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Related Experiment Videos

Periotest method: implant-supported framework fit evaluation in vivo

K B May1, B R Lang, B E Lang

  • 1Department of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, USA.

The Journal of Prosthetic Dentistry
|June 17, 1998
PubMed
Summary

This study found a weak correlation between laboratory laser measurements and the Periotest method for evaluating implant framework fit. Clinicians should use careful observation to detect misfit at the implant prosthodontic interface.

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Area of Science:

  • Dental Implantology
  • Prosthodontics
  • Biomaterials Science

Background:

  • Accurate framework fit is crucial in implant prosthodontics to prevent complications.
  • Microgaps between implant frameworks and abutments can go undetected until complications arise.
  • A reliable method for objectively evaluating implant prosthodontic interface fit is needed.

Purpose of the Study:

  • To determine the correlation between laboratory laser measurements of abutment analog-framework fit and intraoral fit assessed by the Periotest method.
  • To investigate the utility of laser videography and the Periotest method in quantifying framework fit.
  • To explore potential objective evaluation tools for implant prosthodontic fit.

Main Methods:

  • A clinical investigation involving 15 subjects with implant-supported fixed partial dentures.

Related Experiment Videos

  • Framework fit was measured in the laboratory using laser videography (six measurements).
  • Intraoral framework fit was quantified using the Periotest method; data analyzed via correlation and regression.

    • Main Results:

    • The overall correlation coefficient between laser measurement and Periotest was weak (r = 0.51).
    • Regression analysis indicated a significant intercept for laser videography measurements (p < 0.05).
    • Periotest values were negative (mean -7.3 ± 1.2), with variance explained by vertical (delta Z, +0.471) and XY plane misfits (X-YVD, -0.244).

    Conclusions:

    • No single laser measurement variable strongly correlated with the Periotest method for identifying misfit.
    • Weakly correlated laser misfit variables may be clinically observable with increased scrutiny.
    • Objective evaluation of implant framework fit requires further refinement beyond current laser and Periotest methods.