European Quality Craftsmanship Made in America
February 13, 2014
The IPS Emax Press
Today, cements are more than just “space fillers,” as many contemporary indirect restorations require strong adhesion to the tooth substrate when conservative, least-invasive preparations are utilized. Conservative dentistry dictates that only the defective portion of the tooth is prepared, often negating the ability to create classical retention and resistance preparation forms utilized with more aggressive full and partial coverage crowns.
Emax from Ivoclar
In a recent study at New York University School of Dental Medicine, the flexural strength of 440 mpa exceeds that of porcelain-to-zirconia restorations. The aesthetics of lithium disilicate has been improved with the high translucency ingot, which yields impeccable results along with incredible toughness to fracture.
A literature review of longevity and clinical performance of IPS Emax restorations revealed favorable clinical results. The survival rate and long-term behavior of all-ceramic restorations on molars. Pressed ceramic Emax and CAD/CAM Emax were compared. Clinical recall at 28 months after luting with a light polymerized resin cement showed a 97 percent survival rate for the Emax CAD and 100 percent for Emax pressed. The clinical accuracy of the marginal fit for both Emax CAD and Emax press were excellent.
Emax Lithium disilicate is becoming the restorative material of choice when it comes to single-unit indirect restoration. Full-contour posterior crowns fabricated out of Emax CAD offers 360 mpa of strength throughout the whole crown, which demonstrates the “monolithic” strength unlike any other metal or metal-free crown. When comparing studies of strength (mpa) to porcelain fused to metal (80–100 mpa) or porcelain veneered to zirconia (100 mpa) and leucite glass.