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04-emax
IPS e.max®

An ideal metal-free option for anterior and posterior crowns, our IPS e.max® has the strength and esthetics to impress your doctors and their patients. Crafted from lithium disilicate-glass ceramic ingots, IPS e.max® boasts a strength of 400 MPa. Traditional cementation processes are not limited by this restoration, allowing your lab to add a personalized touch.

IPS e.max® offers the highest esthetic standards, precisely printed and pressed for accurate fits, and a high flexural strength of 400 MPa.

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. Otherwise, original IPS Empress® or IPS e.max® CAD would be indicated for veneers, inlays and onlays.

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:

  • Vivaglass (Ivoclar Vivadent)
  • GC Fuji (GC America)
  • Ketec Cem (3M ESPE)
  • Panavia F (J. Morita)
  • C&B Metabond
  • Variolink (Ivoclar Vivadent)

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

  • 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)