Restorative Techniques

Gingival Crown Margin Repair

Download
crown margin repair

After a slight long bevel on your porcelain, a light cured rubber dam material is placed to protect the gingival tissue (GINGA-Guard, Cosmedent). Hydrofluoric acid (clear) is placed on porcelain for 3 ½ minutes and then washed with copious amounts of water. *Check etch to make sure porcelain is frosty to ensure the etching is complete. Remove GINGA-Guard and etch dentin with etchant of choice. Silanator is then placed on porcelain followed by a bonding adhesive on both dentin and porcelain. Cure for 20 seconds. Creative Color Pink Opaque (Cosmedent) is applied to block out dark color of tooth. If metal is showing also brush Pink Opaque onto the metal to neutralize the gray color. Pink Opaque is polymerized and then a Microhybrid (or Nanofill) is applied over the top. The composite is left just on the leading edge of the long bevel. The composite is then cured and overlayed with the same shade of Microfill to simualate enamel. The Microfill is polymerized for 60 seconds and then the final restoration is shown after finishing and polishing.

Gingival crown margin repair

Application of GINGA-Guard™ light cured rubber dam. Notice the long bevel on the porcelain

Cosmedent Clear Hydrofluoric Acid on porcelain for 31/2 minutes. Rinse away with copious amounts of water

Notice completely etched surface of porcelain

Remove GINGA-Guard, and etch dentin using 37% phosphoric acid, rinse with copious amounts of water

Application of bonding agent after the placement of silanator on porcelain only.

Application of Creative Color Pink Opaque

Application of Renamel Microhybrid composite.

Application of Renamel Microfill in the same shade as your Renamel Microhybrid composite. Cure for 60 seconds, finish & polish.

Now that’s invisible!

About the AuthorDr. Dennis Hartlieb

Dr. Dennis Hartlieb is a graduate of the University of Michigan School of Dentistry and maintains a full-time practice committed to cosmetic and restorative dentistry in the Chicago suburb of Glenview, Illinois. Dr. Hartlieb is an instructor at the Center for Esthetic Excellence in Chicago and was formerly an Adjunct Associate Professor at the Marquette University School of Dentistry in Milwaukee, Wisconsin. Dr. Hartlieb has authored numerous articles on restorative and esthetic dental techniques.

Dr. Hartlieb is an Accredited member of the American Academy of Cosmetic Dentistry (AAACD), a member of the American Academy of Esthetic Dentistry (AAED), the American Academy of Restorative Dentistry (AARD), the American Dental Association, the American College of Dentists, and the American Academy of Dental Sleep Medicine. He is the founder of Dental Online Training (DOT), an online hands-on training program for dentists, dental auxiliaries, and dental students. Dr. Hartlieb is also an examiner for the AACD Accreditation process.