Category:

Crown and Bridge Updated

Course Outline

This course will evaluate the various types of porcelain crowns available and bring you up to date on the current methods of cutting a preparation and taking impressions using the new material in use today. The most spectacular changes are in the materials. We no longer need to take a full mouth impression to establish the bite. This is done automatically when the impression is taken. Our impression material is more accurate and flows into the margins easier giving us a more accurate impression.

Even more impressive is the need for the doctor to take his own impressions or make his own temporaries. Both of these functions are now given to the new RDAEF (Register Dental Assistant Extended Functions). The doctor still needs to cut the preparation, but once this is done, the RDAEF can pack the cord, take the impression, and place the temporary.

I feel it is still important for the doctor to check the bite to be sure the temporary is not high. Otherwise, he may find himself coming back to the office to adjust the bite at some inconvenient hour.

Learning Objectives

After completing this course you’ll be able to:

  1. Describe the three types of margins.
  2. Describe the preparation required for placing a margin on a root canaled tooth.
  3. Discuss possible problems when placing a margin on a root canaled tooth.
  4. Describe the procedure for preparing a maxillary molar.
  5. Describe mandibular bicuspid preparation.
  6. Discuss preparation for mandibular incisors.
  7. Describe possible problems of mandibular cuspid preparation.
  8. Describe maxillary incisor preparation.
  9. Discuss the beveled margin.
  10. Define crown lengthening.
  11. Describe the process of build up.
  12. Describe the five ways to remove a crown.
  13. Describe the impression technique for an acrylic temporary crown.
  14. Discuss the use of impression trays.
  15. Compare the three types of temporary crowns.
  16. List advantages and disadvantages of stainless-steel crowns.
  17. Discuss areas of concern for stainless-steel crown preparation.
  18. Describe how to remove a temporary crown.
  19. Compare underoccluding and overoccluding.
  20. Discuss cementing and seating a crown.
  21. Describe the luting technique.
  22. Discuss post-operative observations after seating a crown.
  23. Compare the Captek Crowns and IPS Empress.
  24. List the advantages and disadvantages of the CAD/CAM system.
  25. List the advantages and disadvanges of the office digital scanner.
  26. Compare the Lava crown and Procera All Ceram crown.

Table of Contents

Full Crown
Types of Margins
Shoulderless (Feather Edge) Margin
Porcelain Margin
The Bevel Porcelain Margin
Posterior Mandibular Molar Full-Crown
Burs
The Root Canaled Tooth
Procedure
Preparation
Analyze the Preparation
Tips
Possible Problems
Maxillary Molar Preparation
Burs
Procedure
Possible Problems
Mandibular Bicuspid Preparation
Burs
Possible Problems
Mandibular Incisors Preparation
Burs
Possible Problems
Mandibular Cuspid Preparation
Burs
Possible Problems
Maxillary Incisors Preparation
Burs
Possible Problems
The Beveled Margin (Lava Crown)
Burs
Crown Lengthening
Block Out vs. Buildup
Bite Registration
Crown Removal
Acrylic Temporary Crown – Impression Technique
Possible Problems
The Impression
Packing
Materials
Possible Problems
Impression Trays
Compressed Impression
Possible Problems
Temporary Crown
Objectives of a Temporary Crown
Gold-Anodized Aluminum Crown
Materials
Procedure
Rules to Follow
Possible Problems
Polycarbonate Crown (ion)
Materials
Possible Problems
Transparent Crown Forms (Cellulose Acetate)
Materials
Possible Problems
Stainless Steel Crowns
Stainless Steel Preparation
Burs
Materials
Areas of Concern
Possible Problems
Primary Stainless Steel Crown
Permanent Crown Insertion
Materials
Removal of the Temporary Crown
Anodized Aluminum Crown
Possible Problems
Acrylic Temporary Crown
Seating the Crown
Possible Problems
Possible Solution
Tight Contacts
The Bite Relationship
Underoccluding
Overoccluding
Possible Problems
X-Ray
Cementation
The Crown Is Ready for Cementation
Once the Crown is Seated, Additional Pressure is Applied
Luting
Insertion
Postocclusion
Postoperative
Types of Crowns
Feldspathic Porcelain
Uses
Disadvantage
Captek Crowns
IPS Empress
Advantages
Chairside CAD/CAM Systems – E4D
In-Office Digital Scanners
Bluecam Technology
Lava Crown
Procera All-Ceram Crown
Conclusions