IPS E.MAX® CAD

Standard in-lab turn-time: 3 Days

An innovative full-contour zirconia formulated to surpass the translucency of traditional monolithic zirconia, our Full Contour Zirconia benefits from flexural strength about three times that of natural enamel. Available in 16 pre-shaded VITA® blocks for consistent, natural coloration on every restoration.

Indications

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.

Contraindications

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.

Preparation

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.

Cementation

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:

Tech Notes

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.

Codes