Document Detail

Electromyography in diagnosing temporomandibular disorders.
MedLine Citation:
PMID:  22467695     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Although electromyography (EMG) has been used extensively in dentistry to assess masticatory muscle impairments in several conditions, especially temporomandibular disorders (TMDs), many investigators have questioned its psychometric properties and accuracy in diagnosing TMD.
TYPES OF STUDIES REVIEWED: The authors conducted a systematic review to analyze the literature critically and determine the accuracy of EMG in diagnosing TMDs. They conducted an electronic search of MEDLINE, Embase, all Evidence-Based Medicine Reviews, Allied and Complementary Medicine, Ovid HealthSTAR and SciVerse Scopus. The authors selected abstracts that fulfilled the inclusion criteria, retrieved the original articles, verified the inclusion criteria and hand searched the articles' references. They used a methodological tool (Quality Assessment of Diagnostic Accuracy Studies [QUADAS]) to evaluate the quality of the selected articles.
RESULTS: The electronic database search resulted in a total of 130 articles. The authors selected eight articles as potentially meeting eligibility for the review. Of these eight articles, only two fulfilled the study inclusion criteria, and the authors analyzed them. Investigators in both studies reported low sensitivity (values ranged from 0.15 to 0.40 in one study and a mean of 0.69 in the second study). In addition, investigators in the two studies reported contradictory levels of specificity (values ranged from 0.95 to 0.98 in one study, and the mean value in the second study was 0.67). The likelihood ratios and predictive values were not helpful in diagnosing TMD by means of EMG. The quality of the two studies was poor on the basis of the QUADAS checklist.
CLINICAL IMPLICATIONS: The authors of this systematic review found no evidence to support the use of EMG for the diagnosis of TMD.
Mohammed A Q Al-Saleh; Susan Armijo-Olivo; Carlos Flores-Mir; Norman M R Thie
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Journal of the American Dental Association (1939)     Volume:  143     ISSN:  1943-4723     ISO Abbreviation:  J Am Dent Assoc     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-04-02     Completed Date:  2012-09-27     Revised Date:  2012-11-29    
Medline Journal Info:
Nlm Unique ID:  7503060     Medline TA:  J Am Dent Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  351-62     Citation Subset:  D; IM    
TMD/Orofacial Pain Clinic, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
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MeSH Terms
Electromyography / statistics & numerical data*
Likelihood Functions
Predictive Value of Tests
Sensitivity and Specificity
Temporomandibular Joint Disorders / diagnosis*
Grant Support
//Canadian Institutes of Health Research
Comment In:
J Am Dent Assoc. 2012 Oct;143(10):1072-4; author reply 1076-80   [PMID:  23024303 ]
J Am Dent Assoc. 2012 Oct;143(10):1074-6; author reply 1076-80   [PMID:  23024304 ]

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