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IPS e.max®

Precision Dental Designs and IPS e.max® will change how you run your practice. The lithium disilicate blocks of IPS e.max are composed of a unique crystalline structure, giving this material its unbelievable esthetics and monolithic strength. It can be crafted as a full-contour monolithic or cut-back and layered with porcelain. In mouth-motion durability studies, IPS e.max tested nearly three times stronger than veneered zirconium oxide. At Precision, we have the capability to produce both IPS e.max CAD and IPS e.max Press, giving your practice the flexibility you need to fulfill your patients’ expectations. With its high flexural strength the risk of fracture is minimal and the need for chairside adjustments is low.

Features:

  • Four levels of Translucency
  • Fracture resistant
  • Strength up to 500 MPa
  • 2.5 – 3 times stronger than other glass-ceramic options
green circle IPS e.max<sup>&reg;</sup>

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.).

ADA Insurance 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)