Primary & Mixed dentition Flashcards
Formal term for baby teeth
Primary (decidious) teeth
Dont call them baby, milk teeth cause it denotes lack of importance
What is tooth letters for primary teeth?
A-T
Apple Jacks at K-marT
What is dental formulae for primary teeth?
In each quadrant
I 2/2 C1/1 M2/2
no primary pre-molars!
What is dental formulae for permanent teeth?
In each quadrant
I2/2 C1/1 P2/2 M3/3
What teeth are succedaneous (replace teeth)
- Inciors
- Canines
- Pre-molars
molars are fresh, non-succedaneous
What teeth come in at 6 years old?
Permanent 1st molars!
3,14, 30, 19
“ 6 year old molars”
WHat teeth are normally lost at 5/6 years old?
Primary incisors
From birth to 5 years old what is dentiton?
All primary dentition
* Intact primary teeth
What occurs if you have early loss of primary teeth?
You will have a space for a while because the permanent teeth are not ready to erupt yet.
From 6-13 years old what is dentiton like?
Mixed dentition
Explain the result of pressure and space formation in orthodontic movment.
Pressure= osteoclast bone resobriton
SPace= osteoblast ot build new bone
What does pressure of a permanent tooth erupting below a primary tooth do?
Causes resorbtion of the primary root.
Function of primary dentiton?
- Chewing (mastication)
- Support for lips and cheeks
- Formulation of speech
- Maintain arch space and room for secondary teeth
What is one of the causes of adult tooth crowding
premature primary tooth loss. Nothing to hold space.
How is poor diet and poor oral hygine a consesquence of primary teeth deccay
- dont want to eat because it hurts
- Dont want brush or clean because it hurts
Spots of discoloration on permanent teeth as a result of reperative dentin formation due to decay from primary teeth trasncending down to affect the developimg pernanent tooth.
Turner Spots
Localized issue
What can cause early tooth loss?
- Tooth destruction for dental caries
- Trauma
- Endocrine disorders, immune disorders, etc.
what kind of dental caries is this?
Baby bottle decay!
Delayed tooth loss due to
* Endocrine disorders such as hypothyroidism or hypopituitarism
* Ectodermal dysplasia
* Genetic disorders
* Vitamin D resistant rickets
Delayed Exfoliation
What are some symptoms associated with teething but not only limited too
- Sleep disturbances
- Descrease apetitine
- Loose stool
- Vomiting
does nto always mean tooth eruption
WHat are good reccomended intervention for teething?
- Clean wet washcloth
- Refrigerated teething rings
- Topical anesthetic (caution, 2y/o +)
Cold= numb gums
What are some general traits of primary dention
- Smaller than replacment tooth
- Constriction at CEJ and cervical crown budlges
- Long roots compared to crowns
- Less mineralized
Dentition trat of all primary teeth
- Thinner enamel and dentin
- Whiter
- Fewer anomales
Primary teeth are ____ than those of same name
Smaller
What does this picture display?
Marked cementoenamel junction (CEJ) constriction and cervical crown bulges
- Thinner enamel and dentin layer
- Whiter
- Fewer anomalities
Compare color of permanent teeth and primary teeth
Permanent (ccentrals) are distinctly darker than primarys
Primary anterior teeth have ____ cervical bulges facial and lingually
**prominant cervical buldges*
Primary anterior teeth have what root bend at apex?
Thin where?
Labial root bend at apical 1/3rd
Thin MD
DO Primary anterior teeth have labial depressions, mamelons, or perikymata?
No. None of that.
Primary molars have prominant ____ and exaggeraated ____ on facial
- Prominent mesial cervical ridge (bulges)
- exaggerated cervical line curve apically on facial
Primary molars taper narrowower where?
Narrower toward occlusal table, with narrow table.
Primary molar are wider ____ than ___
Wider MD that OG
Primary molar surface occlusal anatomy is?
Shallow, less grooves and depressions.
Which primary molar is larger?
2nd larger than 1st.
Primary molar roots are?
- Thin and slender
- Diverge farther to make room for underlying PM
- Short root trunk, frucation near crown
On Primary Molars, since the root frucation is near crown due to small root trunk what does this result in?
Caviites can easly pass into the root easily.
Describe trend in Primary insciosr labial view
All crowns are longer incisocervically than MD
*except primary max central (wider MD)
Primary max central incisor is wider ____ than ____ unlike perment incisor or any other primary
Wider MD than IC
Primary incors have roots that are ____ than crowns.
LOnger roots!
Descirbe Primary incsiors from a lingual view
- Prominant lingual cingulum
- MR most prominant on max central
- less anatomy on mand.
Describe primary incisors from proximal view
- WIde Labio-lingually
- CEJ curve greater on mesial
- Root bend facially
- Max incisor roos can ben lingually at cervical half
Describe Primary incisors incisal view
- Max central much wider MD than FL
- Mandibular MD is equal to FL
Describe Primary Canine Labial view
- Max= as wid as long
- Mand longer IC than MD
- Root taper blunt apex
mesial contact of ____ canine crown more cervicalthan distal
Primary Maxillary Canine
*only other is secdonday mand 1sp PM
____ canine have pointed cusps and mesial cusp ridges longer than distal
Primary Max Canine.
* only other is Max 1st PM
____ Canine have quite pointed but like secondary canine: mesial cusp ridges shorter than distal
Mandibular Canine
From a lingual view, whihc primary canines have more prominant cigulum and MR?
Primary Maxillary Canine
Mand= fain and distinct ridges
____have a cervical 3rd even thicker than incisors
Primary Canines
Pronounced labial and lingual cervical bulges with pronounced concave “S” shape on ____ canines
Maxillary Canines
Thicker tooth!
On primary canines where are the cusp tips postioned?
max= labial to root axis
Mand= lingual to root axis
same as secondary teeth
On both Primary molars the CEJ curves more on the ____ and the roots bend ____ on apical 3rd
- CEJ curve more on mesial
- Roots be labial on apical 3rd
which canine is wider mesiodistally than faciolingually
Maxillary canine
canine outlines are diamond shaped from incisal
Mandibular canine
How many roots do the max and mand primary molars have?
- Max= 3 roots
- Mand= 2 roots
Primary molars are ____ MD than the ____ that will replace them
Wider MD than premolars that will replace them.
hold their space
All primary molars have prominant ____ bulges
Prominant buccal buldges
All primary molars taper towards ____ which results in what?
Taper up to the occlusal surface from buccal buldge resulting in a small oclussal table.
All primary molars have a ____ CEJ that curves more apically
Mesial CEJ deeper
Primary vs Permanent Molars 8 traits.
- Bulbous crown.
- Cervical constriction.
- Narrow occlusal table
- Red arrow in figure (b)
- Thin enamel
- High pulp horns (closer to occlusal table)
- Narrow root canals
- Thin pulpal floor (cavity enter roots easily)
- Developing permanent tooth
What primary molars resemble the permanent 1st molars?
Prmary 2nd molars look like permanent 1st molars.
MINI ME
Distal to them once the 6 y/o permanent molars erupt.
Explain Primary Max 2nd molar type traits
- 4 cusps + carabellie
- Oblique ridge (smaller)
- MB cusp is almost equal in size to ML cusp
Explain Primary Mand 2nd molar type traits
- Similar to permanent mandibular 1st molar but smaller
- 5 cusps
- DB cusp widdest, MB and Distal cusp similar size
On primary mandibular 2nd molars which cusp is widest?
Distobuccal cusp is widdest
* MB and D are similar size
this differes from permanet mandibular 1st molar which MB is the widdest
Primary 1st molars are what?
Wannabes
Max 1st primary= resembles max PM
Mand 1st Primary= resemeble no tooth
What tooth?
Crown from occlusal view is similar to maxillary premolar (two prominent cusps = mesiobuccal and mesiolingual) but also very** small distobuccal** and distolingual cusps (as on secondary molars)
Primary Maxillary 1st Molar
Primary Max 1st molar are wider ____ than ____
Wider FL than MD
What does the occlusal table of a primary max 1st molar look like?
Pinched in, similar to PM
What groove patterns to Primary 1st Molar exhibit?
H pattern
Explain traits of primary Mandibular 1st molar
- Ressemble no other tooth
- 4 cusps
- Wider MD than high OC
- Prominant MB cerrical ridge with more apical CEJ on mesial
What primary molar has a prominant mesial transverse ridge and MMR?
Primary Mandibular 1st Molar
What primary molar has a prominant ML cusp and occlsual table wider BL on distal half?
Primary Mand 1st molar
WHat tooth?
Primary Mandibular 1st Molar.
What tooth?
Primary mandibular 1st molar
Whichis primary which is Permanent?
Posterior only
Identify Mixed Dentition
What is unusual about this mouth?
Oclussal plane is lower. Alkylosed tooth.
What is unusual about this mouth?
Tiny retained primary lateral that never fell out.
