Wol-Ceram

The first all-ceramic crown allows you to prepare a conservative feather-edge or chamfer margin. Wol-Ceram copings are made from Vita® In-Ceram® alumina material. Wol-Ceram’s beautiful, natural esthetics result from a dentin colored coping that prevents opaque show-through.

Materials

Wol-Ceram uses innovative technology in order to recreate the natural look of teeth. Wol-Ceram's copings, bridges, and implant abutments are fabricated out of VITA In-Ceram, Spinell, Alumina, and Zirconia materials. The final veneering of the restoration is done following standard procedures with any of the porcelains currently available for Wol-Ceram such as Vita VM7, Vita Alpha, Noritake Cerabien, Jensen Creation AV, or Vintage AL Esthetic Porcelain.


Facts About Wol-Ceram Materials...

Proven

Other all-ceramic systems emphasize high strength or short term success rates. What really counts is long-term clinical reliability. VITA In-Ceram® is the only all-ceramic system proven by millions of successful restorative cases spanning more than 13 years. In-Ceram's success rate of over 98% assures you of a restoration in which both you and your patient can have the highest confidence

Flexible

In-Ceram puts you in control, providing you with options that let you optimize the physical properties of your In-Ceram restoration to match the unique needs of each case. No other all-ceramic system gives you these features.

Physical Property (Choice of Strength):

In-Ceram Zirconia = 700 Mpa Flexural Strength1
In-Ceram Alumina = 500 Mpa Flexural Strength2
In-Ceram Spinell = 350 Mpa Flexural Strength2
References
1. Vita Zahnfabrik Technical Bulletin, 1998.
2. Seghi, Sorensen Int J Prothodont 8:239-246, 1995.

Physical Property (Translucency):

In-Ceram Spinell = Very High translucency
In-Ceram Alumina = High translucency
In-Ceram Zirconia = Moderate translucency

Physical Property (Optimal Shade Match):

In-Ceram veneered with Vitadur® Alpha porcelain in new Vitapan® 3D-Master™ Shades as well as Vita Classical Shades

Physical Property (Adjustable Margin):

In-Ceram is easy to grind prior to glass infiltration unlike manufactured copings.

Veneering with VITAVM7

Veneering with VITAVM7 material offers you and your patients some truly outstanding benefits. VM7 exhibits outstanding physical properties, and, due to its super-fine microstructure, produces clinical wear characteristics that mimic those of enamel.

Advantages of VITAVM7

- VM7 is extraordinarily kind to antagonistic dentition
- VM7 offers optimum firing stability, preserving shades and morphology even after several firings
- VM7 produces the most life-like results possible in dental porcelain today
- VM7 uses the proven shade matching capability of the 3D-Master shade system

Veneering with VITADUR ALPHA

Vitadur Alpha is a completely new development based on studies of natural teeth; it is metal-free and designed for conventional as well as new all-ceramic applications. Vitadur Alpha is carefully matched to the refractive index, reflection characteristics, and transparency of natural teeth. Vitadur Alpha has a wide range of intensive porcelains for color effects, particularly in the enamel and incisal areas. Vitadur Alpha also closely resembles natural teeth in terms of luminescence and translucency.


Other materials used with the Wol-Ceram System...

Noritake Cerabien is a specially developed porcelain used in making all ceramic crowns and bridges using Alumina frameworks. It does not cause any allergies and has the advantage no black lines at all in the cervical area.

Jensen Creation AV is specially formulated for use with aluminum oxide copings such as In-Ceram(r). Creation AV combines the benefits of traditional ceramics with the esthetic advantages of all-ceramic restorations.

Vintage AL Esthetic Porcelain is the result of years of experience in the development of porcelain materials. The basic Vintage Porcelain Kit is complemented by a full range of accessory kits enabling the technician to economically produce highly esthetic quality restorations.

VCementation for In-Ceram
Please use any conventional cement for In-Ceram. If you would like to bond In-Ceram, use Panavia 21 TC, or Rely X from 3M. DO NOT use a Glass Ionemer Resin or GIR that expands.


FAQ about Wol-Ceram

Q. What is Wol-Ceram?

Wol-ceram is a new highly sophisticated electro-layered ceramic system and a CAD-CAM system that produces strong Zirconia, Alumina or Spinell All ceramic restorations.

Q. What is the difference between Wol-Ceram and In-Ceram?

Wol-ceram is a manufacturing process that uses the proven In-Ceram material from Vita.

Q. Is In-Ceram a strong material?

Yes. It is one the materials exhibiting proven durability in millions of successful clinical cases taking place over a decade.

Q. Are the copings one color shaded?

No. They are pre-shaded in the dentine color, Vitapan 3-D Master or Vita classical shades.

Q. How does the Wol-Ceram system work?

It uses an electro-layering process in which the material gets electrostatically charged and applies an even coat of material to the die.

Q. What are the advantages of using the Wol-ceram system?

- Fabricates copings, bridges, veneers and implant abutments
- Works directly on the master die
- No special margin is needed
- Very cost effective
- Production in house
- Fast turn around time
- Pre-shaded in the dentine color

Q. Does Wol-ceram require any type of preparation?

No special margin is needed. It works with any preparation.

Q. What is the preferred method of cementation?

The most recommended are: Panavia 21 T and RelyX from 3M.


"Factors Affecting Restoration Selection"

By Dr. John C Cranham


"Choose the material that's right for your patient

Perhaps nothing is more confusing than sifting through the myriad of esthetic materials to choose the right product for any given situation. As practitioners, we have a tendency to get comfortable with one or two materials, and then make our patients fit the material. But that is not the best way to practice dentistry.

Material Selection Criteria

There are at least six factors to consider when choosing a restorative material. Let's take a look at each factor briefly.

1.Esthetic Risk

Typically 1.0-3.0 mm of maxillary incisal tooth structure shows at rest in a youthful smile. From this position, if the patient has a high esthetic demand and shows a great deal of tooth structure (more than 7 mm of lip hypermobility when smiling), choose a material that is as cosmetic as possible.1 If the patient is not as driven by esthetics and the teeth are not too visible, it is more sensible to choose a more durable material - even though there may be a slight esthetic compromise.

Another consideration is whether the underlying color of the anterior teeth needs to be blocked or if the color is to be visible through the restoration. A material should be used with enough translucency to allow the natural color to shine through or enough opacity to block out unesthetic underlying chroma.

2.Occlusal Risk

When working up the patient's case, make sure to note any evidence of intra-articulator TMJ signs or symptoms, occlusal-muscle disorders, masticatory muscle soreness or fatigue (tension headaches), tooth wear, tooth mobility without periodontal breakdown, or tooth migration. These issues should be considered indicative of a high occlusal risk patient.2 Esthetic restorations may still be an option, but extra attention to detail is essential to develop an occlusal scheme that ensures a harmonious stomatognathic system - minimizing stress on the restoration.

3.Quantity of Remaining Enamel

One of the best reasons to preserve tooth structure during an adhesive procedure is to conserve a maximal amount of remaining enamel, since the crystalline structure of enamel is far less variable than dentin. Recent reviews of porcelain veneers during the past ten years suggest that, of the restorations that failed (4%), six of seven were only partially bonded to dentin.3 While the success rate shows the wonderful results of porcelain veneers, it also indicates a need to preserve as much enamel as possible.

4.Quantity and Quality of Remaining Dentin

Recent studies also look at how bonding to sclerotic and carious dentin can affect bond strength.4,5 While predictable bonding success is hard enough to obtain inside the mouth, it seems that bond strengths may also vary depending on the kind of dentin that exists. A good rule of thumb is to consider a traditional cemented restoration if areas of discolored dentin are present that lack sensitivity to cold water, air blast or to preparation without anesthesia. This evidence may indicate that the wet collagen network within the dentin has been significantly altered, affecting the necessary optimum bond strengths.

5.Ability to Maintain 100% Isolation

If 100% isolation cannot be obtained during an adhesive procedure, failure is imminent.6 Deep subgingival restorations, patients with limited openings (TMJ), or any area that is impossible to isolate are pure examples of clinical situations where traditionally cemented restorations may be indicated. Desire for Maximum Tooth Conservation
Generally, it is recommended to only remove the amount of tooth structure necessary to maximize esthetics, obtain the necessary retention and resistance form, and preserve remaining tooth structure.