Tooth-supported fixed bridges (using your natural teeth to support a dental bridge, not an implant) can last for a significant duration, often ranging from 5 to 15 years or even longer, with proper care. The lifespan depends on factors such as oral hygiene practices, diet, habits, and the quality of the bridge itself. Regular dental check-ups and maintenance play a crucial role in ensuring the longevity of the bridge. Over time, wear and tear might cause required adjustments or replacements, but with diligent care, a tooth-supported fixed bridge can provide functional and aesthetic benefits for many years.