HIGHClinicalTier 1

The enigma of limited mouth opening: Implications for the clinician and practice

SourceJournal of the American Dental Association (JADA)Tier 1Peer-Reviewed Research

Originally at sciencedirect.com

Summary & scoring by The Bell Brief (Dr. Jennifer Bell) using the Drill-Down Protocol (Drill-Down Score) — not the original publisher.

Why it matters for dental

JADA review highlights that unexplained trismus can delay or derail routine dental procedures; practice owners and restorative clinicians need protocols to identify red-flag etiologies early, avoid treatment delays, and reduce liability exposure.

Key points

  • Pre-treatment limited opening (<35 mm) is linked to higher rates of incomplete restorations, failed crown seating, and patient dissatisfaction.
  • Article flags six occult causes (myofascial pain, occult infection, neoplasia, medication-induced fibrosis, systemic sclerosis, TMJ ankylosis) that require immediate referral rather than in-office stretching.
  • Authors recommend adding a single inter-incisal measurement and brief questionnaire to every new-patient exam to capture changes before procedures begin.
  • Failure to document baseline opening increases malpractice risk if post-op trismus occurs after long or difficult appointments.

Who should care

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Read the original on Journal of the American Dental Association (JADA)

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