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Related Experiment Videos

Custom impression trays. Part II: Removal forces

D L Dixon1, L C Breeding, J P Moseley

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

The Journal of Prosthetic Dentistry
|March 1, 1994
PubMed
Summary
This summary is machine-generated.

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Removing dental impression trays requires understanding removal forces. Applying force at a single anterior point (224 N) is easier than even force application (514 N) for custom trays.

Area of Science:

  • Dental Materials Science
  • Biomechanical Engineering

Background:

  • Choosing custom impression trays necessitates understanding removal forces.
  • These forces are critical for tray design and patient comfort.
  • Existing dental literature lacks data on these specific forces.

Purpose of the Study:

  • To quantify the forces encountered during custom impression tray removal.
  • To compare two distinct tray-removal methodologies.
  • To provide data for optimizing custom tray design and clinical procedures.

Main Methods:

  • An in vitro study utilizing a polymethyl methacrylate custom tray.
  • Two methods of force application were tested: single anterior point and even distribution.
  • Force measurements were recorded during simulated impression removal.

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Main Results:

  • Force application at a single anterior point required significantly less force (224 N) compared to even force application around the tray (514 N).
  • This suggests a more efficient removal technique is possible with targeted force application.
  • The study provides quantitative data on removal forces for custom impression trays.

Conclusions:

  • Single-point anterior force application is a more efficient method for removing custom impression trays.
  • Understanding these biomechanical forces is crucial for improving dental impression techniques.
  • The findings will inform subsequent research on tray material selection and design.