Document Detail

Effect of controlled masticatory exercise on pain and muscle performance in myofascial pain patients: A pilot study.
MedLine Citation:
PMID:  16933459     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to test the hypothesis that strengthening masticatory muscles using a controlled chewing exercise protocol improves muscle function, as evaluated quantitatively by electromyogram, and reduces pain at rest and during function. The study included 20 patients diagnosed with myofascial pain according to the Research Diagnostic Criteria for Temporomandibular Disorders with low masseter volume increase during maximal clench. The exercise group (ten patients) was subjected to a controlled gum chewing exercise protocol for eight weeks: the control group (ten patients) received only support and encouragement. Patients were examined at the beginning and at the end of the experiment which included an electromyogram (EMG) to assess muscle performance, masticatory muscle tenderness to palpation, mouth opening range, subjective anamnestic indices to evaluate pain perception and pain relief, and chewing tests. The EMG showed that the masticatory muscle exercise did produce objective physiologic results. In the exercise group, a significant increase was found in the electric muscle activity of the masseters during maximal voluntary clench (p=0.007). The exercise group showed significant reduction in pain during rest, pain during the chewing test, and a disability score. At the end of the study, a difference between the two groups was shown in the Pain Relief Scale: significantly greater pain relief was found in the exercise group as compared to the control group (p=0.019). For all other clinical parameters, there was no difference between the two groups or interaction between time and treatment. The results of this study seem to be equivocal. Additional experiments on larger population groups with extended chewing protocols are necessary before a more substantial conclusion can be reached.
Anat Gavish; Ephraim Winocur; Tamara Astandzelov-Nachmias; Esther Gazit
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Publication Detail:
Type:  Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Cranio : the journal of craniomandibular practice     Volume:  24     ISSN:  0886-9634     ISO Abbreviation:  Cranio     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-08-28     Completed Date:  2006-10-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8609491     Medline TA:  Cranio     Country:  United States    
Other Details:
Languages:  eng     Pagination:  184-90     Citation Subset:  D    
Department of Oral Rehabilitation, School of Dental Medicine, Faculty of Medicine, Tel Aviv University, Israel.
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MeSH Terms
Analysis of Variance
Chewing Gum
Exercise Therapy / methods*
Facial Pain / therapy*
Masseter Muscle / physiopathology*
Middle Aged
Myofunctional Therapy*
Pain Measurement
Pilot Projects
Prospective Studies
Temporomandibular Joint Dysfunction Syndrome / therapy*
Reg. No./Substance:
0/Chewing Gum

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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