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Related Experiment Videos

Potential errors when using a computerized pantograph.

R B Price1, J D Gerrow, W C Ramier

  • 1Department of Restorative Dentistry, Dalhousie University, Faculty of Dentistry, Halifax, N.S., Canada.

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

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Using the terminal hinge axis for pantograph orientation results in small, statistically significant differences in articulator settings compared to an arbitrary hinge axis. Precise recording of reference plane and clutch angles is crucial for accurate dental articulator settings.

Area of Science:

  • Dental Mechanics
  • Biomechanical Engineering
  • Prosthodontics

Background:

  • Accurate jaw relation records are essential for complete denture fabrication.
  • Computerized pantographs aid in capturing dynamic jaw movements.
  • The choice of posterior reference point (hinge axis) can influence articulator settings.

Purpose of the Study:

  • To compare articulator settings derived from terminal hinge axis versus arbitrary hinge axis in pantographic recordings.
  • To evaluate the impact of errors in reference plane and clutch angle measurements on articulator settings.

Main Methods:

  • Pantographic recordings were performed on two subjects using both terminal and arbitrary hinge axis methods (30 trials each).
  • One subject underwent pantography with varied reference plane and clutch angle settings (18 occasions).

Related Experiment Videos

  • Statistical analysis was used to compare articulator settings and assess the effect of angle variations.

    • Main Results:

    • Statistically significant differences were observed between articulator settings obtained using arbitrary versus terminal hinge axes, though the magnitude of the difference was small.
    • A 1-degree change in reference plane angle resulted in approximately a 0.9-degree change in protrusive and orbiting path settings.
    • A 1-degree change in clutch angle resulted in approximately a 0.9-degree change in progressive side shift settings.

    Conclusions:

    • The terminal hinge axis is recommended as the posterior reference point for pantographic recordings.
    • Careful and accurate recording of the reference plane angle and clutch angle is critical for reliable articulator settings in dental procedures.