It is critical to use tray material and wash from the same manufacturer as they are chemically designed to work together. This will ensure the catalyst and the base flow equally, avoiding issues with mixing. Bleed the cartridge before attaching the automix tip when working with cartridge materials. It’s more common to get streaking with hand-mixed putty materials, and hand-mixed materials should be kneaded quickly to ensure consistent color. When impression material is combined correctly, the color is uniform and without streaks. It is helpful to provide a separate occlusal registration using rigid vinyl polysiloxane (VPS) material because wax bites tend to be less stable during transportation. Also, it allows the patient to feel what they need to do and will help ensure they bite down correctly during the actual impression taking. This will provide you with a good idea of how the occlusion should look while taking the impression. When sizing a dual-arch tray, check the opposite side of the arch as the patient bites down on the empty tray. Plastic trays can be modified using an alcohol torch to heat the plastic, adapting the flanges to fit the patient.ĭual-arch trays (triple trays) come in various widths, and it’s best to keep a selection in stock. Metal trays are modifiable and may be widened in the posterior regions, but modifications to the anterior portion of metal trays are trickier. When selecting a tray, make sure it is long enough to capture the entire arch and wide enough to allow adequate tray seating. The arch shape of trays varies according to the manufacturer, as some are more square while others are more rounded. Once the impression is made, the tray should not show through.įull arch trays are available in several sizes. It should be large enough to cover all the teeth without contacting the soft tissues. The tray selected must capture the necessary information without distortion. The most common dental impression errors include: If the work goes ahead, there is an increased risk of spending precious chair-side time adjusting it, or it might need to be remade entirely. Otherwise, work may be delayed if the impression is rejected. Before sending the impression to the lab, potential dental impression errors should be identified. An excellent quality dental impression is critical because the dental lab cannot fabricate accurate, well-fitting restorations without it.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |