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Related Experiment Videos

Reliability of a facebow transfer procedure.

J F Bowley1, G C Michaels, T W Lai

  • 1Ohio State University, College of Dentistry, Columbus.

The Journal of Prosthetic Dentistry
|April 1, 1992
PubMed
Summary
This summary is machine-generated.

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Maxillary cast mounting accuracy using a simulated-kinematic facebow transfer varied between trials. Mounting errors, influenced by instrument settings, are expected during clinical use of this dental device.

Area of Science:

  • Dental prosthetics
  • Maxillofacial prosthetics
  • Occlusion and temporomandibular disorders

Background:

  • Accurate maxillary cast mounting is crucial for fabricating dental prostheses.
  • Simulated-kinematic facebow transfers are used to record maxillomandibular relationships.
  • Variability in facebow transfer procedures can impact prosthetic outcomes.

Purpose of the Study:

  • To evaluate the three-dimensional orientation accuracy of maxillary cast mounting using a simulated-kinematic facebow transfer.
  • To assess the influence of operator resets and instrument settings on mounting consistency.

Main Methods:

  • Three operators performed multiple simulated-kinematic facebow transfers on a single subject.
  • Anterior and posterior facial reference points were marked.

Related Experiment Videos

  • Maxillary cast coordinates were measured using a machinist microscope after each transfer.
  • Control trials with no facebow component resetting were included.

    • Main Results:

    • A range of differences in maxillary cast mountings was observed across all tested methods.
    • Variability was attributed to the setting of the simulated-kinematic facebow instrument.
    • Mounting errors were found to be consistent with expected clinical variability.

    Conclusions:

    • The simulated-kinematic facebow transfer exhibits variability in maxillary cast mounting accuracy.
    • Instrument setting is a significant factor contributing to mounting errors.
    • Clinicians should anticipate and account for these potential errors in routine practice.