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Step-By-Step: IPS e.max Press Impulse

Using IPS e.max Press Impulse ingots for minimal-prep veneers, 3-unit bridge.
Dental Lab Products
Mon, 2010-11-08 20:54 | By Matt Roberts AAACD; and John Roberts DDS. Information provided by Ivoclar Vivadent.

IPS e.max Press Impulse

IPS e.max Press Impulse


  • Same flexural strength (400 MPa) of original IPS e.max Press ingots
  • Expands the restorative possibilities for smile design
  • Can be cemented using esthetic resin cement or adhesively bonded

Ivoclar Vivadent Inc.
800-263-8182 (in Canada)

Laboratory ceramists and their dentists often are faced with restorative cases that demand the use of a singular material capable of simultaneously providing conservative esthetics and sufficient functional strength. Lithium disilicate is increasingly being used in clinical situations demanding the highest physical and optical characteristics.

Unlike conventional PFM restorations, lithium disilicate ­restorations are uniformly strong and esthetic and allow dental professionals to provide highly cosmetic restorations in a conservative manner. Additionally, the enhanced strength and presence of a glassy matrix allows dentists to either conventionally cement or adhesively bond lithium disilicate restorations.

The recently introduced IPS e.max Press Impulse line of ingots expands the restorative possibilities for smile design and is ideal for enamel replacement with minimally invasive preparations. The new Impulse ingots include three Value shaded ingots in an intermediate translucency and two Opal ingots that provide dental professionals with a high level of natural opalescence to beautifully mimic the look of ­natural dentition.

Created to meet the demands of dental professionals around the world, IPS e.max Press Impulse ingots can be used in single tooth restorations, bridges in the anterior, implant super structures, veneers and thin veneers. With a strength of 400 MPa, IPS e.max Press Impulse ingots demonstrate the same flexural strength of the original IPS e.max Press ingots and can be reliably pressed to as thin as 0.3 mm for veneers.

The IPS e.max Press ingot product line, originally available in four translucencies (High Translucency, Low Translucency, Medium Opacity, High Opacity) and two sizes, has been greatly expanded with the introduction of IPS e.max Impulse ingots. By providing translucencies and new shades with the same exceptional strength of the original IPS e.max Press ingots, Impulse ingots enable dental professionals to provide their patients with the most functional and life-like esthetics possible in restorations requiring the use of lithium disilicate glass-ceramics.

Developed with the same quality of Ivoclar Vivadent materials, IPS e.max Ceram Impulse veneering materials are specially developed to create individual characterization. Pressable lithium disilicate restorations (IPS e.max Press, Ivoclar Vivadent) are fabricated utilizing a hot wax press technique, and due to crystal size and length, the flexural strength of pressable lithium disilicate is 400 MPa.

Case Description

A healthy 61-year-old woman presented with the intention of replacing the bridge spanning tooth Nos. 10-12 for cosmetic reasons, but didn’t want her otherwise healthy tooth Nos. 6-9 prepared (Fig. A). The right-hand bicuspids (Nos. 4 and 5) previously had been treated with titanium post and cores, but at the time of presentation, the patient was uninterested in post build-ups and desired only composite build-ups.

However, during a discussion of treatment options, the patient was informed that it would be possible to create a uniform appearance to her smile (i.e., including Nos. 6-9) by keeping tooth preparation to a minimum (e.g., only 0.3 mm). After demonstrating the proposed changes using intraoral mock-ups, she accepted the proposed treatment plan.

Esthetic/Clinical Challenge

The need to provide patients with minimal preparations while simultaneously addressing esthetic and color blocking issues (e.g., old dark tooth structure from root canal therapy) can require a combination of restorations that range from thin, for esthetics and conservation of tooth structure, to thick, for adequate strength. In this case, the restorative material of choice was lithium disilicate (IPS e.max), and in particular the recently introduced Opal ingot.