IPS e.max®

IPS e.max®

IPS e.max® is a lithium disilicate glass ceramic that has optimized translucency, durability, and strength for full anatomical restorations. IPS e.max® exhibits superior durability and features 360-400 MPa of flexural strength. Due to its high esthetics and strength, it is an affordable alternative to PFMs and layered zirconia-based restorations. The opalescence, translucency, and light diffusion properties of IPS e.max® lithium disilicate were all designed to replicate natural tooth structure for beauty and undetectable restorations. IPS e.max® is biocompatible and provides more than double the flexural strength of IPS Empress®. It also offers a five year guarantee.

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Indications

IPS e.max is the premium lithium disilicate, glass-ceramic restoration. Combining lifelike materials and fracture resistant properties, IPS e.max is as durable as it is lifelike. The flexibility of IPS e.max makes it an excellent restorative method for anterior esthetics or posterior function.

Contraindications

Bridges which include molars, Maryland style bridges, and bridges which have a short vertical height that does not allow for adequate connector height.

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

IPS e.max layered – can be cemented using a resin reinforced glass ionimer such as RelyX Luting cement. Or bonded using a resin cement when extra strength is needed due to lack of retention on the prep, use a resin cement such as RelyX Unicem or RelyX Ultimate.

Tech Notes

If adjustments are needed, use fine diamonds with water and light pressure. Always remove the crown when adjusting or bond/cement crown before adjustments are made.

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)