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03-01-2024 | Bruxism | Sleep Breathing Physiology and Disorders • Original Article

Prevalence and predictors of sleep bruxism in patients with obstructive sleep apnea and the effect of positive airway pressure treatment

Authors: Nattapot Dadphan, Premthip Chalidapongse, Dittapol Muntham, Naricha Chirakalwasan

Published in: Sleep and Breathing | Issue 3/2024

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Abstract

Background

Sleep bruxism (SB) is often found to co-exist with obstructive sleep apnea (OSA). However, there are no data on prevalence and risk factors of SB in patients with OSA patients regarding the effect of optimal positive airway pressure (PAP).

Objective

This study aimed to study prevalence and risk factors of SB in OSA and to compare SB episodes during pre-treatment versus during optimal PAP therapy.

Methods

This investigation was a retrospective study including randomly selected patients with OSA who underwent split-night polysomnography. Data were collected from August 2021 to October 2022. Clinical demographic data and SB data were analyzed. The association between SB episodes and obstructive respiratory events were manually reviewed. If most of the SB episodes were observed within 5 s following obstructive respiratory events, SB was defined as SB associated with OSA. Comparison of SB index (SBI) was made between baseline portion of the study versus during optimal PAP.

Results

Among 100 patients enrolled, mean age was 50.8 ± 16.7 years and 73 subject (73%) were male. Mean respiratory disturbance index (RDI) and mean nadir oxygen saturation were 52.4 ± 33.4 and 79.3 ± 11.2% respectively. During the baseline portion of the study, 49 patients (49%) had SB and 31 patients (31%) had severe SB (SBI ≥ 4). Sleep bruxism associated with OSA was observed in 73.5% of all SB. The risk factor for SB was endorsement of nocturnal tooth grinding (odds ratio (OR) 5.69, 95%CI 1.74–18.58). Risk factors for severe bruxism were male sex (OR 4.01, 95%CI 1.02–15.88) and endorsement of nocturnal tooth grinding (OR 9.63, 95%CI 2.54–36.42). Risk factors for SB associated with OSA were non-supine RDI (OR 1.02, 95%CI 1.001–1.034) and endorsement of nocturnal tooth grinding (OR 5.4, 95%CI 1.22–23.93). In SB group, when comparison was made between baseline portion and during optimal PAP, significant reduction of SBI was observed (5.5 (3.2, 9.3) vs. 0 (0, 2.1), p < 0.001). Median difference of SBI between baseline portion and during optimal PAP was 4.4 (2.0, 8.3) (p < 0.001).

Conclusions

In this group of patients with OSA, almost half was observed to have SB in which the majority were associated with OSA. Optimal PAP resulted in a significant reduction in SB episodes. In addition to endorsement of nocturnal tooth grinding, non-supine RDI was observed to be a potential risk factor for SB associated with OSA.
Literature
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Metadata
Title
Prevalence and predictors of sleep bruxism in patients with obstructive sleep apnea and the effect of positive airway pressure treatment
Authors
Nattapot Dadphan
Premthip Chalidapongse
Dittapol Muntham
Naricha Chirakalwasan
Publication date
03-01-2024
Publisher
Springer International Publishing
Published in
Sleep and Breathing / Issue 3/2024
Print ISSN: 1520-9512
Electronic ISSN: 1522-1709
DOI
https://doi.org/10.1007/s11325-023-02985-z

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