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Variability of passively recorded centric relation.

R L Simon, J I Nicholls

    The Journal of Prosthetic Dentistry
    |January 1, 1980
    PubMed
    Summary
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    Centric relation in asymptomatic patients represents a narrow range of mandibular positions. Different recording techniques showed no significant variation, indicating the method

    Area of Science:

    • Dental occlusion and biomechanics.
    • Temporomandibular joint (TMJ) function.

    Background:

    • Understanding centric relation is crucial for prosthodontic and orthodontic treatments.
    • Accurate determination of centric relation minimizes occlusal discrepancies and TMJ issues.

    Purpose of the Study:

    • To quantify the range of mandibular positions defining centric relation in individuals without signs of mandibular dysfunction.
    • To compare the reliability of different methods for recording centric relation.

    Main Methods:

    • Five subjects without clinical signs of mandibular dysfunction were included.
    • Mandibular positions were recorded using three techniques: chin-point guidance, chin-point guidance with ramus support, and bimanual manipulation.
    • The range of mandibular shift was measured mediolaterally and anteroposteriorly.

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    Main Results:

    • Centric relation was found to be a small range of mandibular positions.
    • The average range of mandibular shift was 0.302 mm mediolaterally and 0.278 mm anteroposteriorly.
    • No significant differences were observed between the three recording techniques.

    Conclusions:

    • The determined range of centric relation is minimal in healthy individuals.
    • The tested techniques for recording centric relation exhibit comparable reliability.
    • The methodology is sensitive enough to detect minor biologic variations in mandibular positioning.