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Related Experiment Videos

Occlusal plane discrepancies generated by transverse horizontal axis deviations.

J F Bowley1, S M Morgano

  • 1Faculty of Dentistry, Kuwait University Health Sciences Center, Jabriya, Kuwait. johnbowley@hsc.kuniv.edu.kw

The Journal of Prosthetic Dentistry
|July 18, 2001
PubMed
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Deviations in mandibular axis during closure cause occlusal errors. These errors impact diagnostic planning and restoration accuracy, highlighting the need for precise articulator settings in dental procedures.

Area of Science:

  • Dental Mechanics
  • Occlusal Analysis
  • Biomechanical Modeling

Background:

  • Deviations from the patient's mandibular rotational axis during closure on an articulator can lead to occlusal discrepancies.
  • These discrepancies negatively impact diagnostic planning and the occlusal relationships of dental restorations.

Purpose of the Study:

  • To investigate the magnitude and types of occlusal errors resulting from discrepancies between the patient's transverse horizontal axis and the articulator's axle.
  • To quantify the impact of these axis deviations on mandibular plane orientation and occlusal relationships.

Main Methods:

  • A simplified monoplane model was used for diagrammatic analysis of transverse horizontal axis deviations.
  • Axis deviations of 5 mm were analyzed in eight different directions.

Related Experiment Videos

  • Geometric and trigonometric assessments quantified changes in mandibular plane orientation relative to the maxillary plane.

    • Main Results:

    • All tested axis deviations resulted in errors in mandibular plane orientation upon complete closure.
    • Angular malalignment between the mandibular and maxillary planes was observed.
    • Anterior-posterior shifting of the mandibular plane relative to the maxillary plane occurred.

    Conclusions:

    • Deviations from the true transverse horizontal axis on an articulator produce various planar shifting and angular discrepancies.
    • These findings underscore the critical importance of accurate articulator calibration for reliable occlusal analysis and treatment planning.