IPS e.max® CAD
Standard in-lab turn-time: 3 Days
The industry-leading esthetics of IPS e.max® with DIL’s precision-milled craftsmanship make this one of our most popular restorations. Milled from a monolithic block of lithium disilicate, many doctors favor e.max for smile design and anterior restorations when only the most lifelike reconstructions will suffice. A wide variety of shades and translucency allows for maximum cosmetic flexibility.
IPS e.max® CAD is indicated for full anterior or posterior crowns. IPS e.max® press is indicated for full anterior or posterior crowns and three-unit bridges having only one pontic with the second bicuspid as the most distal abutment. Veneers can also be indicated and are recommended when combining with adjacent IPS e.max® crowns or bridges, provided ample reduction is achieved.
IPS e.max® should not be used on patients with malfunctional occlusion such as bruxers or clenchers. IPS e.max® should not be used as abutments for cast partials. IPS e.max® should not be used in situations when preparation requirements cannot be achieved. IPS e.max® is not indicated for Maryland-type bridges.
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°: 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 1mm 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°: 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.
For greatest strength, and where preparation allows for dry field (supra-gingiva 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.)
Some recommended resin cements:
- Vivaglass (Ivoclar Vivadent)
- GC Fuji (GC America)
- Ketec Cem (3M ESPE)
- Panavia F (J. Morita)
- C&B Metabond
- Variolink (Ivoclar Vivadent)
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.
- D2740 Crown
- D2610 Inlay for 1 surface
- D2620 Inlay for 2 surfaces
- D2630 Inlay for 3 surfaces
- D2962 Labial Veneer
- D2783 Crown 3/4 Porcelain Ceramic (does not include veneers)