EC Dental Science

Research Article Volume 22 Issue 7 - 2023

A Preliminary Study of Sleep Bruxism Associated with Obstructive Sleep Apnoea Syndrome in Hong Kong

Sukhdeep Murbay1* and Yun-Kwok Wing2

1Operative Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
2Li Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Shatin Hospital, The Chinese University of Hong Kong, Hong Kong

*Corresponding Author: Sukhdeep Murbay, Operative Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
Received: May 11, 2023; Published: June 09, 2023

Introduction and Purpose: Obstructive sleep apnoea (OSA) is a common sleep disorder characterised by repeated episodes of shallow (hypopnoeic) or absent (apnoeic) breathing during sleep. Bruxism is another condition commonly observed in patients with OSA, however, the evidence of its association to OSA is still inconclusive. The objective of this study was to determine if there is an association between OSA and bruxism.

Methods: Participants were recruited from 1st December 2017 to 30th November 2018. Eligible participants were assessed for bruxism. All participants underwent a structured questionnaire and oral examination by an experienced dentist (SM). Tooth wear was assessed by using the Basic Erosive Wear Examination (BEWE). Collected data was analysed using SPSS version 26 and Statistical significance was set at p value < 0.05.

Results: A total of 29 participants included in the study, with a mean age of 55 ± 18 years and 72% being males. While only about 14% of participants reported having been heard grinding their teeth at night, almost all participants (96.5%) showed signs of bruxism. Majority of participants had some degree of tooth wear with a BEWE score of 2 (79.3%). The median apnoea-hypo-apnoea index (AHI) was 9.9 (IQR: 6 - 22). Twenty-four percent (24%) of participants had no OSA, 38% had mild OSA, 24% had moderate OSA and 14% had severe OSA. There was no statistically significant association between the presence of and the severity of OSA and the sex, age, marital status, and occlusion/malocclusion, tooth wear-BEWE scores of the participants. Likewise, there was no correlation between age, the BEWE score and the AHI index.

Conclusion: While only about 14% of participants reported symptoms of teeth grinding at night, all twenty-nine except one participant were found to have objective sign of bruxism. However, no significant association was found between bruxism and the presence or severity of OSA. More studies with larger sample sizes are required to further consolidate this observation.

Keywords: Bruxism; Obstructive Sleep Apnoea; Association; Tooth-Wear

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Sukhdeep Murbay and Yun-Kwok Wing. "A Preliminary Study of Sleep Bruxism Associated with Obstructive Sleep Apnoea Syndrome in Hong Kong". EC Dental Science 22.7 (2023): 78-91.