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Related Experiment Videos

Reliability of fully adjustable, articulators using a computerized analysis.

H E Ebel, S E Guyer, W Lefkowitz

    The Journal of Prosthetic Dentistry
    |June 1, 1976
    PubMed
    Summary
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    The Denar D5A and Hanau 130-21 articulators showed no significant differences in reproducing jaw motion for five subjects. Both devices accurately replicated individual functional jaw movements and Gothic arch angles.

    Area of Science:

    • Dental Mechanics
    • Biomechanics
    • Prosthodontics

    Background:

    • Articulators are essential tools in prosthodontics for simulating mandibular movements.
    • Accurate reproduction of jaw motion is crucial for successful dental restorations.
    • Comparing the precision of different articulators, such as the Denar D5A and Hanau 130-21, is important for clinical application.

    Purpose of the Study:

    • To statistically compare the accuracy of the Denar D5A and Hanau 130-21 articulators in reproducing jaw motion.
    • To analyze specific parameters of jaw movement, including the Gothic arch angle and functional stroke length.

    Main Methods:

    • Five subjects were tested using both the Denar D5A and Hanau 130-21 articulators.
    • Graphic data from jaw movements were statistically analyzed.

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  • Measurements included the horizontal Gothic arch angle (beta) and functional stroke dimensions in incisor and molar regions.

    • Main Results:

    • No statistically significant differences were found between the Denar D5A and Hanau 130-21 articulators.
    • The average horizontal Gothic arch angle (beta) at incision was 135 degrees.
    • Functional stroke lengths averaged approximately 5 mm in the incisor region and 2.5–3 mm in the molar regions.

    Conclusions:

    • Both the Denar D5A and Hanau 130-21 articulators demonstrated adequate and comparable accuracy in reproducing the tested subjects' jaw motion.
    • The findings suggest that either articulator can be reliably used for simulating these specific aspects of jaw biomechanics.