What Are Fixed Bridges and How Do They Work?

Losing a tooth can significantly impact daily life, affecting everything from eating and speaking to overall self-confidence. Fortunately, fixed bridges offer a common and effective solution for replacing missing teeth. These non-removable dental prosthetics are designed to restore the function and appearance of your smile, helping to maintain oral health and facial structure.

Understanding Fixed Bridges

A fixed bridge is a permanent dental restoration that literally “bridges” the gap created by one or more missing teeth. It consists of artificial teeth, called pontics, which are securely held in place by crowns attached to the natural teeth on either side of the gap, known as abutment teeth. These abutment teeth are prepared to receive the crowns, which then provide stable support for the pontic.

Bridge materials are chosen for durability and aesthetics, ensuring the bridge blends seamlessly with existing teeth. Common options include porcelain, ceramics, and metal alloys. Porcelain and ceramic mimic the natural appearance of tooth enamel, especially in visible areas. Metal alloys, like gold, are used for structural framework due to their strength. Porcelain-fused-to-metal (PFM) bridges combine metal strength with porcelain’s natural look, while zirconia, a ceramic, also offers exceptional strength and aesthetic appeal.

Reasons for a Fixed Bridge

Missing teeth can lead to a range of issues that affect oral health and overall well-being. Functionally, the absence of teeth can make chewing difficult and may even lead to speech impediments, affecting pronunciation and communication. A fixed bridge restores the ability to chew properly and helps in clear speech.

Beyond functional concerns, missing teeth can create aesthetic problems, such as noticeable gaps and a sunken facial appearance due to lack of support. Fixed bridges fill these gaps, enhancing the smile and helping to maintain facial shape and volume. Structurally, leaving a gap can cause adjacent teeth to shift into the empty space, leading to misalignment and bite problems. This shifting can also increase the risk of tooth decay and gum disease, as misaligned teeth are harder to clean. Fixed bridges prevent this movement, preserving proper tooth alignment and distributing bite forces evenly.

The Process of Getting a Bridge

Getting a fixed bridge begins with an initial consultation and examination. During this appointment, a dentist assesses oral health, often using X-rays, to determine if a bridge is the appropriate solution. The dentist also discusses available options and creates a personalized treatment plan.

Once a bridge is deemed suitable, the abutment teeth are prepared. This involves reshaping these natural teeth by removing enamel to create space for the crowns that will anchor the bridge. After preparation, impressions are taken to create a precise model for the custom bridge. This model is then sent to a dental laboratory where the permanent bridge, including the pontic and crowns, is fabricated to match the natural teeth in color and appearance.

While the permanent bridge is being crafted, a temporary bridge is often placed. This temporary prosthetic protects the prepared abutment teeth, maintains the alignment of surrounding teeth, and preserves aesthetics and function during the waiting period, which can last a few weeks. Once the permanent bridge is ready, the patient returns for a final fitting where the temporary bridge is removed. The permanent bridge is then adjusted for proper fit, appearance, and bite, and once satisfactory, it is permanently cemented into place. Follow-up appointments may be scheduled to ensure comfort and proper function.

Caring for Your Fixed Bridge

Maintaining a fixed bridge requires consistent daily oral hygiene to ensure its longevity and to protect the supporting natural teeth and gums. Regular brushing, at least twice a day, with a soft-bristled toothbrush and non-abrasive toothpaste is important. Flossing is also crucial, but it requires special tools since traditional floss cannot pass through the solid bridge structure.

Specialized tools like floss threaders or interdental brushes are used to clean beneath the pontic and around the abutment teeth, removing food particles and plaque. Water flossers also provide an effective way to clean tight spaces around the bridge. Regular dental check-ups and professional cleanings are necessary to monitor the condition of the bridge and address any potential issues early.

Dietary considerations also play a role in extending the life of a fixed bridge. Avoiding very hard or sticky foods, such as nuts or caramel, helps prevent damage or dislodgement of the bridge. A fixed bridge can last many years, typically 5 to 15, with its lifespan influenced by materials, oral hygiene, and regular dental care.