Question: Marginal leakage related to temperature change occurs to the greatest extent with_______________?

• 1. Amalgam alloy
• 2. Unfilled resin
• 3. Composite resin
• 4. Direct filling gold

Question: Acrylic resins were first introduced as a denture base material in______________?

• 1. 1925
• 2. 1937
• 3. 1951
• 4. 1956

Question: What is the disadvantage of using composites as restorative material ?

• 1. Increased thermal conductivity
• 2. Decreased wear resistance
• 3. Decreased thermal conductivity
• 4. None of the above

Question: The % of free monomer in a heat – cured acrylic resin is_______________?

• 1. 3% to 5%
• 2. 8% to 10%
• 3. 0.2% to 0.5%
• 4. 0.6% to 0.8%

Question: Inadequate pressure application during flasking_______________?

• 1. Increases vertical dimension
• 2. Causes teeth to be shrunken in investment
• 3. Causes poor quality of colour
• 4. Causes fracture of denture

Question: Inorganic phase of the composites aid in_______________?

• 1. Increasing the mechanical strength
• 2. Decreasing the coefficient of thermal expansion
• 3. Reducing the polymerization shrinkage
• 4. All of the above

Question: About polymerization shrinkage of composite all are true, except______________?

• 1. Polymerization shrinkage is greater if bonded surface area is lesser than unbounded surface area
• 2. Polymerization shrinkage is high if within the enamel margins
• 3. Acid etching and priming will decrease polymerization shrinkage
• 4. Microleakage can occur because of polymerization shrinkage

Question: The advantage of unfilled methyl methacrylate is that______________?

• 1. It can be finished smoothly
• 2. It has a low degree of flow
• 3. It’s non-irritation to pulp
• 4. It’s wear resistant is high

Question: Dentin bonding agents usually contain_____________?

• 1. Only Hydrophobic component
• 2. Only Hydrophilic component
• 3. Hydrophobic and hydrophilic component
• 4. Lyophillic and lyophobic component

Question: Which of the following provide opacity to composite ?

• 1. TEGDMA
• 2. BIS-GMA
• 3. Ti02
• 4. None of the above