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Two-stage impression technique for overdentures.

K C White1, D L Ramus

  • 1Department of Restorative Dentistry, University of Alabama, School of Dentistry, Birmingham.

The Journal of Prosthetic Dentistry
|April 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study introduces a two-stage impression technique for overdentures, improving load distribution between hard and resilient tissues. This method minimizes the need for extensive denture base adjustments after fabrication.

Area of Science:

  • Dental Prosthodontics
  • Biomaterials Science

Background:

  • Overdentures rely on both hard and resilient tissues for support.
  • Achieving optimal functional load distribution between these distinct tissue types presents a significant clinical challenge.

Purpose of the Study:

  • To present a novel two-stage impression technique for overdenture fabrication.
  • To reduce the necessity for post-fabrication denture base modifications.

Main Methods:

  • A mucostatic metal base is fabricated from a first impression capturing the resting soft tissue form.
  • A second impression is made under occlusal load using modeling compound on the metal base, establishing border seal and relating tissue displacement to abutments.
  • A final cast is created using the metal base and modeling compound, onto which heat-cured acrylic resin is processed.

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Main Results:

  • The proposed technique facilitates the creation of an overdenture base with improved tissue adaptation.
  • It minimizes the need for adjustments to the tissue surface, limiting them to specific areas like free marginal gingivae and abutment axial surfaces.

Conclusions:

  • The two-stage impression technique offers a predictable method for fabricating overdentures.
  • This approach enhances the functional load distribution and fit of overdentures, potentially improving patient outcomes and reducing chair time.