IPS e.max is an affordable, metal-free alternative to PFMs and provides world-class esthetics and outstanding marginal accuracy. Its unique lithium disilicate framework has added strength (360 MPa) for single unit anterior or posterior crowns and 3-unit anterior bridges. IPS e.max can be cemented with low expanding glass ionomer cements or bonded with resin cements when indicated. Prescribe IPS e.max to achieve maximum esthetics, virtually perfect contacts and occlusion, and impressive strength.
New! Read the IPS. emax Durability Study
PREP REQUIREMENTS
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 1.5-2.0 mm; 1.0-1.5 mm lingual contact clearance. Incisal reduction is 1.5-2.0 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 1.5-2.0 mm: axial reduction (buccal, lingual and interproximal) is 1.5 mm with rounded internal line angles.
RECOMMENDED CEMENTATION
For greatest strength, and where preparation allows for dry field (supra-gingiva margins), it is recommended to use adhesive bonding, such as Multilink Automix (Ivoclar Vivadent) or similar dual cure materials. 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% expansion.
Below is a list of recommended resin cements:
- Speedcem (Ivoclar Vivadent)
- Panavia F 2.0 (Kuraray) -ideal for short, tapered preparations
- Resin Ionomer cement (RelyX or RelyX Unicem, 3M ESPE)
- Maxcem Elite (Kerr)
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