High Yield Dental Materials Points FCPS Part 1


Dental Material is the subject of too much impotence. Almost 20 to 25 MCQs come from this subject in the exam of FCPS Part 1. For the prep of FCPS Part 1 you have to cover three aspects, 1: Texts, 2: MCQs and 3: Important points. With out important Points it will be difficult in exam to solve MCQs. All candidates should cover all these important Points. We have made important Points for the Subject of Dental Materials to make your preparation easy and up to the mark. It will definitely help you people in the exam of FCPS Part 1 Dentistry.


The melting range of Gold Casting alloys = 900*c

    1. The melting Range of Co-Cr alloys = 1350*c
    2. Investment used for casting conventional Gold Alloys = Gypsum-bonded Investment
    3. Investment used for Base metal Alloys = Type 1 Phosphate bonded investment
    4. Investment used for Remove-able partial Denture Framework = Type 2 Phosphate bonded investment
    5. Type of Gold for all metal Crowns and Bridges = Type lll
    6. Strain Hardening = will cause decrease in Ductility and Resistance to corrosion
    7. Fritting: = The process of production of Low and Medium Fusing Porcelain
    8. Material of choice to produce Diagnostic Casts = Alginate
    9. Ideal material for Master Cast = Type 4 Dental Stone
    10. Fluxes = dissolves surface oxides
    11. Potassium Flouride = in Fluxes dissolve Chromium Oxide film
    12. Oxides and Sulfides = are the Corrosion Products
    13. The most common Anti-Flux is = Graphite
    14. To greatly extend the working time of Zinc Phosphate Cements =  “Frozen Slab” technique is used
    15. GIC = has superior Mechanical Properties than Zinc Phosphate and Zinc Poly-carboxylate Cements

  1. GIC = has more retention than Zinc Phosphate and Zinc Polycarboxylate
  2. Type 1 Gold Alloys are used for = small Inlays
  3. Type 2 Gold Alloys are used for = Larger Inlays and Onlays
  4. Type 3 Gold Alloys are used for = Crown n Bridges
  5. Type 4 Gold Alloys are used for = Remove-able Partial Denture
  6. Sprue should attach to the Wax pattern at an angle of = 45 *
  7. Nickle in Base metal Alloys is responsible = Ductility
  8. Chromium is for = Passivating Film
  9. Cobalt = increases Rigidity of Alloy
  10. Increase Water to Powder Ratio of Gypsum causes = less expansion
  11. Rapid Spatulation of Gypsum results in = Acceleration of setting time
  12. 28% NaCl act as = accelerator of Gypsum 
  13. Borax and Sodium Citrate act as = retarder of Gypsum
  14. Dental Plaster has = Beta Hemihydrate
  15. Dental Stone has = Alpha Hemihydrate
  16. Beta Hemihydrate is also known as = Plaster of Paris
  17. Vibrator is used after mixing of Dental Stone and Plaster to eliminate = Air Bubbles
  18. Gypsum Products = are weaker in Tensile Strength than Compressive Strength
  19. Gypsum products are produced by the process of = Calcination
  20. Alginate shows the Phenomenon of Synersis by giving up = Water
  21. Alginate shows the Phenomenon of Imbibition by gaining = Water
  22. Polyether Impression Materials = are the most rigid and difficult to remove from the Mouth
  23. Polyether Impression Materials = are unstable in the presence of Moisture
  24. Polyether Impression Materials = also shows the Phenomenon of Imbibition
  25. Condensation Sillicons = need 20 to 30 Minutes wait before pouring of models due to stress relaxation to occur


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