Relationship between self‐reported sleep bruxism and pain in patients with temporomandibular disorders

The aim of the present systematic review was to answer the overall research question: “To what extent is bruxism associated with musculoskeletal signs and symptoms?”. The review was performed in accordance with the PRISMA guidelines. A PubMed search of articles published until 23 November 2017 was conducted. The search string included both MeSH terms and text words. Results were presented in categories according to study design, study population (eg, adults, children), bruxism sub‐type (awake, sleep), assessment methods for bruxism and musculoskeletal symptoms (self‐report, validated test) and type of outcome (pain, non‐painful musculoskeletal symptoms). It could be concluded that bruxism is to some extent associated with musculoskeletal symptoms, even though the evidence is conflicting and seems to be dependent on many factors, such as age, whether the bruxism occurs during sleep or wakefulness, and also the quality of the diagnostic methodology regarding bruxism and musculoskeletal signs and symptoms. The literature does not support a direct linear causal relationship between bruxism and such symptoms, but points more in the direction of a multifaceted relationship dependent on the presence of other risk factors. Pain is by far the most commonly assessed symptom, whereas non‐painful musculoskeletal symptoms have generally not been systematically evaluated. In the light of recent findings indicating that non‐painful symptoms may precede TMD pain, it is suggested to increase the scientific focus on non‐painful musculoskeletal symptoms in future studies. Also, future studies should use validated methods for case definition and outcome assessments.

Section: Resultsmentioning

confidence: 90%

“…TMJ symptoms: RDC/TMD diagnosed arthropathy with or without discopathy were assessed by Blanco Aguilera et al, and no association was found with self‐reported sleep bruxism.…”

Section: Resultsmentioning

confidence: 99%

To what extent is bruxism associated with musculoskeletal signs and symptoms? A systematic review

Baad‐Hansen

Thymi

Lobbezoo

et al. 2019

“…Parafunctional habits such as bruxism, nail and lip biting were shown as significant risk factors for TMD pain . Studies show that bruxism is more common among TMD patients than in healthy subjects .…”

Section: Discussionmentioning

confidence: 99%

Clinical and intra‐operative factors affecting the outcome of arthrocentesis in disc displacement without reduction: A retrospective study

Baş

Yuceer

Kazan

et al. 2019

Background Temporomandibular disorder (TMD) is a group of disease which affects the temporomandibular joint (TMJ) and supporting tissues of the musculoskeletal structures. Arthrocentesis is an effective treatment modality for TMD, especially in patients who suffer from pain and limited mouth opening. Objective The aim of this study was to investigate the effects of pre‐operative and intra‐operative variables on the clinical outcome of arthrocentesis therapy. Methods The records of 83 patients diagnosed as disc displacement (DD) without reduction according to DC/TMD, and treated with arthrocentesis were selected. Sex, age, bruxism history, pain intensity and maximum mouth opening (MMO) were recorded as pre‐operative variables. Extravasation and the amount of irrigation were recorded as intra‐operative variables. The success of the arthrocentesis procedure was determined as MMO <35 mm and pain intensity lower than 3, at third‐month follow‐up. Results At 3‐month follow‐up, clinical evaluation showed a significant reduction in TMJ pain and an increase in MMO (P < 0.05). It was found that patients with an unsuccessful outcome are those who had a more restricted MMO and severe pain before the procedure. Extravasation was found to be a significant factor that affects the success of the procedure. Conclusion The success of arthrocentesis in TMJ DD without reduction is adversely affected by the severity of the pre‐operative clinical symptoms. Extravasation is also a factor that has a negative effect on the success of the procedure.

“…1-3 However, data from polysomnographic recordings of muscle behaviors in TMD and control subjects contradicts this association. 4, 5 The inconsistency amongst findings may be due to differences in, and limitations of, study design, data collection and analytical methods.…”

Section: Introductionmentioning

confidence: 99%

A pilot study of nocturnal temporalis muscle activity in TMD diagnostic groups of women

Wei

Horn

Coombs

et al. 2017

Background Temporomandibular disorder (TMD) incidences are believed to be related to parafunctional behaviors like teeth clenching. Objectives This pilot study aimed to (i) develop an automated clench-detection algorithm, and (ii) apply the algorithm to test for differences in nocturnal clenching in women with and without TMD. Methods Subjects gave informed consent to participate. Adult women were categorized using Diagnostic Criteria for TMD according to presence/absence (+/-) of both TM joint disc placement (DD) and chronic pain (P) into two groups (+DD+P, -DD-P) with 12 subjects each. Surface temporalis electromyography was recorded during oral tasks performed by subjects at two laboratory sessions. The data were used to characterize muscle activity per N of bite-force (μV/N) for each subject, develop the clench-detection algorithm and test its accuracy. Ambulatory surface temporalis electromyography was self-recorded by each subject over three nights and analyzed using the algorithm and bite-force (N) vs muscle activity μV/N calibrations. Bonferroni-adjusted homoscedastic t-tests assessed for significant between-group differences in clenching (p<0.05). Results Sensitivity, specificity, and accuracy of algorithm-detected laboratory clenches were all ≥96%. During self-recordings 95% of clenches had durations of <4 seconds and peak forces of <10 N in both groups. Mean clench durations were significantly longer (p=0.042) in +DD+P (1.9±0.8 seconds) than -DD-P subjects (1.4±0.4 seconds). Mean temporalis duty factors (%clench time/total recording time) were significantly larger (p=0.041) in +DD+P (0.47±0.34%) than -DD-P (0.26±0.22%) subjects. Conclusions Nocturnal temporalis muscle activities detected by a validated algorithm were longer per clench and recording time in +DD+P compared to -DD-P women.