Ortho III Flashcards
Stage that determines number of teeth
Initiation stage
Enamel organ give rise to
Enamel
Dental papilla give rise to
Dentin
Pulp
Dental sac or follicle give rise to
Cementum
PDL
Alveolar bone
Joined IEE and OEE forms
Reduced enamel epith
Responsible for root formation shape and number of roots
Hertwig’s epithelial rooth sheath
From cervical loop
Remnants of HERS
Epith rest of Malassez
Responsible for shape and number of apex
Epith diaphragm
Barrier once teeth erupts
Nasmyth’s membrane or primary enamel cuticle
Bone in hand and wrist radiograph
Adults - 27 if not included radius and ulna
29/30 Boards
Puberty - 28
Conditions associated with supernumerary teeth (4)
Gardner’s
Down’s
Cleidocranial dysostosis or dysplasia
Sturge weber syndrome
Most common supernumerary teeth
Mesiodens
Stage of tooth development does supernumerary occur
Initiation stage
Teeth present in radiograph of newly born child
24
20 decid
4 molars
In serial extraction extract ___ first BEFORE _____ erupts
1st PM
C
Ideal space deficiency for serial extraction to happen
> 10mm
8 mm BOARDS
Difference bet MD width of CDE and 345
Leeway space
Leeway space os A. Positive B. Negative C. Zero D. None of the above
Positive
Dentin or enamel deposition during bell stage
Appositional stage
Ave leeway space for max
1.8 mm (0.9mm)
Ave leeway space for md
3.4 (1.7 mm)
Easiest ortho movt
Away from the socket
Extrusion
Most difficult ortho movt
Into the socket
Intrusion
Crown moves in one direction
Tip of root in opposite direction
Most common ortho tooth movt
Tipping
Center of rotation of Incisors
2/3 apicocervically of root
1/3 cervicfacially
Crown moves in one direction while root apex in fix position
Torque
Revolving the tooth around its long axis
Rotation
Present on side toward which the tooth is being moved
Osteoclast
Present on the side of root from which the tooth is moved
Osteoblast
Best force
Faster
Frontal resorption
Light continuous force
Translation aka
Bodily movements
Nolla stage when tooth is clinically seen
Stage 8- 2/3 of root formed
Any decid exo during or after stage 6 can cause ____
Rapid eruption
If decid exo at nolla’s stage 4 or 5 can cause ______
Tooth delay eruption
Nolla stage start of tooth eruption
Stage 6
No peer involvement
Solitary
Observing others to play
On looking
Play activity along side
Parallel play
With interaction
Associative play
Highest form of play
Cooperativd
First bacteria to colonize mouth after birth
Strep salivarius
PH of saliva
6.2 - 7.0 WEAK ACID
Critical pH cause demineralization
5.5 - 5.7
Initial sign of dental caries
White spot lesion or incipient caries
Tooth mineral is affected first when there is active caries (3)
Calcium
Phosphate
Carbonate!
Fluoride in comm water
Fluoridation
Fluoride applied by dentist
Fluoridization
Determine optimal fluoride
Temp
Fluoride that inhibit what enzyme (2)
Phosphatase
Enolase
Site of excretion of fluoride
Kdneys
Optimal fluoride cxn for public water
0.7 to 1.2 ppm
Fluoride converts hydroxyapatite to _____
Fluoroapatite
Toothpaste contains ____ of fluoride
1,100 PPM
Fluoride varnish cxn
5% sodium fluoride
% of SnF that causes discoloration
PH
8%
2.1-2.3
Adult lethal dose of fluoride
Child:____
4-5 g
15 mg/kg
Acidulated phosphate fluoride cxn
pH????
1.23%
3-3.5
Use for fluoride toxicity
Syrup of ipecac
Milk of magnesia MAIN!!!
Cleft palate occurs during _____ week in utero
Cleft lip??
8-10 weeks
5-6 week
Cleft lip repair is delayed up to ____ months after birth
9-18 mos
General BV inflammation with eye ulcerations
Behcet’s syndrome
Open apex aka
Blunderbuss apex
Internal root resorption caused by caoh
Pink tooth of mummery
MTA came from
Portland cement - principal content
Measurements of SOC
1-1.5 incisal
1 labial or prox
0.5 mm lingual
Overall reduction size of SSC
1.5 mm
