Dental Tribune Middle East & Africa

Dental Tribune Middle East & Africa Edition | May - June 2013 Using in-office CAD/CAM technology and lithium disilicate to fabricate efficient and predictable restorations Centre for Advanced Professional Practices (CAPP) is an ADA CERP Recognized Provider. ADA CERP is a service of the American Dental Association to assist dental professionals in identifying quality providers of continuing dental education. ADA CERP does not approve or endorse individual courses or instructors, nor does it imply acceptance of credit hours by boards of dentistry. By Author John C.Schwartz, DDS ___________________________________ CAPP designates this activity for 2 continuing education credits. I n today’s fast-paced world, instant gratifica-tion is expected to be synonymous with worthwhile results. This also applies to dental treatments. While there have been many recent technological innova-tions specifically for chairside restorations, dentists have faced complications when mastering complex and time-consuming protocols. The E4D Dentist System™ (D4D Technologies) eliminates those obstacles by providing outstanding clinical results in a single visit using intuitive, efficient and state-of-the-art technologies.The E4D Dentist System’s three-dimensional soft- ware simplifies designing and milling multiple res-torations. This provides dentists with more control over the esthetic process. The E4D in-office CAD/CAM system is equipped with a high-speed intraoral laser scanner for capturing digital impressions, which provides restorations with better- quality fit and function because it incorporates intraoral digital impressions, traditional impressions and models. TheE4DDentistSystemstreamlinesworkfor dentists, who gain the enhanced confidence of pro-ducing reliable restorations for every patient case. Meanwhile, patients receive both enhanced and more efficient care with faster treatment times. Contributing to efficiency and accuracy is the E4D design software, which facilitates required modifica-tions to finalize restorative designs in record time. Restorative designs are then sent to the E4D pre-cision milling unit, which incorporates dual spindles and diamond burs to efficiently form CAD materials into restorations that exhibit exceptional fit, maxi-mized strength and lifelike esthetics. In fact, restora-tions fabricated using CAD/ CAM processing have demonstrated less chipping or fracturing, which enhances the predictability of the restoration.1 Among the materials that can be processed chair-side with the E4D Dentist System is lithium disilicate (IPS e.max® CAD, Ivoclar Vivadent), which is available for processing CAD/CAM restorations indicated for placement in the anterior and posterior. The material is also indicated for an assortment of dental procedures, including partial and full coverage inlays and onlays, thin veneers (0.3 mm) and implant superstructures. Lithium-disilicate glass ceramic trumps traditional ceramic materials because of its durability and high flexural strength values. Case presentation A 55-year-old woman presented requesting re-moval of the maxillary left bicuspid and molar crowns. Their unsightly margins and the gold res-torations were visible in her smile (Figs. 1, 2), and the patient had grown weary of their unsettling and lackluster appearance. Her goal was to whiten her dull- looking teeth in order to reflect the brighter color of her natural anterior dentition.In- office CAD/CAM restorations (IPS e.max CAD) were discussed with and agreed to by the patient. The optical qualities of IPS e.max CAD, which include a fairly low refractive index, optimal light transmission and lifelike translucency, would provide natural-appearing and highly esthetic restorations.2,3 Fig. 1 A preoperative, buccal view of the patient’s smile revealing unsightly crown margins and gold restorations. (Photos/Provided by Dr. John C. Schwartz) Fig. 1 Fig. 2 Fig. 2 Preoperative occlusal view of the patient’s unsatisfactory restorations. Fig. 8 The internal aspects of the crowns are cleaned, etched and silanated. Fig. 9 Ceramic Etching Gel is applied for 20 seconds, rinsed with water and dried. In preparation for salinating using Monobond Plus primer. Fig. 10 The Monobond Plus Primer was applied with a microbrush for 60 seconds. Fig. 11 The preparations are cleaned and three drops each of Multilink A&B solution are mixed in a well. Fig. 5 Fig. 6 Fig. 8 Fig. 10 Fig. 11 Fig. 9 ” See FILLING, page 9 mCME articles in Dental Tribune have been approved by HAAD as having educational content for CME credit hours. This article has been approved for 2 CME credit hours. Fig. 3 Fig. 5 Fig. 7 Fig. 4 Fig. 6 Fig. 3 Scan of the patient’s prepared teeth with margins identified. Fig. 4 View of the CAD proposals created utilizing Autogenesis. Fig. 5 Buccal view of the CAD proposals. Fig. 6 Optimization of CAD proposal to account for occlusion and contact pressure. Fig. 7 Optimization of CAD proposal with model and occlusion in place. 8 Media CMe

Dental Tribune Middle East & Africa

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