Power Point Presentation for Dental Materials with Labs

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

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

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. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 3

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 5

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

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

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

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

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

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 Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. 11

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