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

Laboratory Materials and Techniques: Alginate Impression Material Module: Laboratory Materials and Techniques: Alginate Impression Material Laboratory Materials and Techniques: Alginate Impression Material Part A: Alginate Impression Material Part B: Bite Registration Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Module: Laboratory Materials and Techniques: Alginate Impression Material Learning Objectives 1. Define the Key Terms. 2. Identify materials used in the dental lab and perform associated procedures. 3. Demonstrate the knowledge and skills necessary to prepare, take, and remove alginate impressions and wax bites. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Key Terms Accelerates Articulator Calcination Catalyst Distortion Exothermic Gel Gypsum Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Part A: Alginate Impression Material Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Alginate Economical Rapid setting Powder/water ratio Accurate Sol Bowls Syneresis Gel Spatulas Imbibition Setting time Trays Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Impression Set-up Alginate material Mixing bowl Spatula Water-measuring device Trays Wax Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Taking the Impression Try tray in patient’s mouth Mix material Remove excess material Place gently in patient’s mouth Hold until set Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Taking the Impression Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Removing the Impression Ensure material is set Carefully rock tray back and forth Keep fingers steady to protect teeth Give patient wet paper towel for face Check impression for landmarks Rinse impression Disinfect impression Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Part B: Bite Registration Wax Polysiloxane Relationship of maxillary to mandibular arch Accurate occlusal relationship Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Assessment Questions Is alginate material is a Reversible Hydrocolloid? It is irreversible. Is the term for when an alginate impression loses water is known as syneresis? Yes. Is the alginate tray should be tried in the patient’s mouth before mixing and loading the material? The tray should be tried in empty. Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.

Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED. Summary of Module Key Terms Alginate impression material Bite registration Copyright © 2006 Thomson Delmar Learning. ALL RIGHTS RESERVED.