![Applications](images/applications-header-img.jpg)
Provisional Bridge
Because Ribbond also bonds to acrylic and bis-acryl, it is commonly used for making reinforced provisional bridges. For longer-term bridges, multiple layers of Ribbond make a strong stress bearing laminate structure to act as a framework. For simple provisionals, one piece is commonly used to prevent cracks from propagating through the resin past the Ribbond. Although a crack may start, the Ribbond prevents catastrophic failure and maintains the integrity of the bridges.
![Provisional bridge](images/provisional-bridge.jpg)
Technique
Step 1
![Measure Ribbond](images/provisional001.jpg)
Measure distance between outsides of abutments.
Step 2
![Place composite](images/provisional002.jpg)
Place a thin layer of composite on preps for retention. Do not acid etch.
Step 3
![Wet Ribbond](images/provisional003.jpg)
Wet Ribbond with unfilled bonding resin.
Step 4
![Wetted fibers](images/provisional004.jpg)
Wetted Ribbond changes from white to translucent.
Step 5
![Place fibers](images/provisional005.jpg)
![Place fibers](images/provisional006.jpg)
Push Ribbond through composite, against the teeth, and polymerize. If using acrylic, wet polymerized Ribbond with monomer.
Keep Ribbond towards gingival region in pontic.
Step 6
![Confirm placement](images/provisional007.jpg)
Confirm placement of Ribbond within vacuum formed matrix.
Step 7
![Inject provisional composite](images/provisional008.jpg)
Inject provisional bridge composite gingival to Ribbond.
Step 8
![Place tray](images/provisional009.jpg)
Place loaded tray over abutments.
Step 9
![Confirm placement](images/provisional010.jpg)
Ribbond visible on occlusal surface of abutments.
Step 10
![Finished provisional bridge](images/provisional011.jpg)
Composite provisional bridge Finished