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February 2009 | Dental Lab Products
Step-by-Step: IPS e.max Press


Pressing in full


Using IPS e.max Press pressable lithium disilicate material for full-mouth reconstruction.


By Brent West, Vice President and GM, Frontier Dental Laboratory. Information provided by Ivoclar Vivadent Inc.



All-ceramic materials increasingly are being used for full-mouth reconstructions. When presented with such cases, it is incumbent upon laboratory ceramists to select an all-ceramic material that is not only esthetic, but also strong enough to function where and when needed. In the past, an increase in material strength usually meant a decrease in esthetics.

The IPS e.max all-ceramic product line includes a high-strength, lithium disilicate material suitable for pressable fabrication techniques. As such, technicians can realize true simplicity and versatility when fabricating high-strength, esthetic metal-free restorations because the lost-wax pressing techniques they’re accustomed to can be used.

Additionally, the IPS e.max Press material is optimal for satisfying various case needs, including those for esthetics, function, or strength. Whether the restorations are to be placed in the anterior or posterior segment or both, the IPS e.max Press material enables laboratory ceramists to provide dentists with solutions that can be conventionally cemented or adhesively bonded.

Following are the laboratory procedures for using IPS e.max Press when fabricating restorations for a full-mouth reconstruction case. Shade match and blending of the optical properties was facilitated by the highly translucent nature of the material. The material’s inherent strength of 400 MPa was optimal for use in stress-bearing areas.


CASE IN PICTURES: SLIDESHOW

(Refer to slideshow for figures)

Case Description & Laboratory Protocol
This case involved restoring the upper and lower arches (teeth Nos. 2 through 15 upper arch; teeth Nos. 18 through 31 lower arch). The ingot shade selected was BL1, but the final shade of the restorations would be BL2. Note: The second molars were restored with gold onlays.

The clinician performed the standard preparation, impression taking, and temporization protocols. At the laboratory, models were made from the impressions.

01 Wax the case to full contour, cut-back, invest, and press (Figs. A and B).

02 Press and fit the units to the original dies. Desprue, and complete additional cut-backs (Fig. C).

03 Apply IPS e.max Ceram White Blue powder on the mesial line angle to build up the restoration. Then, apply an assortment of dentin and incisal powders to build-up the mammelons (Figs. D and E): BL1 Body Dentin and BL1 Incisal (1:1); SI Yellow and BL1 Incisal (1:1); T Blue and BL1 Incisal (1:1).

04 Fire the units according to manufacturer’s instructions (Fig. F).

05 Layer BL1 incisal powder over the entire body of the restorations to achieve depth of translucency (Fig. G).

06 Fire the restorations a second time

(Fig. H).

07 Complete final contouring according to the parameters outlined by the clinician (Figs. I and J).

08 Glaze and hand-polish the entire case (Figs. K and L). 

 


IPS e.max Press

Features

• Biocompatible lithium disilicate glass ceramic

• Offers exceptional fit, form, function, and flexural strength

• Kind to opposing dentition

• Offered in low, medium, and high opacities to meet clinical needs

• Lifelike esthetics independent of prepared tooth shade

• Allows conventional or adhesive cementation

 
 

Initial Buildup

We like to build from mesial to distal (see diagram). For the body, we use a 1:1 mixture of e.max Ceram BL1 Body Dentin and BL1 Incisal. On the mesial line angles, e.max Ceram White/Blue. In the extreme middle of the incisal edge, a 1:1 mixture of e.max Ceram SI Yellow and BL1 Incisal for some “maverick” coloring. On the distal line angle, a 1:1 mixture of e.max Ceram T Blue and BL1 Incisal.

 

 

Ivoclar Vivadent

USA
175 Pineview Drive
Amherst, NY 14228
800-533-6825


Canada
2785 Skymark Ave.
Mississauga, ON L4W 4Y3
800-263-8182
www.ivoclarvivadent.com
info@ivoclarvivadent.com

 

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