MDS PREP
What is the primary advantage of using resin cements over other types of cements?
1) Higher compressive strength
2) Improved adhesion to the tooth structure
3) Lower film thickness requirement
4) Faster setting time
Resin cements are known for their excellent adhesion, providing a strong bond to tooth structure and restorative materials.
What is the primary function of a luting agent in the context of dental restorations?
1) To bond the restoration to the tooth
2) To provide a protective barrier against bacteria
3) To insulate the tooth from thermal changes
4) To fill in gaps caused by tooth decay
A luting agent's primary function is to bond the restoration to the tooth and enhance its retention.
What is the gelation temperature range of a reversible hydrocolloid?
1) 37°C - 50°C
2) 50°C - 70°C
3) 70°C - 100°C
4) 100°C - 120°C
The gelation temperature is the point at which the material transforms from a sol to a gel, which is critical for impression making.
What is the chemical structure of Giomers?
1) They contain fluoraluminosilicate glass and silica-filled urethane resin.
2) They are purely organic ceramic-filled polymers.
3) They are a combination of glass ionomer and resin-modified glass ionomer.
4) They have a matrix of polyacrylic acid and ceramic filler particles.
Giomers are a combination of fluoraluminosilicate glass and silica-filled urethane resin. This unique composition allows for the release of fluoride and improved physical properties compared to traditional composites.
What are the common types of water-based dental cements?
1) Zinc polycarboxylate
2) Calcium sulfate
3) Zinc oxide-eugenol
4) All of the above
Water-based cements include zinc polycarboxylate and calcium sulfate.
What is the recommended force for condensing a composite resin using a 0.5 mm diameter condenser nib?
1) 3.75 pounds
2) 8.43 pounds
3) 15 pounds
4) 0.04-0.4 µm
The recommended force for condensing a composite resin using a 0.5 mm diameter condenser nib is 3.75 pounds. This force is considered optimal and is well within the physiologic limits of the tooth.
What does ORMOCER stand for in dental materials?
1) Organically Modified Resin Monomer Ceramic
2) Organically Modified Resin Matrix Composite
3) Organically Modified Ceramic Resin
4) Ormocer is not an acronym.
ORMOCER stands for Organically Modified Ceramic, which is a type of advanced filling material that combines the properties of ceramics and resins for superior performance in dental restorations.
What is the water sorption value of poly (methyl methacrylate) according to the provided information?
1) 0.69 mg/cm²
2) 0.85 mg/cm²
3) 1.05 mg/cm²
4) There is no information provided on water sorption value
The text states that poly (methyl methacrylate) has a water sorption value of 0.69 mg/cm², which affects its dimensional stability and physical properties.