primary teeth (compared to permanent teeth)
Large pulp chambers with prominent pulp horns
Describe the dentin thickness in primary teeth vs. permanent teeth:
Dentin thickness is limited/thin over the pulp horns
In primary teeth compared to permanent teeth the enamel rods are:
In a different direction than in permanent teeth
In primary teeth, the enamel rods at the cervical slope ______ or _____ instead of ______ as in the permanent tooth
Horizontally or occlusally; gingivally
The occlusal surfaces are relatively smaller in primary teeth than in permanent teeth- this is considered:
Occlusal convergence
The roots in primary teeth are proportionally:
Longer & more slender
The roots on molars in primary teeth:
Have a shorter root trunk
The roots of posterior primary teeth are:
Very flared
Why are the roots of posterior primary teeth so flared?
Because the permanent teeth develop in between the roots of the molar
The primary maxillary central incisor develops from:
Four lobes
From a labial view of the primary maxillary central incisor- the root length is proportionally ____ than in a permanent central incisor
Greater (longer)
The root to crown ratio for the primary max central incisor:
The root to crown ratio for the permanent max central incisor:
10/6
13/10
The primary central incisors ____ width is greater than its ____ width
MD
IG
From a lingual view-
-the anatomy of the primary maxillary central incisor is similar to the ______
-the mesial & distal marginal ridges are _____
-the cingulum is very ____ & extends upwards towards ______
-the distoincisal angle is _____
Permanent maxillary central incsior
Well-developed
Pronounced; incisal edge
More rounded
On the primary maxillary central incisor what is responsible for dividing the lingual fossa partially into MD & DL fossa
The cingulum
The primary maxillary central incisor from mesial & distal views have extremely well developed _____ in the ____ of the tooth
Lingual & facial cervical ridges
Cervical 1/3
In the primary maxillary central incisor, describe the root:
Cone shaped, long, slender
Describe the crown dimensions in the primary maxillary central incisor:
MD>BL
MD>IG
On a primary maxillary central incisor the crown tapers from ______ to ______
Facial to lignual
The primary maxillary lateral incisor is similar to the primary maxillary lateral incisor except for: (2)
1- IG length is greater than the MD width
2- Distoincisal angle is more rounded than the central incisor
The primary maxillary canine-
-number of cusps
- what feature is extremely pronounced
- what cusp arm slope is longer
Single cusp
Cervical constriction
Mesial (opposite of permanent!!!)
Primary maxillary canine:
From a facial aspect:
-Compare the cusps height in the primary to the permanent
- Describe the location of the mesial & distal contacts
Cusp height is longer than in the primary tooth
Mesial & distal contact areas are at the same level
Primary maxillary canine-
From a lingual aspect:
What anatomical features are present (4)
1- mesial & distal marginal ridges
2- lingual ridge
3- ML & DL fossa
4- cingulum
From a lingual aspect of the primary maxillary canine, the root is:
Very long- almost twice as long as the crown
The primary Mandibular central incisor
-is the ____ tooth in the mouth
-the root is ____ & ____
- the root is _____ compared to the crown
- there are pronounced ______ on the facial & lingual aspects
Smallest
Long & slender
2x length of crown
Cervical bulges
The primary Mandibular lateral incisor-
-the crown is similar to the central incisor but is slightly _____
- the lingual anatomy may be _______ due to _____ & _____
- the distoincisal angle is ______
Longer
More pronounced due to more prominent marginal ridges & a deeper lingual fossa
Slightly rounded
The primary Mandibular canine-
Compared to the primary maxillary canine this canines does not have as much ________ and can therfore be said to have:
Cervical constriction; thicker neck
In the primary mandibular canine, the cervical ridges are _____ compared to the primary maxillary canine
Not as pronounced
The primary Mandibular canine is not as _____ as the primary maxillary canine
Not as wide FL
In the primary Mandibular canine the distal cusp slope is _____ than the mesial cusp slope
Longer
Primary or permanent?
- Crowns are more bulbous
- Darker in color
- Thicker enamel of varied thickness
- Pronounced cervical constriction
- Large pulp chambers with pronounced pulp horns
- Longer root trunks
- Primary
- Permanent
- Permanent
- Primary
- Primary
- Permanent
The primary maxillary 1st molar resembles:
Permanent premolar
The primary maxillary 2nd molar resembles:
The permanent maxillary 1st molar
The mandibular 1st molar resembles:
No other tooth in the mouth
The mandibular 2nd molar resembles:
Permanent mandibular 1st molar
The primary maxillary 1st molar resembles a _____ & has ____ root(s)- name them
Premolar
Three roots- 2 buccal, 1 lingual
The primary maxillary 1st molar has a _____ shaped occlusal surface with ____ cusps
Triangular shaped
3-4 cusps
If the primary maxillary 1st molar has three cusps, they are _____ if it has four cusps they are ______
Mesiofacial, distofacial, lingual
Mesiofacial, distofacial, mesiolingual, distolingual
The primary maxillary 1st molar from a buccal view:
-very ___ relative to width of crown
- cusps are ____
- much _____ than maxillary 2nd molar
- compare the MB & DB cusps
Narrow cervix
Poorly defined
Smaller tooth (almost premolar-like)
MB cusp > DB cusp
Primary maxillary 1st molar from a buccal view
- the roots are _____, ____ & _____
- _____ roots are visible
- the root trunk is ______ (CEJ to furcation)
- ____ buccal roots are present
Long, slender, & widely spread
All three
Very short
Two buccal roots
The primary maxillary 1st molar from a lingual view-
-The crown converges:
-number of cusps present:
-the ____ cusp is largest & the longest cusp on this tooth
-Describe the DL cusp:
- From this view what root(s) do we see, describe:
Lingually
1 or 2
ML
Small or absent
One lingual root- largest root
Primary maxillary 1st molar- mesial & distal views:
-crown is the widest in the ____
-the crown is narrower on the _____ (buccolingually) than on the _____
Cervical 1/3
Distal; mesial
The primary maxillary first molar has a very prominent _____ on the _____ aspect
Convexity
MB
What is an outstanding characteristic in regard to the primary maxillary 1st molar
Prominent convexity on9 the MB aspect
The primary maxillary 1st molar: Occlusal view-
-roughly ____ in outline with a broad base ____
-_____ cusp is the largest, longest & sharpest
-______ cusp is the smallest & may be absent
Triangular; buccally
ML cusp
DL cusp
Primary maxillary 1st molar: occlusal view-
List the anatomical features from this view: (5)
1- central fossa
2- mesial & distal triangular fossa
3- central, buccal, & distal developmental grooves
4- mesial & central pits
5- oblique ridge
What does the oblique ridge connect on the primary maxillary 1st molar:
The oblique ridge connects the ML & DB cusps
Primary maxillary 2nd molar:
-resembles _____
- _____ in outline
- name the cusps present
Permanent maxillary 1st molar
Rhomboidal
ML, MB, DB, DL & cusp of carabelli
The primary maxillary 2nd molar has a _____ ridge
Oblique
The primary maxillary 2nd molar has the same fossae & grooves present as the:
Permanent maxillary 1st molar
What roots are present on the primary maxillary 2nd molar:
MB, DB, L
Primary maxillary 2nd molar in comparison with the permanent maxillary 1st molar:
- ______ is very close to CEJ (short root trunk)
- Cervix is much ____ compared to the the MD diameter at the ______
Trifurcation
Narrower MD; Contact points
The primary maxillary 2nd molars may be clinically confused with:
Permanent maxillary 2nd molars
(Deciduous max 2nd molar is smaller)
Primary mandibular 1st molar:
- ____ cusps are present; name them
- _____ roots are present; name them
4 cusps: MB, ML, DB, DL
2 roots: Mesial & distal
The roots of the primary mandibular 1st molar are (2)
1- slender & widely splayed
2- short root trunk
The primary mandibular 1st molar resemble what tooth:
Does not resemble any other tooth primary or permanent!!
Primary mandibular 1st molar: buccal view-
- the crown height on the mesial is ____ that of the distal
- the CEJ dips ____ on _____
- the ____ is flat or straight
- the distal is markedly _____
Twice
Apically on mesial
Mesial contour
Convex
Primary mandibular 1st molar: buccal view-
- two distinct ____ but no ____
- extremely prominent _____ convexity
Buccal cusps; developmental groove
MB
On the primary mandibular 1st molar- buccal view- what causes the extremely prominent MB convexity (2)
1- prominent mB line angle
2- very prominent MB cervical ridge
Primary mandibular 1st molar- lingual view:
- What cusps are present
- the ML cusp is _____
- the ML cusp is in line with:
- the mesial marginal ridge is well developed & looks like:
ML & DL
Centered
In line with the mesial root
Almost like another cusp
Primary mandibular 1st molar- mesial & distal views:
Extreme ____ buccally on the ____ cusp
Convexity; MB
Primary mandibular 1st molar- Mesial & distal views:
Describe the buccal surface:
Flattened
Primary mandibular 1st molar- mesial & distal views:
Describe the mesial root
Describe the distal root
Mesial root= rectangular appearance
Distal root= tapers at the apex
From an occlusal view, the Primary mandibular 1st molar is _____ in outline
Rhomboidal
From an occlusal view of the Primary mandibular 1st molar how many cusps are present- name them:
Four
ML, MB, DL, DB
From an occlusal view of the Primary mandibular 1st molar-
Which cusp is the largest & describe the location of it:
ML cusp is the largest & centered in the lingual aspect
Primary mandibular 1st molar- occlusal view:
The mesial & distal triangular fossae are joined by:
Central developmental groove
From an occlusal view of the primary mandibular molar the triangular ridges of the ____ & ___ cusps form a transverse ridge
MB & ML
From an occlusal view of the primary mandibular 1st molar-
-what developmental grooves are present
- what pits are present
Lingual & buccal
Mesial & central
The primary mandibular 2nd molar-
- closely resembles what tooth?
- how many cusps are present and what are they
- which cusps are more equal in size
Permanent mandibular 1st molar
5 cusps: 2 buccal, 2 lingual
The three buccal cusps
The distal cusp of the primary mandibular 2nd molar is _____ compared to the permanent mandibular 1st molar
Relatively larger
On the primary mandibular 2nd molar, the two lingual cusps are:
Equal is in size
In the primary mandibular 2nd molar, the roots present are:
Mesial & distal roots (2)
The primary mandibular 2nd molar in comparison to the permanent mandibular 1st molar-
- The bifurcation of the root is:
- The roots are ____
- The three buccal cusps are:
- A cervical ____ is present
Close to the CEJ
Roots are flared
More equal in size
Constriction
Space that exists mesial to the primary maxillary canine & distal to the primary mandibular canine in some deciduous dentitions:
Primate space
The primate space is a space that exists _____ to the primary ____ & _____ to the primary _____ in some deciduous dentitions
Mesial to the primary maxillary canine
Distal to the mandibular primary canine
The combined mesiodistal widths of permanent premolars & permanent canine is less than on the combined mesiodistal widths of primary molars & primary canines- this surplus space is called:
Leeway space
The leeway space occurs with what teeth in primary dentition - for what teeth in the permanent dentition:
Primary canines & primary molars
Permanent premolars & permanent canines
Label what these arrows are pointing to:
Top- cervical ridge
Bottom- cervical constriction
What tooth is being shown in this image?
Primary maxillary central incisor
This incisal view shows what tooth?
Primary maxillary central incisor
This image shows what tooth?
Primary maxillary lateral incisor
This image shows what tooth?
Primary maxillary canine
This image shows what tooth?
Primary mandibular lateral incisor
This image shows what tooth?
Primary Mandibular canine
This image shows what tooth?
Primary Mandibular central incisor
This image shows the occlusal view of what tooth?
Primary maxillary first molar
What tooth is shown in this image-
What view is this image seen from?
Primary maxillary first molar- lingual view
What tooth is this?
What view is this?
Primary maxillary 1st molar
Buccal view
What tooth is this?
What views are these?
Primary maxillary 1st molar
Top- mesial
Bottom- distal
What tooth is this?
What view is this?
What anatomical feature is outlined in green?
Primary maxillary 1st molar
Mesial
Prominent convexity on MB aspect
What tooth is this?
What view is this?
Primary maxillary 1st molar
Occlusal
Label the following anatomical features of the primary maxillary 1st molar:
Mesial & distal triangular fossae
Lime green- central developmental groove
Mint- distal developmental groove
Blue dots- mesial & central developmental pits
What tooth is being shown in the following image
What view
Primary maxillary 2nd molar
Buccal view
What tooth is being shown in the following image?
What view?
Primary maxillary 2nd molar
Lingual
What tooth is being shown in the following image?
What view is this from?
Primary maxillary 2nd molar
Occlusal view
What tooth is being shown in the following image?
What view?
Primary Mandibular 1st molar
Buccal view
What tooth is being shown in the following image
What view
Primary Mandibular 1st molar
Occlusal
What tooth is being shown in the following image?
What view?
Primary Mandibular 1st molar
Lingual view
