Dentaltown November 2012 - (Page 88)

case study feature by Ara Nazarian, DDS, DICOI M ore and more people are becoming aware of what cosmetic dentistry has to offer in their everyday lives, especially in today’s job market. With this awareness, there appears to be an increase in the demand for general dentists to offer cosmetic dentistry in a predictable, fast and effective manner. More than ever before, dentists are challenged to create a beautiful smile utilizing various modalities of restorative dentistry. Zirconia crowns and restorations are becoming popular as an alternative to conventional porcelain-fused-to-metal restorations when full coverage restorations are needed. Zirconia restorations offer function, aesthetics, longevity and gingival health. Coincidently, it is the restoration of choice for many dental providers because they are metal free, aesthetically translucent and stronger than most other restorative materials. Today, dental laboratories use zirconia blocks and discs to mill zirconia copings, frameworks or full contour zirconia crowns and bridges. These blocks are formed under pressure from zirconium oxide powder stabilized with yttrium with additional additives for bonding and translucency. This amazingly strong and biocompatible space-age material has been in use for nearly two dozen years in some of the most demanding technical environments known to man, including the space shuttle and other industrial and medical applications (i.e., hundreds of thousands of hip joints replacements). Zirconia substructures with porcelain overlay are a wonderful conservative modality for creating and restoring aesthetics in the human dentition. The beauty of the porcelain is unsurpassed because of the natural light transmission that occurs through the coping and ultimately through the tooth. It is color stable, strong and has the capacity to last for many years. Preparation It is not necessary to use a shoulder preparation, and featheredge preparations are acceptable. Ideal minimum margin preparation is .3mm chamfer, but all margin preparations may be used, including a full shoulder. • 1mm axial wall reduction • 1mm cingulum/occlusal reduction required Note: As with any all-ceramic, no sharp or right angles. Adjustment Tips • When adjustments are necessary for fit, adjust prepped tooth. • When occlusal adjustments are required on the monolithic zirconia material, use a diamond with water. • Avoid carbide use. Fig. 1: Pre-operative retracted view 88 NOVEMBER 2012 » dentaltown.com http://www.dentaltown.com

Table of Contents for the Digital Edition of Dentaltown November 2012

Dentaltown.com Highlights
Continuing Education Update
Howard Speaks: The Fluoride Wars Continue
Professional Courtesy: Get Out of the Office
Second Opinion: Investing in New Technology
What Are You Guys Cementing Zirconia Crowns With?
Issue with Crown Seats! Help Please!
New Products
Product Profile: The Dental Sleep Network
Dentrix G5
Corporate Profile: Officite
Excellent Communication Benefits: A Full-mouth Rehabilitation Case
Product Profile: TruDenta
The Art, Science and Numbers of Clear Aligner Therapy
Dentaltown.com Research: Endodontics
Cementation Simplified
You Should Know: OperaPager
Matching One Anterior Crown
Desired Smiles in Today’s Economy
Why We See Problems with Teeth Whitening: The Science of Whitening, Part 1
In This Issue: Garbage In, Garbage Out
Perio Reports
Ad Index
Profile in Oral Health: Paleolithic Teeth
Dentally Incorrect

Dentaltown November 2012