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April 6, 2009 | Web Exclusive


Pressing prominence

 

Working with a matrix to speed and conform pressing procedures, Keith Miolen, Technical Director at Craftsman Dental Laboratory (www.craftsmandentallabny.com), fabricates an esthetic zone series of veneers using Pentron’s Press•tige pressable ceramic.

1. The pre-op photo shows anterior teeth that are misshapen with undesired diastemas and irregular incisal edge contours due to wear. Pre-op photos also aid in crown lengthening and color of natural dentition (Figs. 1 and 2).

2. The clinician suppliers full-arch impressions of both maxillary and mandibular arches so the patient’s function can be accurately recorded once mounted (Fig. 3).

3. The models are poured and articulated with an articulator capable of making condyle-reproducing movements (Fig. 4).

4. The preliminary contours are made to the model (Fig. 5) and the matrix is formed around the maxillary arch (Fig. 6). The purpose of the matrix is to provide a mold so the case can be injected. Instead of each veneers being individually waxed with a typical waxing instrument, injecting is much more productive.

5. An eyedropper is then heated and used to inject liquefied wax into the matrix (Figs. 7 and 8).

6. After the wax cools, the matrix is removed and the individual veneers are separated using a thin, flexible razor (Fig. 9).

7. The waxup is evaluated by each arch form, plane of occlusion, and symmetry of crown length and widths. The margins then are sealed on each of the veneers (Figs. 10, 11, and 12).

8. The veneers are sprued (Fig. 13), invested, then pressed (Fig. 14).

9. The pressed veneers are placed on the model to check for fit (Fig. 15).

10. The sprues are cut off and the symmetrical lengths of the central are established based on a correct functional path (Fig. 16).

11. The surface textures are established prior to basic stain-and-glaze procedures (Figs. 17 and 18).

12. The finished veneers are returned to the clinician for seating (Figs. 19, 20, and 21).

Fig. 1	Fig. 2
Fig. 3	Fig. 4
Fig. 5	Fig. 6
Fig. 7	Fig. 8
Fig. 9	Fig. 10
Fig. 11	Fig. 12
Fig. 13	Fig. 14
Fig. 15	Fig. 16
Fig. 17	Fig. 18
Fig. 19
Fig. 20	Fig. 21