“Alternative technique for the provisionalization of veneer preparation”
Alejandro Sanchez-Lara Murguía , Konstantinos Chochlidakis
Department of Prosthodontics, Eastman Institute for Oral Health , University of Rochester
Provisionalizing veneer cases is challenging due to the lack of mechanical retention and thickness of material. The following technique describes an esthetic and more predictable technique for the fabrication of interim restorations in veneer cases .
A clear thermoplastic vacuum custom tray is fabricated out of the diagnostic wax-up model . Clear Polyvinyl Siloxane (PVS) material is used to take impression of diagnostic wax-up. Small holes are drill in incisal edge through the clear polivinyl siloxane impression to allow the injection of flowable composite when seated intraorally. Composite is light cured from different angles through the clear matrix before removal.
This technique allows high quality and esthetic interim restorations that may function as a means of communication, regarding the function and esthetics of a restoration between patient, dentist, and dental technician out of a translucent matrix and injectable flowable composite.
1.Pre-operative photograph of patient with existing restorations. (Fig 1-2)
2.Duplicate cast of esthetic wax-up. (Fig 3)
3.Laboratory condensation silicon is used as spacer for impression material and can be used as tooth-reduction guide to prepare the dentition as conservatively as possible. (Fig 4-7)
4.A clear .5mm plastic matrix is thermoformed over the cast with the condensation silicon to create a custom tray.
5.The tray is filled with clear PVS to impress diagnostic wax-up. (Fig 8-10)
6.Holes located in the incisal edge are drilled through the PVS clear matrix to allow insertion of flowable composite compule tip for injection. (Fig 11-13)
7.Once composite is injected, light curing is done through the clear PVS matrix. (Fig 14)
8.Excess material is trimmed and occlusal adjustments are done (Fig 15)
9.Composite material is polished with silicon polishers and polishing discs to obtain optimal polishing and luster. (Fig 16)