Materials for Luting and Adhesion Flashcards Preview

Dental Materials Supplemental Cards > Materials for Luting and Adhesion > Flashcards

Flashcards in Materials for Luting and Adhesion Deck (37)
Loading flashcards...
1
Q

what are the main objectives of cementation?

A
  • help maintain restoration in place
  • maintain integrity of remaining tooth structure
2
Q

retention via cementation is achieved by what?

A
  • friction
  • adhesive joint
  • the cement and/or the restoration
3
Q

an effective interfacial seal depends on the ability of the cement to do what?

A

fill the irregulatirites between the tooth and the restoration and to resist the oral environtment over the short and long term

4
Q

why is it important for there to be a strong bond between the luting agent and the dental substrates?

A

it can prevent infiltraiton of bacteria and fluids that can cause caries and sensitivity to the patient

5
Q

what are some common substrates that cement can be used to bond?

A
  • cast alloys
  • ceramics
  • indirect composites
  • amalgam
  • fiber posts
  • repair of composite, ceramic, and ceramic-metal restorations
6
Q

how are luting agents classified?

A
  • according to the length of time that they are expected to stay in function:
    • provisional and definitive
  • ​and also according to setting:
    • acid based reaction and setting by polymerization
7
Q

name 4 materials that are capable of creating a chemical interaction with hydroxyapatite

A
  • zinc polycarboxylate
  • GI
  • RMG
  • self-adhesive resin cements
8
Q

describe minimally invasive dentistry

A
  • preservation of a healthy set of natural teeth for each patient should be the objective of every dentist
  • all work in the health field is aimed basically at conservation of the human body and its function
9
Q

what are 3 important considerations when choosing adhesives?

A
  • dentin morphology and physiology
  • adhesive systems
  • adhesive dentsitry - case reports
10
Q

describe buonocore 1955

A
  • found that acid etching of the enamel increases the bond strength of resin to enamel
  • the practice of bonding to enamel has become a routine procedure in many fields of dentistry
11
Q

approximately half of all restorations placed in general dental practices are done to replace a defective or failed restoration. what are the 3 main categories that reasons for restoration replacement can be divided?

A
  • clinician factors
  • material properties
  • patient factors
12
Q

what is the composition of dentin?

A
  • 50% mineralized apatite crystals
  • 20% water
  • 30% organic matrix (collagen fibrils)
13
Q

describe the variation of water content from superficial to deep dentin

A
  • diameter and number of tubules increases near the pulp
  • 20,000 tubules/mm^2 at DEJ
  • 45,000 tubules/mm^2 close to pulp
14
Q

describe sclerotic and caries-affected dentin

A
  • hypermineralized
  • tubules occluded with CaPO4 crystals
  • acid-resistant
15
Q

what is an issue with over-drying dentin?

A

collagen fibers are susceptible to collapse upon over-drying

16
Q

describe the “overwet” phenomenon

A
17
Q

describe the smear layer of dentin

A
  • 0.5-2.0 micrometers thick
  • cannot be removed with rinsing
  • composed of:
    • bacteria
    • saliva
    • blood cells
    • denatured collagen
18
Q

describe the hybrid layer

A

the structure formed in hard dental tissues by demineralization of the surface and subsurface, followed by infiltration of monomers and subsequent polymerization

19
Q

what is the composition of primer?

A
  • hydrophilic monomer (HEMA)
  • water-soluble solvent
    • water
    • acetone
    • ethanol
  • creates the correct conditions for adhesive to create micromechanical retention
20
Q

what is the composition of adhesive?

A

unfilled or lightly filled resin (Bis-GMA)

21
Q

what are the 3 adhesive categories?

A
  • conditioner (etchant)
  • primer
  • adhesive
  • there are also combined primers and adhesives, and self-etching primers (aka combined conditioner and primer)
22
Q

describe the 4th, 5th, and 6th generation adhesive systems

A
  • 4th generation
    • conditioner, primer, and adhesive are all in separate bottles
    • phosphoric acid
    • more steps, slightly more predictable
  • 5th generation
    • conditioner in separate bottle
    • primer and adhesive are combined
    • phosphoric acid
    • less steps, less predictable, more susceptible to differences in wetness
  • 6th generation
    • conditioner and primer are combined
    • adhesive in separate bottle
    • no phosphoric acid
    • solvent is always water
23
Q

describe self-etching adhesives

A
  • significant difference in technique
  • user-friendly - no more phosphoric acid etching
  • acidic monomer dissolves smear layer and primes dentin simultaneously
  • one-step or two-step systems
24
Q

describe the research conducted on self-etching adhesives

A
  • higher bond strengths in deep dentin than 4th and 5th generation adhesives
  • bonds well to cut enamel, but not as well to uncut enamel
  • resin tag formation not as pronounced, doesn’t seem to affect bond strength
  • two-step self-etching adhesives more predictable than one-step products
25
Q

describe the 7th generation adhesive

A
  • dissolves smear layer, self-etching primer, and adhesive all in one bottle
26
Q

what is scotchbond multipurpose plus?

A
  • 4th generation 2-step adhesive
  • ethanol, water; unfilled
27
Q

what is all-bond 2?

A
  • 4th generation or 2-step adhesive
  • acetone, ethanol; unfilled
28
Q

what is optibond/optibond FL?

A
  • 4th generation or 2-step adhesive
  • ethanol/water; filled
29
Q

what is prime and bond NT and NT dual care?

A
  • 5th generation or 1-step adhesive
  • acetone, ethanol; filled
30
Q

what is optibond solo plus?

A
  • 5th generation 1-step adhesive
  • ethanol; filled
31
Q

what is single bond plus?

A
  • 5th generation 1-step adhesive
  • ethanol & water; unfilled
32
Q

what is clearfil SE bond?

A
  • 6th generation self-etching adhesives
  • water; 10% filled; light-cured
33
Q

what is adper prompt L-pop?

A
  • 6th generation self-etching adhesive
  • water; 2% filled; light-cured
34
Q

what is clearfil liner bond 2V?

A
  • 6th generation self-etching adhesives
  • water; 10% filled; dual-cured
35
Q

what is one-up bond F plus?

A
  • 6th generation self-etching adhesive
  • water; 10% filled; light-cured
36
Q

do etch-and-rinse and self-etching use phosphoric acid?

A
  • etch-and-rinse: yes
  • self-etching: no
37
Q
A