1 / 16

DENT 1210 Dental Materials II

DENT 1210 Dental Materials II. Lesson 5 Elastomeric Impression Materials. The 3 types of elastomerics. 1. Polysulfide (Permlastic, CoeFlex) 2. Silicone condensation silicone- Polysiloxane (Examix, Cutersil)

adanne
Download Presentation

DENT 1210 Dental Materials II

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DENT 1210 Dental Materials II Lesson 5 Elastomeric Impression Materials

  2. The 3 types of elastomerics • 1. Polysulfide (Permlastic, CoeFlex) • 2. Silicone condensation silicone- Polysiloxane (Examix, Cutersil) addition silicone- Polyvinylsiloxane (Extrude, Express) • 3. Polyether (Impregum, Permadyne)

  3. 2. 4 Viscosities • Putty • Heavy Body • Regular Body • Syringe or Injection

  4. Viscosity

  5. 3. Uses • Used whenever accuracy is essential. Final impressions for removable and fixed prosthesis, including implants.

  6. 4. Advantages& Disavantages • Polysulfide- smelly, hard to mix, little tear • Polysiloxane- ease of use, tear easily • Polyvinylsiloxane- not use with latex gloves • Polyether- does not need pour up soon, stiffer to remove from mouth

  7. Base- Mercaptan Accelerator or Catalyst- lead dioxide and sulfer Permlastic 6. Ingredients of Polysulfide

  8. Ingredients in polysiloxane • Base- methylsiloxane and silica • Catalyst- tin octoate

  9. 6. Ingredients in Polyvinylsiloxane Base- polyvinylsiloxane Catalyst- platinum salt

  10. Impression PVS

  11. Base-polyether Catalyst- alky aromatic sulfonate Ingredients in Polyether

  12. 7. Mix • If 2 pastes- coat spatula with catalyst first • Cartridges self mix in tips on gun (extruder) • Putty- knead by hand

  13. 8. Mix is set • Mix complete when material is one color with no streaks and becomes stiff • Material is set when elastic. (Polysulfide- about 7-10 minutes!)

  14. 8. Impression Trays • Custom- paint with adhesive • Triple • Kwik

  15. Dowel Pin A dowel pin is used when pouring a model to make a Removable Die VOCAB

  16. The End

More Related