MDS PREP
What is the significance of the direction of the applied force during condensation?
1) It is not important for the success of the restoration.
2) It affects the marginal integrity of the restoration.
3) It influences the adaptation of the material to the cavity walls.
4) It does not affect the physical properties of the restoration.
The significance of the direction of the applied force during condensation is that it affects the marginal integrity and adaptation of the material to the cavity walls. It is important to direct the force at an appropriate angle to ensure proper condensation and seating of the material.
What is the typical mixing ratio for zinc polycarboxylate cement?
1) 1:1
2) 1:2
3) 2:1
4) 3:1
The typical mixing ratio for zinc polycarboxylate cement is 1:2 (powder to liquid).
Gypsum Bonded Investment should NOT be heated above
1) 700°C
2) 750°C
3) 800°C
4) 900°C
Dental Materials Answer: 1
What is the composition of Cermet Cement?
1) Glass and polyacrylic acid
2) Glass metal powder and polyacrylic acid
3) Zinc oxide and eugenol
4) Calcium hydroxide and polyacrylic acid
Cermet Cement is composed of glass metal powder that is sintered to polyacrylic acid to form a high-density material.
What is the ideal consistency of a luting agent according to ANSI/ADA Specification No. 96 (ISO 9917)?
1) Thixotropic
2) Plastic
3) Thin film
4) Putty
The ideal luting agent consistency is not explicitly mentioned in the text, but it should be able to flow into a film less than 25 µm thick without fragmentation.
What is the typical force applied during the condensation of a 0.5 mm diameter condenser nib?
1) 0.04-0.4 µm
2) 1-5 µm
3) 3.75 pounds
4) 8.43 pounds
The recommended force for condensing a composite resin using a 0.5 mm diameter condenser nib is 3.75 pounds. This is the force that is well within the physiologic limits of the tooth and provides effective condensation.
How do resin teeth typically bond with denture base resins?
1) Through mechanical undercuts.
2) Through silanization.
3) By forming chemical bonds.
4) Both A and B.
Resin teeth are capable of forming chemical bonds with commonly used denture base resins, which allows for a stronger and more durable bond compared to porcelain teeth.
What is the maximum allowable level of mercury in the blood?
1) 0.5 µg/L
2) 3 µg/L
3) 5 µg/L
4) 10 µg/L
The maximum allowable level of mercury in the blood is 3 µg/L according to the given text.