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Related Experiment Video

Updated: May 22, 2025

A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
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A completely digital workflow for an anterior repositioning device.

Nguyen Thu Tra1, Nguyen Viet Anh2, Nguyen Minh Duc3

  • 1Lecturer, Department of Prosthodontics, School of Dentistry, Hanoi Medical University, Hanoi, Vietnam; and Doctoral student, Department of Functional Anatomy and Neuroscience, Graduate School of Medicine, Nagoya University, Aichi, Japan.

The Journal of Prosthetic Dentistry
|March 13, 2025
PubMed
Summary

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This study introduces a digital scanning technique for anterior repositioning devices, improving temporomandibular joint disorder treatment. This method accurately captures jaw movement, reducing chair time for patients and dentists.

Area of Science:

  • Dentistry
  • Biomechanical Engineering
  • Medical Device Technology

Background:

  • Temporomandibular joint (TMJ) pain, often linked to internal derangement, is commonly treated with anterior repositioning devices.
  • These devices feature a ramp to guide mandibular repositioning, but traditional methods lack precision in capturing the closure path.
  • Manual adjustment of the ramp during appliance insertion leads to prolonged clinical appointments.

Purpose of the Study:

  • To present a novel digital scanning technique for fabricating anterior repositioning devices.
  • To improve the accuracy of device fitting by incorporating the mandibular closing path.
  • To reduce the clinical chair time required for appliance insertion and adjustment.

Main Methods:

  • Utilized advanced digital scanning technology to capture detailed intraoral anatomy.

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  • Specifically recorded the patient's habitual mandibular closing path during the scanning process.
  • Fabricated the anterior repositioning device based on the comprehensive digital model.

    • Main Results:

    • The digital technique accurately recorded the mandibular closing path, a crucial parameter previously difficult to capture.
    • Device insertion and fitting were significantly streamlined due to the precise digital fabrication.
    • Reduced the need for manual ramp adjustments, leading to a more efficient clinical workflow.

    Conclusions:

    • Digital scanning, including the mandibular closing path, offers a superior method for fabricating anterior repositioning devices.
    • This technique enhances treatment efficiency and patient comfort for temporomandibular joint disorders.
    • Minimizing chair time through digital workflows represents a significant advancement in occlusal device treatment.