FP - the core to success Flashcards
when is a core build up indicated?
if tooth or teeth are heavily restored - broken down
how are indirect cores retained?
by posts
what materials can be used for direct cores?
amalgam
composite
GI
RMGI
compomer
metal alloy
what factor must be present for an amalgam core?
mechanical retention
describe the initial strength of an amalgam core?
low initial tensile/ compressive strength
contraindications of amalgam?
pregnancy and breastfeeding
what material is composite?
plastic
what are general retention factors for cores in vital teeth?
undercut prep
dentin pins
adhesive materials
elective endodontics - pulp chamber, posts
list some disadvantages of self threading pins
induce stress
dentinal crazing
fracture resistance of core material reduced
could perforate periodontium
list the technique stages for amalgam bonding
cavity prep
lining placed in deep aspects of cavity
etch enamel 20s and dentin 10s
rinse and dry and achieve good isolation
dentin bonding agent and cure
adhesive resin cement on base and walls of cavity
pack amalgam onto unset cement
how is a good coronal seal achieved after RCT
remove GP from pulp chamber
place GI or RMGI over floor of pulp chamber and openings of root canal
what is a technique used that avoids the use of posts to gain retention? best suited for amaglam,
nayyar core
when would you chose to use a nayyar core?
if roots are too spindly and small
posterior teeth
what type of burs are used to remove GP when placing a post in a tooth?
gates gliddens
what size of gates glidden bur would you normally start with?
size 3
