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Updated: Aug 16, 2025

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A modified scan technique for multiple abutment teeth using the trim and lock function.

Marco Valenti1, Alessandro Valenti1, Davide Cortellini2

  • 1Private Practice, Via G. B. Damiani, 5, Pordenone 33170, Italy.

Journal of Dentistry
|December 25, 2022
PubMed
Summary
This summary is machine-generated.

This new digital scanning protocol uses software tools to scan multiple teeth separately. It simplifies full-arch intraoral scanning and improves treatment efficiency for complex dental cases.

Keywords:
Digital dentistryDigital impressionDigital toolGingival displacementIntraoral scanMulti-unit abutment

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Area of Science:

  • Digital dentistry
  • Intraoral scanning technology
  • Prosthodontics

Background:

  • Accurate digital impressions are crucial for complex dental restorations.
  • Scanning multiple abutment teeth presents challenges in managing gingival displacement and maintaining margin visibility.

Purpose of the Study:

  • To introduce a novel protocol for digital scanning of multiple abutment teeth.
  • To utilize specific software tools for improved intraoral scanning accuracy.

Main Methods:

  • A reverse workflow technique was employed with interim restorations in place.
  • Individual abutment teeth were scanned sequentially after trimming and locking adjacent teeth from the scan.
  • Gingival displacement was managed by removing retraction cord or interim restoration for only one tooth at a time.

Main Results:

  • The described technique simplifies the scanning of multiple abutment teeth.
  • The use of trim and lock software tools prevents gingival crevice closure.
  • Preparation margins remain visible and uncontaminated during the scanning process.

Conclusions:

  • Splitting scans for multiple abutment teeth enables reliable 3D acquisition of each finish line.
  • This technique simplifies full-arch intraoral scanning.
  • The protocol enhances overall treatment efficiency in complex restorative cases.