When selection the colour of cement to use for cementing a porcelain jacket crown, the powder being tested is best mixed with______________?

Related Mcqs:

1. For porcelain fused to metal crown, the porcelain should have ______________?

   A. High fusion expansion
   B. High fusion temperature
   C. Linear coefficient of thermal expansion less than that of metal
   D. Linear coefficient of thermal expansion more than that of metal

2. Porcelain binds to metal in PFM crown by_________________?

   A. Metallic bind
   B. Transparency
   C. Chemical bond
   D. B and C

3. Increased amount of powder in zinc phosphate cement mixture will cause_______________?

   A. Decreased strength
   B. Decreased film thickness
   C. Decreased solubility
   D. Increased setting time

4. In which of the following disorders a circulating antibody directed to intercellular cementing substance of stratified squamous epithelium is observed:_________?

   A. Lichen planus
   B. Verrucous vulgaris
   C. Bullous pemphigoid
   D. Pemphigus vulgari

5. Which of the following is common to both zinc eugenol cement and polycarboxylate cement?

   A. Polyacrylic acid is liquid
   B. Chemical bond to tooth structure
   C. Chelation
   D. Substitution o eugenol by EBA to increase strength of cement

6. The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________?

   A. Impaction
   B. Gingivitis
   C. Occlusal wear
   D. Gingival recession

7. Porosity in porcelain at condensation stage depends on_________________?

   A. Shape and size of particle
   B. Uniform distribution of particle size
   C. Number of particles
   D. None of the above

8. The first porcelain tooth material was introduced by______________?

   A. DeChemant
   B. Ash
   C. Plateau
   D. McClean

9. Chemical method of strengthening porcelain involves_________________?

   A. Exchange of aluminium and sodium ions
   B. Exchange of aluminium and potassium ions
   C. Exchange of sodium and potassium ions
   D. None of the above

10. Condensation shrinkage of porcelain during firing depends on__________________?

    A. Rate of arriving at firing temperature
    B. Uniformity of particle size
    C. Shape and size of particle
    D. Type of investment used