A Problem-Solving Impression Technique
(Continued)3. The loaded tray was placed over the prepared teeth and the patient was instructed to close his teeth firmly together (Fig. 5). The material was allowed to set for 2 minutes.
 Figure 5. Impression material and tray placement over the prepared teeth. |
During the setting cycle, the impression material was border molded to the soft tissue using gentle finger pressure (Fig. 6).
 Figure 6. The impression material is border molded during the setting cycle. |
4. When the material was set, the patient was asked to open, and the impression was dislodged from the maxillary teeth, while allowing the impression to remain on the mandibular teeth. The impression was visually inspected for completeness (Fig. 7).
 Figure 7.The impression remains in the mouth on the arch opposite the prepared teeth. The base impression (Shore A Durometer 80) is visually inspected. Note the border molding of the base material. |
Although there was evidence of gingival bleeding indicating the field was not perfectly dry, the base material exhibited resistance to the moisture present.
5. With the patient's mouth open, the maxillary side of the impression was air dried.
A thoroughly dry field is essential to permit the subsequent wash material to laminate to the set impression material.
6. A slight amount of wash material was syringed into the impression of the prepared teeth (Fig. 8).
 Figure 8. The wash material (Shore A Durometer 40) is syringed onto the air dried impression of the prepared teeth. The impression remains in the mouth. |
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