Direct Intraoral Mockup as a Guide in Conservative Tooth Preparation for Porcelain Laminate Veneers
Ronaldo Hirata, DDS, MS, PhD • Oswaldo Scopin de Andrade, DDS, MS, PhD • Eliane Placido, DDS, PhD
Upon completing this case study, the reader should:
- Be better able to visualize the process of preparing and placing porcelain laminate veneers
- See how porcelain laminate veneers can be used to increase aesthetics in restorations
The recommended facial reduction for a porcelain laminate veneer is 0.5 mm to provide adequate stress resistance and space for the buildup of color. To avoid exposing dentin, this dimension must be determined with the preparations originating from the final volume of the restoration, since the mean thickness of enamel in the gingival third is approximately 0.3 mm to 0.4 mm. As the cervical area is critical, a diagnostic waxup on stone models during treatment planning is paramount and serves as a matrix for the fabrication of silicone indices that guide mockup, tooth preparation, and direct provisionalization.
A diagnostic template, directly fabricated using a bis-acrylic material on the silicone index, will guide tooth preparation. This procedure may also serve as a mockup: it is molded on the unprepared tooth surface and may be adjusted to accomplish the patient’s aesthetic expectations before tooth reduction. Accurate preparation can be accomplished following the thickness required for optimal restoration properties, and according to a conservative approach.
*Clinical Instructor, Restorative Dentistry, CETAO, São Paulo, Brazil; private practice, Curitiba, Brazil.
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