The Effect of Head Posture on Muscle Contact Position Using the T-Scan System of Occlusal Analysis

Makofsky, Howard W.; Sexton, Thomas R.; Diamond, David Z.; Sexton, Margherita T.

doi:10.1080/08869634.1991.11678378

Cited by 42 publications

(35 citation statements)

References 11 publications

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“…The clenched jaw position, exerting a similar action, may also decrease the COG velocity and improve the balance of the individual through facilitation and attenuation of reciprocal Ia inhibition in ankle extensor and flexor muscles, stabilizing the body. Studies have shown that jaw opening is associated with head extension and head position affects the sway of the COG (Makofsky et al, 1991). It is also known that a good balance of both masticatory and head and neck muscles is important for postural stability (Bracco et al, 2004).…”

Section: Clenched Jaw Eyes Openmentioning

confidence: 99%

Effect of three different jaw positions on postural stability during standing

H.¹

2015

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SummaryStudies in the literature show that jaw and neck regions are linked anatomically, biomechanically and neurologically. Voluntary clenching has been shown to improve muscle strength and performance of various motor tasks. Information from the neck sensory-motor system is reported to be important for posture. Hence it is reasonable to believe that activation of the jaw sensorymotor system has the potential to modulate posture. In a sample of 116 healthy subjects, we compared center of gravity (COG) velocity during quiet standing on a foam surface during three test positions: i) resting jaw, ii) open jaw, and iii) clenching; these were tested in two conditions: with eyes open and with eyes closed. The COG velocity decreased significantly during clenching in comparison to both open and resting jaw positions (p<0.0001). This suggests that the jaw sensory-motor system can modulate postural mechanisms. We conclude that jaw clenching can enhance postural stability during standing on an unstable surface in both the presence and absence of visual input in healthy adults and suggest that this should be taken into consideration in treatment and rehabilitation planning for patients with postural instability.

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Section: Clenched Jaw Eyes Openmentioning

confidence: 99%

Effect of three different jaw positions on postural stability during standing

H.¹

2015

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“…It does influence the trajectory of closing, and the position of the initial occlusal contacts 19,24,58,61,90 On the other hand, a forward inclined head posture does not appear to have any effect on initial occlusal contacts 59 ;…”

Section: ---A Few Commentsmentioning

confidence: 99%

Occlusion and posture: facts and beliefs

Amat¹

2008

J Dentofacial Anom Orthod

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“…If the head is positioned in a lateroflection, flection or extension, the mandible will hang at an angle to the skull [5]. This concerns the relation of the lower to the upper teeth as well.…”

Section: Ad 2: the Mandible Follows The Gravitational Vectormentioning

confidence: 99%

“…The mandible is related to gravitation: It hangs, as far as possible, according to the gravitational direction [5]. A further aspect is to mention concerning the import of mistakes from a current in the following prosthesis:…”

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confidence: 99%

A critical view on occlusion and registration

Nebel¹

2017

Dent Oral Craniofac Res

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Abstract"Occlusion" does not seem to be a sufficient parameter for diagnostics. In a similar way, "jaw relation" or "centric relation" do not seem to hit the point of the matter. In fact, they seem to be composed not of one, but of various parameters. Dental registration does not consider the parameters gravitation and spatial orientation, which contribute to the position of the jaws in the upright position. These parameters, however, are being processed in mandible and maxilla during motion in the environment. Discrepancies in the correct fit of prostheses are likely to arise from these unconsidered parameters in the upright posture of daily living. Hypothetically, discrepancies do not originate from the masticatory system, but from the postural system. Temporomandibular dysfunction hypothetically seems to develop from this very problem. Considering all of the acting parameters should improve diagnostics and treatment immensely.

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The Effect of Head Posture on Muscle Contact Position Using the T-Scan System of Occlusal Analysis

Cited by 42 publications

References 11 publications

Effect of three different jaw positions on postural stability during standing

Effect of three different jaw positions on postural stability during standing

Occlusion and posture: facts and beliefs

A critical view on occlusion and registration

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