Visio.lign Veneering System for Hybrid Overdentures

Over the years, more and more bridge and implant cases have been restored with zirconia and all-porcelain occlusions. This will sometimes result in delaminating between porcelain and zirconia, as well as increased stress to implants from high bite impact.

It can be very difficult for the restorative dentist to repair chips, break-offs, and delamination in the oral environment. Dentists and technicians can also experience problems with traditional implant-restorations, such as teeth breaking loose or even composite teeth snapping in half. These mishaps may be the result of technicians grinding denture teeth into a thin shell to accommodate the space over the implant-frame.

What many cases require is a thin veneer denture tooth that looks natural and maintains high flexibility and color. This industry-need motivated Bredent GmbH Germany to create the Visio.lign system, with includes a ceramic nano-filled PMMA tooth that has the wear factor and flexibility needed for today’s high esthetic cases.

It is important to note that Visio.lign is a complete system, and for best results it is recommended that users use the system in its entirety. The Visio.lign components include: Novo.lign veneers, Neo.lign full denture teeth, Combo.lign opaquer (suitable for metal primers and silanizing techniques), Combo.lign light and dual-curing luting composite, Visio.link light curing PMMA and composite primer, and Crea.lign veneering material with nano-ceramic fillers.

The Visio.lign System has many applications, including composite inlays/onlays, partials, veneering of metal/zirconia bridges, and implant applications. Or, as in the case shown in this article, an attachment or screw-retained removable implant case.

When planning a Visio.lign case, one must first select the correct veneering teeth, mold size, and shades (Figure 1). There may be a need to adjust the veneers by grinding them with a carbide bur. Once selected, the initial veneer setup is tried in the patient’s mouth to ensure proper fit.

After try-in, the technician created a silicone matrix for the set up. This silicone key will be used to reposition the veneers in a later step (Figure 2). After creating the matrix, the technician opened a small window and filled the opening with Visio.Sil, which will help to ensure that the luting material is adequately cured (Figure 3 through Figure 5).

After curing, the technician removed the veneers from the silicone key and used steam to remove any silicone or wax residue. Then, the veneers were sandblasted (110 microns at a pressure of 2.5-3.5 bars) to prepare for better bonding (Figure 6).

Once the veneers were prepped, the technician applied a fine coat of Visio.link Primer evenly over their surface before curing the primer with a curing light. Please note that LED devices without UVA rays are not suitable for this step.

For the framework, technicians should prime with MKZ primer. Once the primer set, the technician opaqued the framework using the Combo.lign opaquers. After tbe opaquing was completed, the veneers were checked against the index for accuracy (Figure 7).

In the next step, Combo.lign was applied to the veneers to achieve maximum adhesion to the framework. The author recommends that technicians use caution and take care not to move or shift the veneers during the bonding/polymerization stage.

Using a light-curing hand lamp, the technician cured the Combo.lign for the intermediate polymerization or fixation of the material layers. It is recommended to polymerize the application for 180 seconds (Figure 8).

For the next step, he applied Crea.lign dentine around the contour of the veneer, especially at the cervical and interproximal areas where plaque is more prone to accumulate (Figure 9). In this case, Crea.lign was used as filler composite, as it is resistant to plaque and abrasion and can be polished to a high luster. Once applied, it must be cured for 180 seconds.

After curing, the technician reduced excess material using a Tungsten Carbide bur. A diamond coated rotary tool will cause irreversible roughness on the surface and it is not recommended. Once polished, the technician modeled the anterior lingual according to the bite to ensure accuracy (Figure 10).

The technician applied Visio.Link to the area where Crea.lign gum was to be added. He cured the material for approximately 180 seconds. He then applied the gum material and created the gingival areas, curing the Crea.lign for approximately 120-240 seconds, depending on the machine used and the amount of Crea.lign applied (Figure 11). Once the gum was cured, it was polished using a soft brush (Figure 12). Polishing paste and a soft cotton or leather buff were used for final polishing.

The perfect surface finish ensured resistance to plaque and shade stability (Figure 13).

Disclaimer: The preceding material was provided by the manufacturer. The statements and opinions contained therein are solely those of the manufacturer and not of the editors, publisher, or the Editorial Board of Inside Dental Technology.

For more information, contact:
XPdent Corporation
P 877-328-3965
W www.xpdent.com