E3: LUTING AGENTS! Flashcards
Solid + Solid = _____ Adhesion, Liquid + Solid = ______ Adhesion
POOR….Good
What are the 3 mechanisms of adhesion?
Mechanical, Physical, and Chemical
Whats the simplest type of adhesion?
Mechanical
Mechanical adhesion is _______ of surface irregularities.
interlocking
Physical adhesion occurs when two surfaces are in _____ proximity.
close
Physical adhesion is from dipole-dipole forces and is rapid, reversible, and not suitable for ________ bond
permanent
Chemical adhesion: Molecules dissociate after adsorption onto the surface and constituent components then bond themselves separately by _____ or _____ forces
covalent or ionic
Chemical Adhesion: _________ between the two atoms in the chemical bond distinguishes it from PHYSICAL adhesion
sharing of electrons
An intermediary substance that is able to bond to BOTH materials involved:
Coupling Agent
Whats and example of a coupling agent?
Silane
________: Modifies the characteristics of the surface of one of the two materials involved so a bond can be created
Primer
Whats an example of a PRIMER?
Rely-X Ceramic Primer
A material that fills the gap between the tooth and the indirect restoration and holds them together:
Luting agent
The period of time, measured from the START of MIXING, during which it is possible to manipulate a dental material without an adverse effect on its properties.
Working Time
That part of the WORKING time specified or required in order to obtain a satisfactory MIX of the components of the dental material.
Mixing Time
The period of time, measured from the START of MIXING until the cement has SET, according to criteria and conditions prescribed for each particular material.
Setting Time
________: Used for the period of time between the preparation and seating the definitive
restoration – to seal, preventing marginal leakage → preventing pulpal irritation
Provisional Cements
What are two classes of Provisional cement?
1.Zinc Oxide Based, self cure 2.Resin based, dual cure
What are 2 examples of zinc oxide based provisional cement?
Tempbond, Tempbond NE
What are 2 examples of Resin based, dual cure provisional cement?
Tempbond clear, provilink
Tempbond/Tempond NE: Paste\Paste: _____ and _____…Setting time _______
base and catalyst….3-4mins
Residual ________ may inhibit the polymerization of resin materials
eugenol
Eugenol provides a “______” effect on the pulp
sedative
________-an agent that has the property to diminish the perception of pain and/or touch
OB-TUN-DENT
What do you use on the outside of the provisional for easy cleanup after cementing?
vasaline
What can you use to accelerate temp bond (provisional cement)?
water!
What are the 4 Matrix types of PERMANENT cements? Which matrix is NOT an acid/base reaction?
1.Phosphate 2.Phenolate 3.Polyacrylate 4. Resin**only one NOT an acid/base reaction
Whats the OLDest cement being used? What is the acid matrix?
Zinc Phosphate…phosphoric acid
Does Zinc Phosphate bond to the tooth?
NO, just fills the space
Polycarboxylate Cement uses _______ acid as its acid matrix.
PolyAcrylic Acid
Advantave of Polyacrylic Acid: Large ______ of polyacrylic acid, can’t penetrate dentin tubules
molecular size
Is polycarboxylate cement more or less soluble?
more soluble…a disadvantage
Whats more difficult to remove, polycarboxylate cement or zinc phosphate?
polycarboxlate is harder to remove
What material is not recommended as a permanent luting agent, but is a good provisional cement?
Polycarboxlate
What material: Essential tooth is isolated and undisturbed for the entire setting time, sensitive early moisture contamination (5+ minutes)
Glass Ionomer
What is the film thickness of GI?
less than 25 microns
Advantages of GI: Wide range of desirable properties including: strength, ______ release, low solubility, translucency, radiopacity, low film thickness, good seating, and substantially decrease micro leakage: Adheres to _____ and _____…Has an inhibitory effect on growth and adherence cariogenic oral ______
fluoride release, enamel and dentin, BACTERIA
Wow resin modified GI can be much thinner:
3-25 microns
What are the three RESIN CEMENTS we discussed and what type of cure is used for each??
1.Nexus-Dual cure 2.Rely X-VC: light cure 3.Panavia 21-self cure
Resin cements MUST BE USED WITH a ______ system!!
BONDING
Which cement is VERY TECHNIQUE SENSATIVE?
RESIN CEMENTS
Which cure type of Resin cement has the thinnest application? The other two are basically the same at:
Light cure-thinnest 5-22 microns….dual and self 15-50 microns
With LIGHT CURE resin cements you must use a _____ FREE restoration/splint.
METAL (can’t get light under that shit!)
Which cure type of Resin cement can you use with metal restorations?
self cure (Panavia 21)
