crown and bridge impression slides
TRANSCRIPT
![Page 1: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/1.jpg)
Crown And Bridge Impression
![Page 2: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/2.jpg)
Teeth are prepared for bridge
Notice the shape of the preps. Room must be left to accommodate the restoration.
![Page 3: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/3.jpg)
Hemostatic solution is utilize to control bleeding
Cords are soaked in the solution before placement. Some cords are already impregnated with hemostatic solution eliminating this step.
Plain
Braided
![Page 4: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/4.jpg)
Cord is “packed” inserted into the sulcus of the prepared teeth
The cord displaces the gingiva for the light body impression material can easily flow into the sulcus. The cord comes in diameter sizes 000 thru 3. Sometimes 2 cords are need in this step.
![Page 5: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/5.jpg)
The final impression is taken by the dentist.
In this example a triple tray is used
Intraoral and mixing tip
Light body cartridge and mixing gun
Heavy body Putty
Triple tray with tray adhesive
![Page 6: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/6.jpg)
If a triple tray is not used, three separate procedures must be performed:
• Take an impression of the prepared teeth
• Take an impression of the opposing arch
• Take a bite registration
![Page 7: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/7.jpg)
Light body impression material applied to the prepared to teeth to capture detail.
This material is less viscous and “wets the surfaces of the preps better.
![Page 8: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/8.jpg)
Heavy body material is placed in the tray and then placed over the light body material to form the impression
The heavy material provides stability to the impression for better accuracy.
![Page 9: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/9.jpg)
The patient bites into the impression material until set. Approx. 4-5 min.
Notice the impression material did not cover the dentition on the Mx arch. This impression may have to be retaken or and additional impression of the opposing arch will be needed.
![Page 10: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/10.jpg)
Both the light and heavy body material come together to form a unified impression
Notice the sharp detail of the margin in this impression vs. the impression below.
If the detail is not accurate the impression may be reused to capture the detail. This is know as a “Wash”
After disinfection, the impression is sent to the lab with the RX.
![Page 11: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/11.jpg)
A temporary is made of acrylic or resin material
Crowns can be made of acrylic, resin or preformed shells
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Removing cement
Popular temporary cement
Temporary bridge cemented into place until “permanent” bridge is completed in the lab to maintain occlusion
![Page 13: Crown and bridge impression slides](https://reader034.vdocuments.net/reader034/viewer/2022052412/55869232d8b42ac6068b4623/html5/thumbnails/13.jpg)
Bridge on a laboratory cast
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Digital impressions replacing impression materials