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Related Experiment Videos

[Method and optical device for exactly hinge axis localization tested on original phantom].

C P P Neumann1, D Gogălniceanu, Monica Silvia Tatarciuc

  • 1Departamentul de Reabilitare Orală Complexă, Facultatea de Medicină Stomatologică, Universitatea de Medicină şi Farmacie Gr.T. Popa Iaşi.

Revista Medico-Chirurgicala a Societatii De Medici Si Naturalisti Din Iasi
|March 15, 2003
PubMed
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This study introduces a fast and precise method for locating the temporomandibular joint (TMJ) hinge axis using the moiré effect. This technique accurately registers the rotation axis during mandibular movements for clinical application.

Area of Science:

  • Dentistry
  • Biomechanics
  • Optical Physics

Context:

  • Accurate determination of the temporomandibular joint (TMJ) hinge axis is crucial for prosthodontic and orthodontic treatments.
  • Existing methods for hinge axis location can be time-consuming and lack precision.

Purpose:

  • To present a novel, rapid, and exact method for locating the kinematic hinge axis of the temporomandibular joint (TMJ).
  • To utilize the moiré effect generated by optical nets for precise registration of the mandibular rotation axis.

Summary:

  • A face bow with attached optical devices is fixed to the mandible.
  • Two optical nets are applied to the skin over the TMJ.
  • During mandibular opening, the moiré effect between displaced optical nets precisely registers the rotation axis, allowing for accurate hinge axis notation on the skin.

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  • Validation was performed using a custom-made phantom skull.

    • Impact:

    • This method offers a potentially more efficient and accurate approach to hinge axis determination in clinical practice.
    • Improved accuracy in hinge axis location can lead to better-fitting dental prosthetics and more effective orthodontic outcomes.
    • The use of optical nets and moiré effect provides a non-invasive and objective measurement technique.