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Management of chronic closed lock.

Emma Charters1, Krishnan Parthasarathi1, Benjamin Gupta2

  • 1Department of Head and Neck Surgery, Chris O'Brien Lifehouse, Sydney, Australia; School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.

The British Journal of Oral & Maxillofacial Surgery
|September 25, 2025
PubMed
Summary
This summary is machine-generated.

Restorabite™ effectively treats temporomandibular joint dysfunction (TMD) related trismus, improving jaw mobility and quality of life. This safe, conservative jaw-stretching device showed significant long-term benefits for patients with chronic TMJ closed lock.

Keywords:
Quality of lifeRehabilitationTemporomandibular jointTrismus

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Rehabilitative Medicine
  • Biomedical Engineering

Background:

  • Temporomandibular joint dysfunction (TMD) can cause jaw hypomobility and trismus, impacting function.
  • Conservative treatments are preferred for TMD over surgical interventions when feasible.
  • Chronic closed lock of the temporomandibular joint (TMJ) presents a significant clinical challenge.

Purpose of the Study:

  • To evaluate the safety and efficacy of Restorabite™, a novel jaw-stretching device.
  • To assess Restorabite™'s impact on trismus in patients with chronic TMJ closed lock.
  • To measure improvements in maximum incisal opening and quality of life outcomes.

Main Methods:

  • A prospective study involving 15 participants with TMD-related trismus.
  • Participants used Restorabite™ as their primary conservative treatment modality.
  • Outcome measures included maximum incisal opening and quality of life assessments at baseline, 10 weeks, and 6/12-month follow-ups.

Main Results:

  • Significant improvement in maximum incisal opening by an average of 15.1 mm post-intervention (p < 0.001).
  • Sustained gains in mouth opening observed at 6 and 12 months (16.7 mm and 15.5 mm, respectively).
  • Marked improvement in trismus-related quality of life scores (23.6, p = 0.01) with no adverse events.

Conclusions:

  • Restorabite™ is a safe and effective conservative treatment for TMD-related trismus.
  • The device demonstrates significant efficacy in improving jaw mobility and patient-reported outcomes.
  • Restorabite™ offers a viable therapeutic option for chronic TMJ closed lock management.