Written by Dr. Susan McMahon DMD, AAACD
With the development of ultra thin ceramics, and the subsequent onset of minimal prep restorations, we are diagnosing and prepping more veneers than ever before. There are several techniques for fabricating veneer prototypes and provisionalizing veneer preps. With minimal prep veneers, I prefer to utilize a Direct Light Cured Injected Composite Technique.
An esthetic wax up is made from a diagnostic model. Futar Clear Fast Bite Registration is used to create a matrix. I choose Futar Clear Fast because it has a firm set but is elastic enough to come off the cast without disturbing the wax up. Clear Fast also remains clear enough to have direct visualization of the preps through the matrix so it can be used as a prep guide as well as to fabricate the provisionals.
Futar Clear Bite is placed in a disposable tray without adhesive over the diagnostic wax-up, to create a matrix for temporization of the preparations. To maximize a snug adaptation of the matrix, a small ditch can be cut with a #4 round bur along the gingival margin on the model. Figures 1. 2
The Futar Clear Bite is removed from the tray and a hole is drilled at the mid-incisal on the facial edge. Figure 3.
The mid-facial of each of the prepared teeth is spot etched in the center of the tooth. Permquik Bond Resin, Ultradent, is applied to the enamel to seal the surface and bond to the etched spot. Figure 4.
The matrix is placed on the prepared teeth and flowable composite is injected into the incisal holes. Pressure is applied to hold the matrix tightly against the gingiva. Figure 5.6 The composite is cured through the clear matrix. Figure 7 The matrix is removed and the composite provisionals are finished and polished. Figures 8,9