Dental bridges are cemented onto the abutment teeth (the teeth adjacent to the gap) using a strong dental adhesive, often referred to as dental cement.
Here's a breakdown of the process:
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Preparation of Abutment Teeth: The abutment teeth, which will support the bridge, are prepared similar to how teeth are prepared for crowns. This involves reshaping the teeth so the bridge can fit securely over them.
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Bridge Placement and Fit Verification: The dental bridge, fabricated in a dental laboratory, is placed over the prepared abutment teeth. The dentist meticulously checks the fit, bite, and aesthetics. Adjustments are made if needed to ensure optimal comfort and function.
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Cementation:
- Cleaning and Drying: The abutment teeth and the inside of the bridge are thoroughly cleaned and dried. This step is crucial for proper cement adhesion.
- Applying the Cement: The dental cement is applied to the inside of the bridge's crowns (the parts that fit over the abutment teeth).
- Seating the Bridge: The bridge is carefully seated onto the prepared abutment teeth, ensuring it's fully in place.
- Removing Excess Cement: Excess cement that squeezes out from under the bridge is removed carefully to prevent irritation to the gums.
- Curing the Cement: Many modern dental cements are light-cured, meaning a special blue light is used to harden (cure) the cement. Other cements are self-curing or dual-cured (both self-curing and light-curing). The curing process ensures the cement sets completely, creating a strong bond between the bridge and the abutment teeth.
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Final Adjustments: After the cement has set, the dentist checks the bite again and makes any necessary adjustments to ensure proper occlusion (how the teeth come together).
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Polishing: The margins (edges) of the cemented bridge are polished to create a smooth, seamless transition between the bridge and the natural teeth.
The type of dental cement used can vary depending on the materials of the bridge and the dentist's preference. Common types of dental cement include:
- Resin cements: These are very strong and aesthetically pleasing, often used for porcelain or ceramic bridges.
- Glass ionomer cements: These release fluoride, which can help protect the abutment teeth from decay.
- Zinc phosphate cements: A traditional cement with a long history of use in dentistry.
- Resin-modified glass ionomer cements (RMGIs): Combine the benefits of both resin and glass ionomer cements.
The longevity of a cemented dental bridge depends on various factors, including oral hygiene, diet, and the health of the abutment teeth. Regular dental checkups and proper oral hygiene practices are essential for maintaining the bridge and the surrounding teeth.
