Which scenario favors a posterior implant-supported crown over a fixed bridge?

• A. Very short expected lifespan of adjacent teeth.
• B. Preference for a reversible option.
• C. Need for tooth-colored restoration compatibility.
• D. Sufficient bone for implant and intact adjacent tooth structure.

Answer: (D)

When there’s enough bone to place an implant and the adjacent teeth are healthy and intact, an implant-supported crown in the back of the mouth is the better choice. This setup replaces the missing tooth without altering the neighboring teeth, so you don’t have to prepare or crown those adjacent teeth just to bridge the gap. That preservation of natural tooth structure reduces the risk of future caries, pulp issues, or fracture in the abutment teeth.

An implant crown also distributes bite forces directly to the bone through the implant, avoiding extra stress on neighboring teeth that a fixed bridge can impose since a bridge relies on prepared adjacent teeth as supports. In the posterior region, where chewing forces are high, this can mean better long-term stability and fewer problems with the abutment teeth.

If bone is adequate and the adjacent teeth are sound, these advantages—preservation of adjacent teeth, reduced risk to them, and favorable load transfer—make an implant-supported crown the preferred approach.