A traditional bridge is anchored in place using crowns attached to the teeth on either side of the gap. These bridges are often constructed of porcelain fused to metal, and are designed to match your nearby teeth so that your smile looks natural. A traditional dental bridge can last many years, though at some point it will need to be replaced because of normal wear and tear.
Meanwhile, implant-supported bridges are held in place by titanium posts that are surgically implanted in the jaw. Dental implants serve as replacement tooth roots. An implant-supported bridge can restore your ability to chew and speak comfortably, but like a traditional bridge, it will need to be replaced eventually. The implants themselves can last the rest of your life with proper care.
Implant-supported bridges are widely considered the gold standard in tooth replacement because they prevent jawbone recession and require no alteration of healthy teeth.