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Related Experiment Videos

Simple hinge and semiadjustable articulators in orthognathic surgery.

J V Marko

    American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
    |July 1, 1986
    PubMed
    Summary

    Model surgery planning for orthognathic cases requires careful articulator selection. While simple hinge articulators suffice for some procedures, semiadjustable articulators offer greater accuracy, especially in complex two-jaw surgeries.

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    Area of Science:

    • Dentistry
    • Oral and Maxillofacial Surgery
    • Biomechanical Engineering

    Background:

    • Model surgery is crucial for planning orthognathic surgical cases.
    • Articulator selection (simple hinge vs. semiadjustable) impacts surgical planning accuracy.
    • Geometric and mathematical analyses are needed to define articulator indications.

    Purpose of the Study:

    • To discuss theoretical errors associated with face-bow records.
    • To derive error formulas for all types of articulators.
    • To determine indications for simple versus adjustable articulators.
    • To describe semiadjustable articulator use in two-jaw surgery.

    Main Methods:

    • Geometric and mathematical analysis of simple hinge and semiadjustable articulators.

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  • Derivation of error formulas for articulator use.
  • Case descriptions of two-jaw surgery utilizing semiadjustable articulators and intermediate splints.

    • Main Results:

    • Simple hinge articulators are suitable for specific procedures: mandibular surgery, anterior subapical surgery, and transverse maxillary surgery.
    • Error formulas quantify inaccuracies inherent in different articulator types.
    • Overuse of semiadjustable articulators does not introduce complications in orthognathic surgery.

    Conclusions:

    • Articulator selection should be based on specific geometric and mathematical criteria for optimal orthognathic surgical planning.
    • Semiadjustable articulators provide a safer margin of error and are recommended for complex cases.
    • Understanding articulator limitations is key to successful surgical outcomes.