After making the triple tray reline impression, an assistant may also need to make a bite registration.
When assisted by a knowledgeable dental assistant, a dentist performing triple tray procedures may only need to anesthetize the patient and prepare the crown and bridge abutment/s.
If the occlusion reference points are not present or are not obvious, such as if preparing a bridge where there would be no unprepared posterior tooth distal to the bridge abutments, or if a single triple tray impression will not capture all abutment teeth, then two separate impressions of the arches should be made.
After the tooth is prepared, the assistant will fill this impression tray with low--viscosity VPS and the dentist will seat this relined triple tray intra--orally to take a final impression to capture the abutment details.
Typically, equal lengths of each material are dispensed so that the total amount of impression material that will be mixed will fill the triple tray. A wide hand spatula is used to mix the two components by smearing the components together and then using the edge of the spatula to plow the impression material into a pile, followed by smearing the material again into the pad surface.
This cartridge provides enough impression material for multiple triple tray fillings.
Prior to placing the triple tray, the assistant observes the patient's natural occlusion without the triple tray in place to see how the patient's teeth mesh together in maximum inter-cuspation.
After making an anterior pre-operative triple tray impression, the assistant rinses the tray in water to remove saliva, blood and other protein material.
Mamoun and dental assistant Javaid will discuss provisional restoration fabrication in more detail, making final triple tray impressions, filling out laboratory slips and packaging cases, cementing provisional restorations, and the special topic of malting impressions for round-house crown and bridge cases.]