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Bruxism Induced by Obstructive Sleep Apnoea.

Key facts

Who runs it
Wroclaw Medical University
Where
Wroclaw, PolandSee the site
Trial code
Status
Not yet recruiting
People taking part
80 people, planned
Started
Sept 2026
Expected to end
Nov 2026
Type of study
Observational, 2 groups
Treatments tested
  • Upper airway volume assessment using Cone-Beam Computed Tomography (CBCT) and Polysomnography
  • Upper airway volume assessment using Cone-Beam Computed Tomography (CBCT)
Record updated
22 July 2026

Who can take part

Age
18 years and older
Sex
Women and men
Healthy volunteers
Can take part

The registry criteria, word for word

Show all 14 criteriaShow less

Who can take part

  • age equal to/greater than 18 years
  • moderate or high risk of sleep apnea according to the STOP-Bang questionnaire
  • presence of bruxism symptoms in the oral cavity according to the current international consensus on bruxism
  • positive history of bruxism during sleep

Who cannot take part

  • alcohol and/or drug addiction
  • taking medications that affect the neuromuscular and/or respiratory systems
  • presence of severe mental illness
  • severe systemic diseases such as cancer
  • severe neurological and autoimmune diseases
  • refusal to participate in the study
  • pregnancy
  • breastfeeding
  • multiple missing teeth
  • edentulism in the upper and/or lower jaw

Where in Poland

  • Uniwersyteckie Centrum StomatologiczneWroclaw, PolandContact: Andrzej Małysa, PhDNo longer taking part

About the trial

What the trial wants to find out

The relationship between obstructive sleep apnea (OSA), sleep bruxism, and temporomandibular disorders is becoming clearer, but data on how upper airway volume affects bruxism due to OSA is limited. Recent studies have shown that Cone-Beam Computed Tomography (CBCT) accurately images the upper airway, enabling analysis of its volume and its potential impact on bruxism. CBCT uses low radiation doses, significantly lower than harmful levels, making it a safe method for such assessments. Understanding these relationships can inform clinical practices for managing sleep bruxism, which affects 21% of the global population. The study aims to explore how upper airway volume influences the intensity of sleep bruxism related to OSA.

The 2 groups in the trial

  • Study Group

    The study group will consist of patients with sleep bruxism and obstructive sleep apnoea. Participants will be examined based on the standardised international protocol Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). Study participants will complete the following validated questionnaires assessing their psycho-emotional state and selected aspects related to the function of the stomatognathic system, including PHQ-9, PSS-10, GAD-7, SWLS, SSS-8, MIDAS, JFLS-8, TMD Pain Screener and DC/TMD Symptom Questionnaire (Diagnostic Criteria for Temporomandibular Disorders Symptom Questionnaire). In addition, the following validated sleep questionnaires will be used: EPWORTH ,PSQI and STOP-Bang Questionnaire. Subsequently, CBCT computed tomography will be performed along with polysomnography to determine the parameters of upper airway volume and sleep apnea.

    Treatment: Upper airway volume assessment using Cone-Beam Computed Tomography (CBCT) and Polysomnography

  • Control Group

    The control group will consist of patients with sleep bruxism. Participants will be examined based on the standardised international protocol Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). Study participants will complete the following validated questionnaires assessing their psycho-emotional state and selected aspects related to the function of the stomatognathic system, including PHQ-9, PSS-10, GAD-7, SWLS, SSS-8, MIDAS, JFLS-8, TMD Pain Screener and DC/TMD Symptom Questionnaire (Diagnostic Criteria for Temporomandibular Disorders Symptom Questionnaire). In addition, the following validated sleep questionnaires will be used: EPWORTH ,PSQI and STOP-Bang Questionnaire. Subsequently, CBCT computed tomography will be performed to determine the parameters of upper airway volume.

    Treatment: Upper airway volume assessment using Cone-Beam Computed Tomography (CBCT)

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
Evaluation of the Relationship Between Upper Airway Volume and the Risk of Bruxism Induced by Obstructive Sleep Apnoea.
Record updated
22 July 2026