Evaluation of pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder according to the Research Diagnostic Criteria of Temporomandibular Disorders

Herpich, Carolina Marciela; Politti, Fabiano; Gomes, Cid Andre Fidelis de Paula; Gloria, Igor Phillip dos Santos; Amaral, Ana Paula; Amaral, Maitê de Freitas Rocha de Souza; Herpich, Graciela; Kalil, Sandra Bussadori; Gonzalez, Tabajara de Oliveira; Biasotto-Gonzalez, Daniela Aparecida

doi:10.1590/1982-021620182028616

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ORIGINAL ARTICLES • Rev. CEFAC 20 (2) • Mar-Apr 2018 • https://doi.org/10.1590/1982-021620182028616 copy

Evaluation of pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder according to the Research Diagnostic Criteria of Temporomandibular Disorders

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purpose:

to evaluate the pain threshold upon palpation of the masticatory muscles in women with temporomandibular disorder (TMD) according to the Research Diagnostic Criteria of Temporomandibular Disorders (RDC/TMD).

Methods:

a cross-sectional study was conducted involving the evaluation of pain threshold upon palpation of the extraoral muscles (temporal, masseter, posterior mandibular region, submandibular region) and intraoral muscles (lateral pterygoid area and temporal tendon) in women using the RDC/TMD clinical examination.

Results:

60 women were evaluated. Statistically significant differences were found among the muscles evaluated regarding the pain threshold. The lateral pterygoid area, bilaterally, had the lowest pain threshold, followed by the masseter and temporal muscles.

Conclusion:

this study suggests that the lateral pterygoid muscle, bilaterally, has the lowest pain threshold upon palpation among the masticatory muscles, followed by masseter and temporal muscles, in women with TMD, according to the RDC/TMD evaluation.

Keywords:
Temporomandibular Joint Disorders; Physical Therapy Modalities; Myofascial Pain Syndromes

Diagnosis	n	%
Only group I (muscle)	24	40
Only group II (disc displacement)	4	6.6
Only group III (arthralgia)	2	3.3
Groups I and II	16	26.6
Groups I and III	5	8.3
Groups II and III	2	3.3
Groups I. II and III	7	11.6
Total	60	100

	Right side	Left side
	Median (25-75%)	Median (25-75%)
Lateral pterygoid muscle	1.59 (1.27-1.90)	1.67 (1.40-1.93)
Temporal muscle	0.65 (0.48-0.81)	0.60 (0.44-0.76)
Masseter muscle	1.03 (0.83-1.23)	1.07 (0.86-1.29)
Posterior mandibular region	0.45 (0.23-0.68)	0.51(0.29-0.73)
Submandibular region	0.13 (0.02-0.24)	0.18 (0.06-0.29)
Lateral pole	0.88 (0.61-1.15)	0.81(0.57-1.06)
Posterior ligament	0.37 (0.16-0.58)	0.40 (0.21-0.60)
Temporal tendon	0.65 (0.38-0.92)	0.68 (0.40-0.97)
Comparisons among variables	p<0.005*	p<0.005*

	MT		MM		PMR		SR		LP		PL		TT
	R	L	R	L	R	L	R	L	R	L	R	L	R	L
LPA	<0.05	<0.001	ns	ns	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
MT			ns	ns	ns	ns	<0.001	<0.001	ns	ns	<0.05	ns	ns	ns
MM					<0.001	<0.001	<0.001	<0.001	ns	ns	<0.001	ns	<0.01	<0.01
PMR							ns	ns	ns	ns	ns	ns	ns	ns
SR									<0.001	<0.001	<0.001	ns	<0.001	ns
LP											<0.001	ns	<0.001	<0.001
PL													ns	ns

ABRAMO Associação Brasileira de Motricidade Orofacial Rua Uruguaiana, 516, Cep 13026-001 Campinas SP Brasil, Tel.: +55 19 3254-0342 - São Paulo - SP - Brazil
E-mail: revistacefac@cefac.br

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[1] Mailing address: Carolina Marciela Herpich, Rua Prof. José Maria Barone Fernandes, 300, Vila Maria, CEP: 02117-020 - São Paulo, São Paulo, Brasil, E-mail: carolinaherpich12@hotmail.com