To promote the retention of direct and/or indirect restorations in teeth with extensive coronal destruction
posts
posts are prone to root _____ fracture
vertical
long posts have _____ retention
higher
what kind of post?
Small resistance to
displacement and stress
generated by oclusal forces
Higher risk of fractures
short
ideal length of post
C with at least ___ mm but ideal is ____ ≥ mm
3mm ; 5mm
for post length,
E must have at least ____ F length
1/2
Increases stress concentration inside the root
Increases the risk of lateral perforations
Wedge effect
ideal diameter of the post is ___ of the total root width
1/3
for the ideal diameter of a post, you want at least ___ mm of remaining dentin
1mm
These are part of what endo smear layer?
Inorganic dentin matrix (coronal portion)
Organic matrix
- fragments of odontoblastics processes
- microorganisms
- necrotic material
Primary
These are part of what endo smear layer?
Remnants of endodontic cement
Remnants of gutapercha
secondary
What kind of post?
Benefits:
Retention
Narrow diameter
Root dentin preservation
Fracture prevention
Higher resilience
ME = 40 Gpa
Fiberglass post
what curing process?
initiate the polymerization reaction by generating free radicals
dual-double curing process
what is this a benefit of?
Polymerization guarantee
dual-double curing process
What is this a disadvantage of?
Polymerization competition
dual-double curing process
What kind of resin cement?
Multicomponent adhesive systems that include acid,
primer, and adhesive for luting procedure
conventions dual resin cement
What kind of resin cement?
It may or not require the use of a self-etch adhesive
system to enhance bond strength
SELF-ETCHING DUAL RESIN CEMENT
What kind of resin cement?
Does not require surface conditioning.
Acidic monomers demineralize the dentin.
Micromechanical and chemical bonding
Chemical bonds: van der Waals forces + hydrogen bonds.
Limited penetration: no hybrid layer formation
High viscosity (less flow and surface penetration
self-etching dual resin cement
Gattes-Glidden Drills (alternate with irrigation) for ?
gutta-percha removal
Largo Drills (alternate with irrigation) for ?
post space preparation
the moment of fiber post cutting may affect the ______ of root canal posts when a regular resin cement is used
retention
Which cement has remarkable superiority of adhesion?
conventional resin cement adhesion or self-
adhesive cement?
conventional resin cement adhesion
for anatomized posts: the adhesive interface between the post and the composite resin is the _____
weakest