"Temporary" can mean two weeks — or fourteen months while a patient waits on a final. The resin you print or mill decides whether that provisional survives without fracturing, staining, or irritating the gingiva.
How long is "long-term"?
Provisionals are typically classed as <30 days (short) or 1–6 months (long-term). For stays beyond 30 days, choose a temporary resin with documented water sorption below 30 µg/mm³ and a flexural strength above 60 MPa, or the crown will craze at the margin.
Three failure modes and the fix
| Symptom | Cause | Fix |
|---|---|---|
| Marginal chipping | Poor layer adhesion | Raise exposure 10–15%, post-cure 20 min |
| Gingival redness | Monomer leach | Use medical-grade resin; rinse 2 min post-print |
| Staining at 6 weeks | Low colour stability | Pick a stabilised temporary resin |
See the full line-up in our temporary resin range, validated for up to 6-month wear and easy chairside polishing.
Chemistry that survives
Long-term temporary resins are built on UDMA or Bis-GMA matrices with low residual monomer. A resin with >2% unreacted monomer leaches by-products and stains fast; a 20–30 min post-cure drops residual monomer below 1%.
Polish-to-pass protocol
- Remove support marks with a 40 µm diamond, then silicon points.
- Apply a tissue-friendly glaze; a glossy surface cuts plaque retention roughly in half.
- Re-polish at each recall — matte margins harbour biofilm.
Recall schedule for stays beyond 3 months
| Month | Action |
|---|---|
| 1 | Check margin and occlusal contact |
| 3 | Re-polish and shade check |
| 6 | Assess for replacement |