Starting from scratch, is mandatory to program the case in wax, even as a protocol of daily basis. Wax is a material used by every technician from the start of its carrier and in the every day work.
Fig 1.- The initial case displays a misaligned upper arch, with loss of teeth substance and unpleasant aesthetics.
Fig 2.- Just by adding wax on the surface, we can see perfectly where the restorations will require minimal preparation and where it shall not be prepared at all.
With the composite materials, now-a-days is possible to determine a precise shape, try it on the patient with a mock-up, and replicate it exactly with this technique, pressing composite in a mold/muffle.
Fig 3.- This system is about a simple two pieces mold wich is used with the combination of transparent and laboratory silicone, it is useful for complex rehabilitations and even for simple restorations, and allow to reproduce the slightest details from the wax-up with extreme accuracy. The transparent components allow the composite to be polymerized while being pressed. (Tender Flask, Micerium)
Fig 4.- The laboratory technique, even in partial restorations allow to place several restorations in the same muffle, in order to be able to press the final enamel layer. In this image, the wax-up with the shape of the final volume is being duplicated.
Fig 5.- The internal volume of the teeth is stratified with the aid of silicon stents taken from the wax-up, in this stage, mammelons can be modeled and internal effects can be inserted. The restorations at this point are separated form each other with a fine diamond disk and placed into the muffle.
Fig 6.- After placing the veneers in the muffle, the enamel mass is placed on the impression and the muffle is screwed in order to have the composite pressed for 10 minutes, then polymerization is carried on.
Fig 7.- Every single restoration comes out from the mold with a very thin excess (0,1 mm) which is removed in an extremely easy way.
Fig 8.- After finishing and polishing the veneers are recovered from the plaster, they must be 30 minutes in a plaster solvent solution in ultrasonic bath.
Fig 9.- The restorations cemented, the clinical procedures will be explained further on in an upcoming article