SURFACE TREATMENT FOR CERAMIC RESTORATIONS

[drmithila]

 

Figure 1. The patient presented with no posterior disclusion or anterior guidance after orthodontic treatment. A prepless veneer was placed (tooth No. 6) to establish the proper function and to improve the aesthetics.

Figure 2. The internal surface of the silica-based ceramics (Willi Geller Creation [Creation International]) was etched with a 9% buffered hydrofluoric acid (Porcelain Etch [Ultradent Products]) for 2 minutes, rinsed, and air-dried (2a). An application of silane (Porcelain Bond Activator mixed with Clearfil SE Bond Primer [Kuraray]) was applied. Some manufacturers add a silane coupler to their bonding system that is mixed with the other components (eg, bonding agent/primer) during ceramic adhesion (2b). A clear translucent light-cure resin cement (Illusion [BISCO]) was applied to the internal surface of the veneer (2c).

Figure 3. Once the disinfectant step was completed, the enamel was etched using a 37.5% phosphoric acid (Gel Etchant [Kerr]). The gel was placed several mm beyond the anticipated restorative margin (3a). An adhesive agent (Optibond Solo Plus [Kerr]) was applied to the etched enamel, air-thinned, and light-cured for 40 seconds (3b). The veneer was positioned into place and the excess resin cement was removed using the "wet brush" technique and was light-cured for 40 seconds. It is important to leave a residual amount of resin cement at the interface to compensate for polymerization shrinkage (3c).

Figure 4. Function and aesthetics were improved using a noninvasive preparation-less  procedure.