Body Position Effects on Sternocleidomastoid and Masseter EMG Pattern Activity in Patients Undergoing Occlusal Splint Therapy

Ormeño, Guillermo; Miralles, Rodolfo; Santander, Hugo; Casassus, Rodrigo; Ferrer‐Gallego, P. Pablo; Palazzi, Carmen; Moya, Hugo

doi:10.1080/08869634.1997.11746024

Cited by 26 publications

(27 citation statements)

References 21 publications

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“…The problem is that a very weak EMG recording is difficult to interpret, because of the numerous sources of bias in the method. Most recent studies, however, favor the presence of elevator muscle electrical activity in the habitual mandibular position (Ormeno et al, 1997;Rilo et al, 1997). The fact that under general anesthesia and under the influence of curare, which completely abolishes muscle tone, the mandible can be manipulated freely without resistance also suggests the presence of muscle activity at rest.…”

Section: Regulations and Changes In The Habitual Mandibular Positionmentioning

confidence: 99%

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Woda¹,

Pionchon²,

Palla

2001

Critical Reviews in Oral Biology & Medicine

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This review argues that (1) the habitual mandibular position is constantly variable and so cannot be considered as a craniomandibular reference point, (2) there is no unique centric relation, (3) mandibular posture greatly depends on head posture, (4) clinical evaluation of the occlusal vertical dimension is mostly empirical, and (5) neither the vertical dimension at rest nor the centric relation can be determined by means of existing instrument-based clinical methods. However, some physiological conditions exist that facilitate the recording of craniomandibular position.

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Section: Regulations and Changes In The Habitual Mandibular Positionmentioning

confidence: 99%

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Woda¹,

Pionchon²,

Palla

2001

Critical Reviews in Oral Biology & Medicine

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“…This means that they considered all EMG‐signals exceeding this limit as a parafunction event. The computer analysis used in our studies does not take into account the maximum voluntary contractions, because these can differ depending on the position of the body (Ormeno et al ., 1997), which changes constantly during sleep. The chewing force also strongly depends on the particular antagonistic jaw position when biting: when pressure is exerted in a lateral position, the strength development of the left and right m. Masseter and m. Temporalis Anterior becomes very different.…”

Section: Discussionmentioning

confidence: 99%

Influence of a bite‐plane according to Jeanmonod, on bruxism activity during sleep

Okkerse

Brebels²,

Deyn

et al. 2002

J of Oral Rehabilitation

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One way to look at nocturnal oral parafunction such as bruxism, is using polysomnography. Although in recent years several studies have been carried out, it is almost impossible to compare the respective results because of the lack of standardization in the methodology used. The nocturnal muscular activity of m. Masseter and m. Temporalis Anterior has been registered in 21 patients suffering from bruxism, prior and after treatment with a bite-plane made according to Jeanmonod. A group of five persons without any dental or muscular parafunction has been included as a control. A computer program based on the biomechanical principles of muscle contraction has been developed and was used to analyse the raw electromyography (EMG) signal. The data shows a significant decrease (P = 0.008) in nocturnal parafunctional muscle activity with the bite-plane in situ. The present study shows that by analysing the raw signal obtained via EMG using a specially designed computer program, it becomes possible to isolate the occurrence of parafunctional events in the EMG signal and to study the influence of a given therapy on this EMG signal.

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“…(19) en 1994, en el músculo esternocleidomastoideo debido a que todos los sujetos presentaron una disminución significativa de la actividad tónica con la férula de estabilización, incluso Ormeño y cols. (20) encontraron que disminuye la actividad EMG con la férula al variar la posición corporal.…”

Section: Férulas Oclusales Y Actividad Electromiográfica Tónicaunclassified

“…Además, se ha observado que una férula de estabilización disminuye la actividad EMG del músculo esternocleidomastoideo durante la deglución de saliva (11,19) . Al variar la posición corporal con la férula de estabilización, la actividad EMG del músculo esternocleidomastoideo también disminuyó significativamente durante la deglución de saliva, respecto a lo observado en pacientes no sometidos a terapia con férulas (20) . La férula estimula la secreción salival y esto aumenta la frecuencia deglutoria hasta que el sistema se adapta.…”

Section: Férulas Oclusales Y Actividad Electromiográfica Durante La Dunclassified

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Después de cien años de uso: ¿las férulas oclusales tienen algún efecto terapéutico?

Santander

Valenzuela

et al. 2011

Rev. Clin. Periodoncia Implantol. Rehabil. Oral

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RESUMENLas férulas o planos oclusales han sido utilizadas desde hace más de un siglo, generando controversia acerca de su verdadero valor terapéutico. Esto motivó una revisión histórica y actualizada que permitiera evaluar sus efectos de acuerdo a la evidencia científica. Se discuten múltiples aspectos como el concepto de relación céntrica y su determinación como punto de inicio de tratamiento en la rehabilitación oral; el uso de las férulas para deprogramar; su efecto sobre la conducta motora oral que conocemos como bruxismo; su efecto en la actividad electromiográfica tónica, durante la deglución y el máximo apriete en los músculos masticatorios y cervicales; su influencia en la eficiencia muscular; su efecto en la carga articular y las evidencias experimentales del uso de distintas férulas sobre signos y síntomas específicos como dolor y ruido articular. Se plantean desafíos para la investigación sobre cambios degenerativos en las articulaciones, en la relación craneovertebral y en la curvatura e inclinación de la columna cervical. Se concluye que es necesario utilizar una férula diseñada para el trastorno específico del paciente y que su verdadero valor terapéutico queda demostrado al mejorar algunos signos y síntomas, en músculos masticatorios y cervicales. El conocimiento parcial del mecanismo de acción de las férulas contribuye a que persista la controversia de su utilización en el tratamiento de ruidos articulares y para revertir cambios degenerativos en las articulaciones. Persiste el desafío de nuevas investigaciones, que sustenten el uso de estos dispositivos como un método eficaz para tratar a nuestros pacientes, utilizando protocolos de manejo y controles periódicos. ABSTRACTOcclusal appliances or splints have been used for over a century, generating controversy about their real therapeutic value. This led to an updated review to assess their effects according to scientific evidence. The concept of centric relation and its determination as a starting point of treatment; the use of splints to deprogram; their effect on the oral motor behaviour known as bruxism are discussed. Their effect on EMG activity during resting, swallowing and maximal clenching in the masticatory and neck muscles; their effect on muscular efficiency; their effect decreasing the joint overload; and experimental evidence of the use of several appliances on specific symptoms such as pain and joint noise, are also treated. The true challenge is to generate new knowledge about joint degenerative changes, the craniocervical relationships, tilt and curvature of the cervical spine.In conclusion, it`s necessary to use an occlusal appliance designed for the specific condition of the patient, and its real therapeutic value is demonstrated by the improvement of some signs and symptoms in masticatory and cervical muscles. However, the action mechanisms of occlusal appliances are not fully understood. The lack of scientific support contributes to the persistent controversy of the use of these appliances in the treatment of temporomandibula...

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Body Position Effects on Sternocleidomastoid and Masseter EMG Pattern Activity in Patients Undergoing Occlusal Splint Therapy

Cited by 26 publications

References 21 publications

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Influence of a bite‐plane according to Jeanmonod, on bruxism activity during sleep

Después de cien años de uso: ¿las férulas oclusales tienen algún efecto terapéutico?

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