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BMC Oral Health
Published in: BMC Oral Health 1/2023

Open Access 01-12-2023 | Obesity | Research

Obesity and temporomandibular joint disorders: a systematic review and meta-analysis

Authors: Xia Wang, Yan Yang, Linni Lin, Qianqian Yao, Jingjing Zhang

Published in: BMC Oral Health | Issue 1/2023

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Abstract

Background

Temporomandibular joint disorders (TMD) is the most common non-dental pain complaint in the maxillofacial region, which presents a variety of symptoms and signs, including temporomandibular joints (TMJ) and masticatory muscle pain, joint noise, tinnitus, headaches, irregular or restricted mandibular function, masticatory difficulty, and restricted mouth opening. When comes to the relationship between obesity and TMD, it has remained controversial and inconsistent, therefore, we first conducted this meta-analysis to estimate the unclear relationship between obesity and TMD.

Methods

Searches were conducted in PubMed, Web of Science, Embase, and Cochrane Library. Subjects were divided into five groups according to BMI level in this study, including the normal weight group: 18.5 ≤ BMI < 25, overweight group: 25 ≤ BMI < 30, obesity group: BMI ≥ 30, control group: BMI < 25, and overweight and obesity group: BMI ≥ 25. Statistics analyses were conducted using Stata (15.0). The number of PROSPERO was CRD42022368315.

Results

Eight studies were included in this study, and six articles with a total of 74,056 participants were synthesized for meta-analysis. Compared to normal weight individuals, overweight and obesity together decreased the risk of TMD (OR = 0.66, 95% CI = 0.46–0.95), and it was significantly decreased by obesity alone (OR = 0.58). Moreover, it was lower in obesity compared with control subjects (OR = 0.83, 95% CI = 0.73–0.94). Furthermore, in overweight and obese individuals, it was much lower in obesity than in overweight (OR = 0.82, 95% CI = 0.71–0.94).

Conclusions

Obesity is not a risk factor for TMD, and maybe a protective factor for TMD, of which patients with larger BMI are less likely to suffer from TMD pain. Therefore, the value of BMI should be taken into consideration in the assessment of TMD.
Appendix
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Metadata
Title
Obesity and temporomandibular joint disorders: a systematic review and meta-analysis
Authors
Xia Wang
Yan Yang
Linni Lin
Qianqian Yao
Jingjing Zhang
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Oral Health / Issue 1/2023
Electronic ISSN: 1472-6831
DOI
https://doi.org/10.1186/s12903-023-03322-2

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