Crowns & Bridges6 min read
Five insertion-axis mistakes that turn a good bridge into a remake
Individual insertion axes, undercut handling and connector cross-sections: where multi-unit bridge designs quietly lose fit.
A bridge that will not seat is rarely a scanning problem. It is usually a compromise made in the design when abutment axes disagree.
The five
- Forcing one common axis across divergent abutments instead of blocking out intelligently.
- Blocking out undercuts so aggressively that retention disappears.
- Connector cross-sections below the material's safe minimum in the posterior.
- Ignoring the pontic tissue surface, which then traps and inflames.
- Uniform cement gaps applied to non-uniform preparations.
How we handle it
Every multi-unit case gets an explicit axis review, and where a compromise is unavoidable we flag it in the case thread with the options — segmenting the bridge, adjusting the preparation, or accepting a defined blockout.
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