Dental bridges are not considered permanent, but they can last for many years with proper care and maintenance. The lifespan of a dental bridge depends on various factors such as oral hygiene practices, the strength of the supporting teeth or implants, and regular dental check-ups. On average, dental bridges can last between 5 to 15 years. Over time, the bridge may need to be replaced or repaired due to wear and tear, natural tooth movement, or changes in the surrounding teeth or gums. Regular dental care and good oral hygiene can help prolong the lifespan of a dental bridge.