Dental Materials 1 Question and answers correctly solved 2024/2025
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Course
DENTURES,DX AND TX PLANNING
Institution
DENTURES,DX AND TX PLANNING
Dental Materials 1 Question and answers correctly solved 2024/2025 Dental Materials 1: Final Exam
Dental Cement - correct answer - Few materials in dentistry are used as frequently as dental cements
- No single cement is universally acceptable and fulfills all applications
- The cement chos...
Dental Materials 1: Final Exam
Dental Cement - correct answer ✔- Few materials in dentistry are used as
frequently as dental cements
- No single cement is universally acceptable and fulfills all applications
- The cement chosen should be the right balance between performance and
handling characteristics
Purpose of Cements - correct answer ✔- Retain a restoration or fixed
prosthodontics in the mouth
- Act as a restorative material
Pulpal Protection - correct answer ✔- Cavity varnish-acts as a protective
barrier between tooth and restoration
- Low-strength base/liner-barrier between pulp and restoration when pulp
exposure is suspected
- High-strength base/liner-provides thermal insulation and support for
restorations
- Buildup- acts as a foundation before final restoration is placed on tooth
Mechanical support
Reinforces remaining tooth structure
,Two Categories of Cements - correct answer ✔- Luting Cements:
Achieve retention by filling the interface between the restoration and tooth
- Bonding (or adhesive) Cements:
Stronger than luting cements
Fill the interface and provide micromechanical retention between tooth
substrate and the resin-based cement and restorative materials
Luting, Bonding, Cementation - correct answer ✔- Good wettability
- Thin film thickness
thin enough to flow into a film thickness of 0.25 μm or less.
- Low viscosity
- Uses
Permanent
Temporary
Orthodontic Bands and Brackets - correct answer ✔- Retained for months,
even years
- Cements with fluoride often used
Restorations - correct answer ✔- Permanent-Cements are not often used as
permanent restorations due to low strength
GI is exception
- Temporary, provisional and intermediate-Cements that are mixed to a
secondary consistency to provide an interim restoration
Surgical Dressings - correct answer ✔- Provide protection and support for
the surgical site and help prevent bleeding
,- Mixed to a soft, putty like consistency
- Mechanical retention
- Dispensed
Chemical-cured
Light-cured
Properties of Dental Cements - correct answer ✔- Strength-resistance to
deformation/fracture under applied force
Good compressive strength
Limited tensile strength
Resin cements are strongest
Weakest is zinc oxide eugenol
- Solubility-tendency to dissolve into oral fluids
Most cements dissolve over time in the mouth
Resin cements are closest to insoluble
- Viscosity and film thickness-ability to flow under pressure
- Biocompatibility and anticariogenic (fights cavities)properties- cements must
be safe to use on patients and careful attention to pulpal irritation must be
considered
- Retention and adhesion
Mechanical adhesion- interlocking of one material to another
Chemical adhesion-occurs at the molecular level
- Esthetics- cements come in various shades and opacities
- Radiopacity-cement shows on radiograph
, - Mixing-manufacturers' recommendation
- Working and setting times
- Self-etch and total-etch-to achieve good bonding
- Light-curing, self-curing/dual-curing
- Loading the restoration
Technique
- Removal of excess cement
Must be removed
Consistency
- Cement-associated peri-implant disease
- Cleanup, disinfection, and sterilization
- Considerations during instrumentation
Zinc Oxide Eugenol - correct answer ✔- For temporary and permanent
temporary and permanent cementation
- Brand names-ZOE
- Powder=zinc oxide
- Can be eugenol (calming to the pulp) or non eugenol
- Predetermined ratio of powder to liquid by using the powder scoop; ratio is 1
drop liquid to 1 the powder scoop; ratio is 1 drop liquid to 1 scoop powder
- Can mix on paper pad or glass Can mix on paper pad or glass slab
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