Dental Tribune U.S.Edition No.2, 2017

a10 INDUSTRY NEWS Dental Tribune U.S. Edition | February 2017 Smile renewed with Obsidian lithium silicate ceramic ChiCago BooTh No. 3617 By Glidewell Laboratories Staff According to manufacturer Glidewell Laboratories, the company’s Obsidian® lithium silicate ceramic is a state-of-the- art restorative material that can be used for PFM, all-ceramic and chairside-milled cases. With this versatility, Obsidian en- ables clinicians to prescribe a single ma- terial for virtually any indication in the mouth. A simplified workflow can ensue because Obsidian helps achieve a cohesive appearance across the arch, even when the oral situation demands multiple types of restorations, the company reports. Obsidian offers more than four times the flexural strength and twice the chip resistance as traditional feldspathic ce- ramics, according to the company. Fur- thermore, Glidewell reports that the translucency and esthetics of the material match those of natural dentition, making Obsidian an optimal combination of util- ity and beauty. Metal” restorations, are exceptional PFMs for today’s clinician. Rather than fusing feldspathic porce- lain to cast metal, Obsidian lithium sili- cate ceramic is pressed to laser-sintered understructures to form a modernized PFM. Each case is designed digitally and fabricated through unique computer-con- trolled processes, resulting in precise res- torations. The understructures are made through a method in which a program- mable laser beam strikes metal powder to build the desired shape, layer by layer. The anatomy is formed by heat-pressing lithium silicate into a 3-D–printed mold. According to Glidewell, finished “Obsid- ian Pressed to Metal” crowns and bridges achieve far greater strength than their traditional PFM predecessors. It describes the natural-looking, chip-resistant resto- rations as being ideal for covering dark preps and endodontic posts. Indications include crowns and bridges anywhere in the arch, and screw-retained and cement- ed implant restorations. Pressed to metal According to Glidewell, the latest release in the product line, “Obsidian Pressed to All-ceramic Obsidian all-ceramic restorations are made from the same lithium silicate ce- ramic used for the pressed- to-metal restorations, mean- ing that monolithic and ceramo-metal prostheses can be placed adjacent to one another with highly successful results. These all-ceramic restorations mirror the vitality and translucency of natural denti- tion and are indicated for individual ante- rior and posterior crowns, veneers, inlays, onlays and three-unit anterior bridges. Case presentation By Anamaria Muresan, DMD, CDT A male patient presented to the Glidewell Laboratories operatory unsatisfied with the mismatched appearance and chipped, uneven incisal edges of his maxillary cen- tral incisors. The patient reported that he was so un- happy with his current oral situation that he never smiled. We restored his smile us- ing Obsidian lithium silicate ceramic, placing one pressed-to-metal crown and five veneers. Looking at the before im- age, note that tooth #8 appears gray due to previous root canal treatment and the resulting metal post showing through the all-ceramic crown. When a patient presents with a metal post, my rationale is to use a Ad Obsidian lithium silicate ceramic is pressed to laser-sintered understructures to form a modernized PFM. Each case is designed digitally and fabricated through computer- controlled processes to achieve precise restorations. Photos/Dr. Anamaria Muresan, Provided by Glidewell Laboratories PFM to stop the show-through. The Obsid- ian “Pressed to Metal” crown used here completely hid the endodontic post, with- out forcing me to select an unesthetic, dark shade in hopes of masking the post. The Obsidian “Pressed to Metal” crown on tooth #8 and Obsidian veneers on #6, #7 and #9–11 easily match one another in terms of shade and esthetics. The patient was thrilled with the life-changing outcome.

Dental Tribune U.S.Edition No.2, 2017

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