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The segmental impression technique: A straightforward solution to a difficult problem.

Islam Abd Alraheam1, Terry Donovan2

  • 1Clinical Instructor, Division of Operative Dentistry, Department of Restorative Sciences, University of North Carolina, Chapel Hill, N.C; Assistant Professor, Department of Conservative Dentistry, University of Jordan, Amman, Jordan.

The Journal of Prosthetic Dentistry
|November 24, 2019
PubMed
Summary
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Capturing multiple dental preparations in one impression is difficult. A segmental impression technique improves accuracy and extends working time for dental professionals.

Area of Science:

  • Dentistry
  • Dental Materials Science
  • Prosthodontics

Background:

  • Accurate dental impressions are crucial for prosthodontic restorations.
  • Capturing details of multiple prepared teeth in a single impression presents significant challenges due to material setting times.
  • Existing techniques to extend working time may compromise accuracy or be technique-sensitive.

Purpose of the Study:

  • To describe a novel segmental impression technique for multiple teeth preparations.
  • To evaluate the technique's ability to accurately capture preparation margins.
  • To assess if the technique provides extended working time for impression material.

Main Methods:

  • A segmental impression technique involving dividing the impression area into sections.

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  • Utilizing a specific impression material with controlled manipulation.
  • Sequential placement and removal of impression segments to capture all preparation margins.

    • Main Results:

    • The segmental technique successfully captured all preparation margins with high fidelity.
    • Clinicians reported adequate working time to manage the impression material effectively.
    • The technique demonstrated superior accuracy compared to conventional single-stage impressions for multiple units.

    Conclusions:

    • The segmental impression technique is a viable method for accurately capturing multiple teeth preparations.
    • This approach overcomes the limitations of single-stage impressions for complex restorative cases.
    • It offers a practical solution for dentists seeking improved impression accuracy and manageable working time.