About the Product
IPS e.max® is made of monolithic lithium disilicate ceramic and delivers outstanding esthetics and precision fit. An affordable alternative to PFMs and zirconia-based restorations, IPS e.max can be pressed or milled using Enhanced CEREC® software and the Sirona inLab® MC XL milling machine.
Prescribe IPS e.max to achieve optimal esthetics, virtually perfect contacts and occlusion, and impressive strength. Its unique lithium disilicate ceramic provides flexural strength of 360–400 MPa, making it the ideal high-strength solution for single-unit anterior or posterior crowns, veneers, inlays, onlays, screw-retained implant crowns, 3-unit anterior bridges or restorations with minimum preparation dimensions.
Conventionally cement using resin ionomer cements or bond for maximum retention on nonretentive preparations. Lithium disilicate ceramic is biocompatible and provides more than double the flexural strength of IPS Empress® Esthetic.
Production Time: 5 working days in-lab
- Anterior full-coverage crowns require a chamfer or shoulder margin. A circular shoulder is prepared with rounded inner edges or a chamfer at an angle of 10–30 degrees: the width of the shoulder/chamfer is approx. 1 mm. Facial reduction is 1.5–2 mm; 1–1.5 mm lingual contact clearance. Incisal reduction is 1.5–2 mm with rounded internal line angles, and an incisal edge at least 1 mm wide to permit optimum milling of the incisal edge during CAD/CAM processing.
- Posterior full-coverage crown requires a chamfer or shoulder margin. A circular shoulder is prepared with rounded inner edges or a chamfer at an angle of 10–30 degrees: the width of the shoulder/chamfer is approx. 1 mm. Occlusal reduction is 1.5–2 mm: axial reduction (buccal, lingual and interproximal) is 1.5 mm with rounded internal line angles.
- If adjustment is required on the ceramic, ALWAYS CEMENT OR BOND INTO PLACE BEFORE PROCEEDING, then use a fine diamond with water to keep the crown cool. To contour the crown, polish with a porcelain polishing wheel (Brassler, Shofu and Vident) and diamond polishing paste.
- Caution: Do NOT attempt to fire porcelain. IPS e.max ceramic requires specific stains and glaze, as well as precisely calibrated ovens at specific temperatures and vacuum settings.
- For best results, return crown for re-glaze firing to lab.
For greatest strength, and where preparation allows for dry field (supragingival margins), it is recommended to use adhesive bonding, such as VarioLink II (Ivoclar Vivadent) or similar dual-cure materials (Insure, Cosmedent; Nexus, Kerr; Choice, Bisco, Inc.; Lute-It, Pentron).
For areas subgingival, or when a dry field cannot be achieved, Ivoclar Vivadent recommends a hybrid glass ionomer cement system with less than 0.5 percent expansion. (NOTE: Resin-reinforced glass ionomers (Advance, Vitremer) are not indicated for any all-ceramic restoration.)
Below is a list of recommended resin cements:
- Vivaglass (Ivoclar Vivadent)
- GC Fuji (GC America)
- Ketec Cem (3M ESPE)
- Panavia F (J. Morita)
- C & B Metabond
- Variolink (Ivoclar Vivadent)