Serviços (Prótese Fixa)

In-Ceram® Coroas

Quick Facts:

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  • In-Ceram® Spinell offers exceptional translucency and 350 MPa of strength for single anteriors, inlays, onlays and veneers.
  • In-Ceram® Alumina is perfect when a high degree of translucency is required along with a higher strength (500 MPa), as in single posterior crowns.
  • Both achieve natural three-dimensional color, translucency and vitality.
  • All layering and shading from within restoration as in natural dentition.
  • Negligible sintering shrinkage allows marginal fit of 20-25 microns.
  • Provides excellent gingival response, eliminating irritation and unsightly gum recession.

Product Profile:

The first all-ceramic materials certainly offered improved esthetics when compared to conventional metal-ceramic restorations. Unfortunately, they also had inadequate physical properties which hampered their long-term clinical success. Glass ceramic materials, with a higher crystalline content, more even distribution of crystalline reinforcement and smaller crystal size resulted in higher strength and better physical properties. Unfortunately, these systems also had an inherent weakness. Glass is a naturally brittle material that allows fracturing through crack propagation at low critical strains.

Introduced by Vita in 1989, In-Ceram® Alumina signaled the beginning of a new era in esthetic all-ceramic restorations. The reinforcing component utilized with In-Ceram® formed a continuous sintered skeleton-like meshwork. This core meshwork was then infiltrated with a low viscosity lanthanum glass at a high temperature. Crack growth was all but eliminated.

In 1994, the system expanded with the introduction of In-Ceram® Spinell (a mixture of magnesia and alumina) - a framework material with increased translucency for anterior crowns, inlays, onlays and veneers. Both Alumina and Spinell are three to four times stronger than prior dental ceramics. Each results in different properties. The Alumina cores are stronger, but less translucent, than Spinell cores. Therefore, the Alumina cores are recommended for anterior and posterior crowns and anterior 3-unit fixed bridges. The Spinell cores are only recommended for anterior crowns.

All In-Ceram® system crowns and bridges allow you to provide an optimal shade match with Vitadur Alpha veneering porcelain in the new Vitapan® 3D-Master™ Shades as well as Vita Classical (previously called Lumin Vacuum) shades. Unlike manufactured copings, In-Ceram® is easy to adjust prior to glass infiltration, giving the technician complete control. Doctors can use their preferred luting method since the strength of In-Ceram® makes it compatible with conventional zinc phosphate as well as glass ionomer and composite adhesives.

The In-Ceram® system now offers an all-ceramic solution for every indication. Doctors can tailor their all-ceramic restorations to the esthetic need of their patients. Spinell offers exceptional translucency and 350 MPa of strength for single anteriors, inlays, onlays and veneers. Alumina is perfect when a high degree of translucency is required along with a higher strength (500 MPa), as in single posterior crowns.

Chaiside Preparation


Recommended Shade Guides:

Vita Lumin or Vita 3D-Master Shade Guide.

  1. Anesthetize area.
  2. Take preliminary impression.
  3. Remove all defective amalgams and caries.
  4. Select gingival, body and incisal shades of teeth to be restored (NOTE: Best accomplished after old amalgam is gone).
  5. Calcium hydroxide is used over dentin in areas near pulp. Foundation build-up of glass ionomer-resin to eliminate undercuts is preferred to idealize preparation.
  6. Prepare teeth as follows:
    • reduce facial, lingual and proximal surfaces a minimum of 1.2 mm (1.5 mm is preferable)
    • allow for no more than 2.5 mm of incisal or occlusal reduction
    • all line angles should be smooth and rounded
    • insure there is an adequate path of insertion
    • all gingival margins should be butt shoulder or accentuated chamfer
  7. Take a final impression with Panasil vinyl polysiloxane or similar impression material.
  8. Secure and trim an adequate interocclusal record (Regisil or similar material).
  9. Cement temporary restoration.
  10. Prepare detailed lab prescription with details re: opposing teeth, indicate the age and sex of patient and an indication as to the amount of occlusal staining required, as well as any individual characterization needed.

Common Preparation Errors

  1. Insufficiently defined and finished preparation margins.
    • uneven preparation limit ("gutter" preparation, vertical unevenness)
    • irregular marginal reduction of layers (horizontal unevenness)
    • wrong shape of preparation limit
    • unnecessarily deep subgingival preparation
    • preparation in root dentin
  2. Poorly controlled tooth reduction
    • excessive reduction, especially in the upper anterior teeth (vestibular) and premolars.
    • excessive incisal/occlusal reduction causing reduced retention and stability
    • insufficient reduction at the palatal side of the upper anterior teeth (malfunction occlusion)
    • insure there is an adequate path of insertion
    • excessive taper









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Ideal Anterior Labial Surface Preparation with 1 mm depth grooves.

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Correct preparation of the labial surface of the tooth crown in two planes. Image description

Incorrect preparation of the labial surface: preparation in one plane; therefore insufficient reduction of substance. Due to an insufficient wall thickness of the crown, a fracture of the crown may result.

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Incorrect preparation of the labial surface: risk of damaging the pulp.

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Ideal Anterior Crown Preparation (Reduction of the labial and interproximal regions to pre-marked depth grooves)

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Ideal 3-Unit Anterior Bridge Preparation (In-Ceram Alumina only)

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Ideal Posterior Preparation (In-Ceram Alumina only) (Full Circumferential Shoulder 90º - 120º)

Cementation Guidelines

  1. Laboratory crafted restorations can be permanently inserted with a glass ionomer or fine grained zinc phosphate cement. Since the In-Ceram core transmits light like natural dentin, there is some capacity for shade alteration by varying the opacity of the cement (Zinc phosphate has the highest degree of opacity. Glass ionomer has a greater degree of translucency).
  2. Clean tooth preparation of all residual temporary cement.
  3. Seat crown with finger pressure only. Check and adjust proximal contacts if necessary.
  4. If crown fails to seat, use indicating material to determine binding spots (low viscosity silicone material recommended). Place material inside the crown and re-insert crown over preparation wetted with saliva with finger pressure. Once material has set, remove crown. Binding spots are now readily identifiable, easily marked and quickly adjusted with standard diamond tools. Remove silicone residue with acetone or methyl chloride, and clean the tooth with Dentin Conditioner (GC).
  5. Cement with a low viscosity mix and insure that there is an excess around the entire periphery. Maintain firm pressure until set.
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Unesthetic metal-ceramic crowns 12 to 22. Due to discoloration of the dentine, the restoration is cemented with zinc phosphate cement Clinical situation after cementation.
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In-Ceram crowns inserted 13 to 23, cemented with glass ionomer cement since there were no discolorations in the stumps.