Denture Base Materials: Classification and Techniques for Handling Resins

Denture Resins And Polymers

 

Manipulation of Each Type of Resin:

• Manipulation of Heat-cure Resin:
  • Mix the correct proportion of polymer and monomer, i.e. polymer/monomer ratio is 3 to 3.5/1 by volume or 2.5:1 by weight.
  • First, the liquid monomer is poured in a thick, clean glass jar and then powder is added slowly to it.
  • After all powder is added the mix is stirred and vibrated thoroughly so that mechanically mixed pigments and dyes are dispensed evenly throughout the material.

“Importance Of Proper Handling Techniques For Denture Resins”

• • On completion of stirring, a light lid must be placed on the glass jar to prevent evaporation of the monomer.
  • When polymer and monomer mix is allowed to stand in a closed container it undergoes physical changes due to the interaction of monomer to polymer.

“Best Ways To Understand Denture Base Resin Classification”

“Risk Factors For Failure Of Denture Base Materials”

• Manipulation of Chemically Activated Resin:
  • The most commonly used techniques for the manipulation of self-cure resin is the sprinkle-on technique and hand-adapted dough method.
  • Sprinkle-on technique: In this technique, both polymer and monomer are added to the cast which consists of separating medium.

“Early Signs Of Problems With Denture Base Resins”

• • In this powder is added to the cast and monomer is added to it till the proper thickness is achieved.
  • The liquid is added to the powder with the help of a dropper.
  • Hand-adapted dough technique: In this technique, both the powder and liquid are proportionate and mixed in a porcelain jar.
  • As the mix proceeds to dough stage, it is placed in between two glass slabs, now it is removed and is adapted to the cast manually in the desired shape.

“Difference Between Acrylic And Thermoplastic Denture Resins”

• Manipulation of Light Activated Resin:
  • Fabrication of denture base:
    • As base material is in the plastic stage, it should be adapted on the master cast.
    • Polymerize it to hard set in the light chamber without teeth to be used as a base plate.

“Role Of Polymerization In Denture Base Material Handling”

• • Completion of denture:
    • Attach the teeth to base plate by additional material and the anatomy of the polished surface should be made accordingly.
    • As sculpting is complete denture should be placed again in a light chamber for polymerization.
    • As polymerization is over dentures should be finished and polished.