Serviços (Prótese Fixa)

IPS Empress ®

Quick Facts:

Our AE (Advanced Esthetic) Teams of LVI trained cosmetic specialists have perfected unique layering techniques that make IPS Empress restorations come alive.

  • Indicated for inlays, onlays, veneers, anterior single crowns (where superior esthetics are a key consideration)and
  • posteriorsingle crowns (only in non-stressed teeth).
  • Leucite glass ceramic used clinically for over ten years.
  • All-ceramic system utilizes pre-shaded ceramic ingots and a unique pressing technique.
  • Optimally co-ordinated degrees of translucency and slight shading.
  • Individually characterized ceramic core (in all Vita and Chromascop™ shades).
  • Improved and simplified shade selection with Chromascop™ and Dentin-stump guides (27 shades).
  • Pressure injected. High flexural strength values without metal. Tensile strength of 200 MPa.
  • Excellent marginal fit at approximately 70 microns reduces marginal leakage and breakage. Margins can be finished (or end) above the gingival margin or at the margin.
  • Wear nearly identical to enamel so not abrasive to opposing dentition.

Product Profile:

With the introduction of IPS Eris™, Ivoclar North America has dramatically increased the range of all-ceramic restorations into the realm of three-unit anterior bridges. In combination with the original IPS Empress® (or "Empress 1" as some clinicians are calling it), dental practitioners can now create inlays, onlays, veneers, single anterior or posterior crowns and anterior bridges using the same comprehensive system and laboratory. All with the esthetics, accuracy and fit you've come to expect from IPS Empress® and Aurum Ceramic Dental Laboratories.

Unparalleled Beauty and Natural Vitality

The original IPS Empress® leucite glass-ceramic has been used clinically for over ten years. Optimally coordinated degrees of translucency and the slight shading give the leucite glass-ceramic material a chameleon effect. This ensures the restorations fit into the natural oral environment and are virtually indiscernible. Shade control is enhanced by patient-specific detail and characterization supplying you with virtually unlimited control over color, custom staining, form, surface detail and texture. Original IPS Empress® continues to be indicated, and recommended, for aesthetic inlays, onlays, veneers and single-unit anterior crowns. IPS Empress® is particularly well suited for conservative veneering as it allows the pressing of restorations less than 0.8 mm thick. This allows preparations that conserve natural tooth structure.

Enduring Strength Without Metal

Its leucite reinforced, pre-ceramed structure and pressure-injected fabrication offer you twice the strength of conventional ceramic materials. Resin bonding has also been demonstrated to significantly increase the overall strength of a restoration. The IPS Empress® system incorporates a full bonding system to ensure superior strength, less breakage and fewer repairs.

Chaiside Preparation

Anterior Crown Preparation Veneer Preparation Posterior Crown Preparation Inlays/Onlays


Shade Selection

Recommended Shade Guides: Ivoclar Chromascop®.

General Considerations

  1. Ensure even reduction of the anatomic form.
  2. Avoid sharp internal edges, angles and undercuts. Create rounded internal line and point angles, particularly at the linguoincisal line angle.
  3. Create a shoulder preparation of 1.2 mm at a 90-110º angle. Maintain shoulder preparation with butt joint margins. Avoid tapered margins, feathered edges and bevelled margins.

ANTERIOR CROWN PREPARATION

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  • Reduce lingual surface 1.5 mm at the area of centric contact (not less than 1.0 mm) and 0.8 to 1.0 mm along the remaining lingual surface.
  • Incorporate taper of 8 to 10 degrees (never more than 12º)
  • Tooth preparation length should reflect a 1.5 to 2.0 mm occlusal (incisal) reduction.

VENEER PREPARATION

Uniform Facial Preparation
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A medium grit, round-ended, diamond bur is used to remove a uniform thickness of facial enamel by joining the depth-cut grooves.


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Join the depth grooves in three places by angling the diamond bur to the corresponding gingival, middle or incisal plane of the tooth.

Chamfer Margins
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Correct preparation of the chamfer margins interproximally allows appropriate bulk of porcelain.

Interproximal Extension
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Using the same round-ended diamond bur, the interproximal preparation is extended from the gingival chamfer margin into the proximal space. NOTE: Eliminate all discolored enamel in the interproximal.

Incisal Preparation
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The diamond bur is angled to bevel back the incisal edge.

Lingual Reduction to Increase Length
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The diamond bur is angled to eliminate undercuts and establish a deep chamfer on the lingual aspect of the preparation to ensure a passive fit. The incisal edge should be rounded. Avoid all sharp angles.

POSTERIOR CROWN PREPARATION

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INLAYS/ONLAYS

Inlay Preparation
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  • Avoid sharp internal line angles and undercuts.
  • Smooth prep walls and trim excess lining material with finishing diamond or bur
  • Do not include undercuts
  • Create a 5º to 15º divergence in the proximal walls from the floor to the occlusal margin of the preparation.
  • Ensure all walls end in a butt margin.

Onlay Preparation
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  • Avoid sharp internal line angles and undercuts.
  • With onlays, cuspal reduction of a minimum of 1.5 mm is required.
  • Smooth prep walls and trim excess lining material with finishing diamond or bur.
  • Do not include undercuts
  • Create a 5º to 15º divergence in the proximal walls from the floor to the occlusal margin of the preparation.
  • Ensure all walls end in a butt margin.