1. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 1 PowerPoint ® Presentation for Dental Materials with Labs Module: Laboratory Materials and Techniques: Provisional Materials

2. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 2 Module: Laboratory Materials and Techniques: Provisional Materials Laboratory Materials and Techniques: Provisional Materials Part A: Waxes and Custom Trays Part B: Temporary Crowns

3. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 3 Module: Laboratory Materials and Techniques: Provisional Materials Learning Objectives 1. Define the Key Terms. 2. Identify the different classifications of waxes used in dentistry. 3. Demonstrate the knowledge and skills necessary to fabricate custom trays. 4. Demonstrate the knowledge and skills necessary to construct and fit prefabricated temporary restorations.

4. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 4 Key Terms Reversible hydrocolloid Silicones Sol Study models Syneresis Thermoplastic Undercuts

5. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 5 Part A: Waxes and Custom Trays Articulator –Mounted models –Patient’s occlusion –Hinges and springs Dental waxes –Inlay wax for casting –Replica of tooth –Baseplate wax –Utility wax –Sticky wax –Boxing wax –Undercut wax

6. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 6 Waxes Study Undercut Bite registration ProcessingPattern Wax

7. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 7 Custom Trays Hot Water Bleach Trays Light Cured Spacer Mouth guardsPolymer Undercuts Vacuum FormerMonomer Thermoplastic Material Vacuum Resin Self Curing Acrylic

8. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 8 Part B: Provisional Restorations Temporary crown or bridge Comfort, margin fit, proper contacts, and correct occlusion Aesthetics Stabilize and protect tooth Removed easily

9. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 9 Provisional Restorations Custom acrylic Preformed acrylic Aluminum Composite restoration

10. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 10 Characteristics of Successful Restoration Good proximal contacts Good occlusal contacts Good marginal contours Good food deflection

11. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 11 Assessment Questions What is the purpose of an articulator? To obtain an accurate representation of the patient’s bite What type of wax is used to extend an impression tray? Utility wax What are the two parts of acrylic called? The monomer and polymer

12. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 12 Summary of Module Key Terms Alginate impressions Bite registration Elastomeric impressions Stone and plaster cast models Dental waxes Custom trays Temporary crowns