How does a Bridge Work?

Fixed bridges, or non-removable bridges, are designed to replace missing teeth in a fashion that most closely resembles the natural state.

Technically they are similar to individual crowns attached together in a series. Similarly, the procedures to fabricate fixed bridges are virtually identical to individual crowns, although somewhat more extensive. The final result will closely mimic the look and feel of natural teeth.

Construction of Fixed Bridges

• Diagnosis: Determination of number and health of support teeth, including periodontal (gum) status, mobility (looseness), cosmetic implications, occlusion (“bite”), and other factors. The number of support teeth will vary depending on the diagnosis. Teeth with supporting bone loss due to periodontal disease are less able to accept the added load that fixed bridges create. As a result, more support teeth may be needed if periodontal disease has been a problem.
• Preparation and impressions: The teeth that will support the bridge are first shaped and refined. Then an impression (mould) is made of the teeth, as well as the adjacent teeth and the teeth of the other jaw. These impressions are used to construct models of the prepared teeth, and are used in the laboratory during fabrication of the bridge.
• Temporisation: Temporary fixed bridgework is usually fabricated to stabilize support teeth, provide for effective function and give a reasonable appearance.
• Evaluation: It is common to evaluate bridgework in its various stages of fabrication. This enables detailed verification of correct fit prior to finalising the aesthetic ceramic layer. Additionally, the ceramic layer may be evaluated for correct occlusion (bite) prior to the application of final colour and shading.
• Cementation: Final evaluation and placement of the non-removable bridge.