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Modified Provisional Technique: A New Prosthetic Approach for Stable Gingival Displacement to Make Impression.

Maurizio De Stefano1, Mario Papa1, Antonio Rupe1

  • 1Department of Medicine, Surgery and Dentistry, University of Salerno, 84084, Salerno, Italy, unisa.it.

International Journal of Dentistry
|March 2, 2026
PubMed
Summary

This study presents a novel prosthetic technique using modified provisional restorations for improved dental impressions. This method enhances gingival displacement, ensuring accurate subgingival preparation capture and reducing chairside time.

Keywords:
digital impressiongingival displacementprosthetic technique

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Area of Science:

  • Dentistry
  • Prosthodontics
  • Dental Materials

Background:

  • Subgingival preparation impressioning in full-mouth rehabilitation is challenging due to bleeding and gingival displacement issues.
  • Conventional methods using gingival cords and astringents have limitations in maintaining sulcus opening for accurate scanning.
  • Gingival sulcus reversion post-cord removal hinders subgingival preparation detection, necessitating software workarounds.

Purpose of the Study:

  • To introduce a modified provisional restoration technique for improved dental impression making.
  • To enhance gingival displacement and ensure accurate capture of subgingival preparation in full-arch cases.
  • To reduce challenges associated with conventional impression techniques in full-mouth rehabilitation.

Main Methods:

  • Utilized modified provisional restorations with specific marginal designs.
  • Employed the provisional restoration removal to achieve stable gingival displacement, exposing the preparation zone.
  • Performed immediate full-arch digital scanning without gingival cords or anesthesia.

Main Results:

  • Achieved stable, non-bleeding gingival displacement lasting beyond 5 minutes after provisional restoration removal.
  • Enabled immediate, uninterrupted full-arch digital scanning of subgingival preparations.
  • Eliminated the need for cords and anesthesia, reducing scan time and procedural complications.

Conclusions:

  • The modified provisional restoration technique offers a predictable and efficient method for subgingival preparation impressioning.
  • This approach improves patient compliance and reduces chairside time in full-mouth rehabilitation cases.
  • It overcomes limitations of conventional retraction methods, ensuring precise digital impression capture.