Location of PEDO mandibular foramen?
closer to occlusal plane (7mm above), more distal, overall mandible is less developed = higher success of IA nerve block.
Max PEDO dose of LA?
2 mg/lb (300 mg max)
Class II amalgams are retained with?
dove tails
Extension for prevention are used only with ___ restorations
amalgams (not composites)
Class II preps are less than ideal and deep due to ___
cervical constriction
PEDO SSC do not require a ledge in the prep, why?
- The ledge will prevent seating of the crown all the way.
- We want the margin to be at or below the gingival margin.
- SSC require 1-1.5 mm Occlusal (sometimes B-L to remove bulge) reduction.
Primary tooth dentin is ___ that of adult
1/2
Class II preps in PEDO teeth do not need what?
Gingival bevel bc the enamel rods converge occlusal.
There must be __ % of demineralization in teeth to be seen radiographically
30-60%
Remember: Primary Teeth have more organic content than adult teeth
Compomer vs Hybrid vs resin modified GI
- GI is a weak material.
- Hybrid is stronger than GI, and gives more Fl than compomer
- Compomer is more like composite, thus is the strongest, but doesn’t release as much Fl and is considered the least caries resistant.
formecresol dilution for pulpotomies
20%
Risk of using CaOH in direct pulp cap?
pulp irritation. Thus, do pulpotomies. Only to DPC if tooth will exfoliate in 6 months.
Pulpotomy procedure:
vital tooth, asymptomatic, healthy pulp!
- hemostasis of pulp with formecresol and a cotton pellet for 5 minutes
- Obturate/fill pulp chamber with ZOE
Most ankylosed primary tooth (over-retained)
Mand 1M
Tx if accidentally EXT a permanent tooth bud
replant ASAP with pressure and sutures
A PANO is recommended at what age?
6 y/o
Enamel thickness of primary vs permanent molars
Primary = 1 mm Permanent = 2.5 mm
Primary teeth characteristics:
- more M cervical ridge (tell L from R)
- longer, slender roots
- Roots are Narrow MD, Broad Bucally-lingually
- little to no root trunk
- v. divergent roots and less curved
- less anatomy (shorter cusps, grooves, pits)
- cementum is thinner
- ST is flabbier, more red, more rolled FGM, PDL fibers run in parallel to the teeth
- bone has fewer trabeculation, more BM and has a flatter crest
- Thin lamina dura and larger pockets
- not as wide attached gingiva (due to labial eruption)
Leeway space
- primary canine to 2M and permanent canine to 2PM
- Max anterior primary teeth are 75% the size of their permanent teeth
- Mand anterior primary teeth are 6mm narrower MD than their permanent teeth
- Primary molars are wider MD
- Maxilla 1.5 mm per quadrant.
- Mandible 2.5 mm per quadrant
Primate space
MAX primary lateral incisor and primary canine
MAND primary canine and primary 1M
most common missing permanent teeth:
3M > Mand 2PM > Max LI > Max 2PM
Most common primary missing: Max LI
remove ankylosed teeth via
sectioning the tooth
Space maintainer for:
Adult 1M is lost before the eruption of adult 2M
nothing. 2M will medially drift into 1M space.
NOTE: no space maintainer is needed if adult tooth will erupt soon (look at radiographs for root development)
Space maintainer for:
Primary 2M is lost
- Always use a space maintainer until Adult 2PM arrives.
- The most rapid loss of AP spread is due to mesially tipped/rotated adult 1M after early removal of primary 2M.
