Obsidian® Fused to Metal restorations are state-of-the-art PFMs for today’s clinician. They are over four times stronger and achieve two times more chip resistance than conventional feldspathic porcelains. By pressing lithium silicate ceramic, rather than traditional porcelain, to metal the finished restorations achieve far greater strength than that of their predecessors. These natural-looking, chip-resistant restorations are ideal for areas where monolithic restorations are contraindicated, such as covering dark preps or endodontic posts when occlusal reduction or vertical dimension is limited.
Biaxial flexural strength is measured by applying force to the test discs until the ceramic fails. Obsidian ceramic takes over four times the force to fracture compared to the force necessary to fracture conventional feldspathic porcelains (PFM veneering ceramics).
Chip resistance is measured by applying a point-force (load) on the edge of a test sample until chipping occurs. Obsidian Fused to Metal withstands more than twice the load compared to feldspathic porcelains.
Data provided by the Glidewell Laboratories Research & Development department, 18651 Von Karman Ave., Irvine, CA 92612.
Obsidian is designed with an innovative combination of more than 20 unique elemental oxides chosen from the periodic table (including zirconia). The Obsidian material owes its excellent properties to a very high content of ultrafine, nanometer-size lithium silicate and lithium phosphate crystals.
The Obsidian® Stain and Glaze Kits include all of the components necessary to colorize and finish glass-ceramic and zirconia restorations. With one option ideal for clinicians who mill in-office restorations and one ideal for laboratories, the kits consist of paste stains, a glaze liquid and powder, mixing palette, and brush. The chairside version contains shades A, B, C and D, and the colors white, blue and orange; beyond these, the lab version additionally includes the colors black, brown, green, gray, ocher, pink, violet and yellow. The kits assist users in accomplishing all base shades from A through D, according to the VITA® Classical and Chromascop bleach shade systems.
With these kits in hand, users can enhance incisal translucency, mimic natural decalcifications, add characterization, and adjust overall colorization to better match milled restorations to the patient’s oral situation. The Obsidian stains and glazes have an optimal thermal expansion value, which helps ensure restorations are both strong and esthetic after final firing. Refills of all the included components are available through your distributor.
VITA is a registered trademark of VITA Zahnfabrik.