Relations Between Occlusal Interference and Jaw Muscle Activities in Response to Changes in Head Position

Funakoshi, Mitsuaki; N, Fujita; Takehana, S

doi:10.1177/00220345760550042401

Cited by 92 publications

(46 citation statements)

References 6 publications

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“…Some authors believe that head 6 or body posture 8 plays a role in TMD onset and development. The reasoning would be that a chronically altered craniocervical posture could lead to mandibular postural changes through biomechanical 4 and neuromuscular mechanisms 3 . Some authors have reported postural pattern alterations in TMD subjects in comparison with healthy subjects 6,7,10 , while others 1 have not found any differences between TMD and healthy subjects.…”

Section: Introductionmentioning

confidence: 99%

Radiographic evaluation of cervical spine of subjects with temporomandibular joint internal disorder

Munhoz

Marques²,

Siqueira

2004

Braz. oral res.

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Although the etiopathophysiology of internal temporomandibular joint internal disorders (TMJ ID) is still unknown, it has been suggested that head and body posture could be related to its initial onset, development and perpetuation. The purpose of the present study was to observe the relationship between cervical spine X-ray abnormalities and TMJ ID. This investigation evaluated 30 subjects with internal TMJ disorder symptoms (test group) and 20 healthy subjects (control group). Subjects were submitted to clinical and radiographic evaluation. Clinical evaluation comprised anamnesis and stomatognathic system physical examination. Radiographic evaluation comprised analysis of lateral cervical spine X-rays by three physical therapists and tracing on the same images. The test group presented twice as much cervical spine hyperlordosis as the control group (20.7% versus 10.5%), but almost half of rectification prevalence (41.4 versus 79.0%, p = 0.03). After that, the test group was divided into three subgroups according to TMJ dysfunction severity, evaluated by Helkimo's index. These subgroups were not significantly different, but the subgroup with more severe TMD showed a tendency to cervical spine hyperlordosis prevalence. Results showed a tendency for subjects with more severe TMD to exhibit cervical spine hyperlordosis. Nevertheless, studies with a larger number of subjects suffering from severe TMD are encouraged in order to corroborate the present findings. DESCRIPTORS: Temporomandibular joint disorders; Spinal column; Radiography; Posture. RESUMO:Apesar de a etiofisiopatologia dos distúrbios internos (DI) da articulação temporomandibular (ATM) ser ainda desconhecida, sugere-se que as posturas de cabeça e corpo estariam associadas a seu desencadeamento, desenvolvimento e sua perpetuação. O objetivo deste estudo foi verificar a relação entre alterações radiográficas de coluna cervical e distúrbios internos da ATM. Este estudo avaliou 30 indivíduos com distúrbios da ATM (grupo teste) e 20 saudáveis (grupo controle). Os indivíduos submeteram-se à avaliação clínica e radiográfica. A avaliação clínica consistiu de anamnese e exame físico do sistema estomatognático. A avaliação radiográfica consistiu de análise de radiografias laterais de coluna cervical por fisioterapeutas e traçados. O grupo teste apresentou o dobro da prevalência de hiperlordose de coluna cervical (20,7% versus 10,5%) e quase a metade (41,4% versus 79,0%) de retificação (p = 0,03). Em um segundo momento, o grupo teste foi subdividido em três subgrupos em função da gravidade clínica da disfunção temporomandibular, avaliada pelo índice de Helkimo. Não houve diferença estatisticamente significante entre os subgrupos, mas se constatou uma tendência do subgrupo com disfunção grave a apresentar prevalência de hiperlordose cervical. Esses resultados sugerem uma tendência dos indivíduos com disfunção temporomandibular (DTM) grave a apresentarem hiperlordose. No entanto, futuros estudos devem ser feitos, analisando-se um maior número de indivíduos...

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Section: Introductionmentioning

confidence: 99%

Radiographic evaluation of cervical spine of subjects with temporomandibular joint internal disorder

Munhoz

Marques²,

Siqueira

2004

Braz. oral res.

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“…Change in head posture affected swallowing 20) , the path of mandibular movement 3,5) , and activity of head-neck muscles 2,19) . Head posture is also associated with temporomandibular disorders 13) .…”

Section: Introductionmentioning

confidence: 99%

Time Course Analysis of Influence of Food Hardness on Head Posture and Pitching of Head during Masticatory Movement

Shinya

Satô

Hisanaga

et al. 2013

Bull. Tokyo Dent. Coll.

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The purpose of the present study was to investigate the relationship between mastication and head posture using foods with different degrees of hardness. A total of 12 healthy, dentulous volunteers participated in the study. Each participant was required to chew two types of gummy candy with two levels of hardness while sitting upright. Measurements were conducted using an optoelectric jaw-tracking system with 6 degrees of freedom (Gnatho-Hexagraph II JM-2000 ® ). The horizontal plane perpendicular to the direction of gravitational force served as the reference plane. Analysis of the gradient of the Frankfurt plane (head posture) and pitching of the head during masticatory movement was conducted. The influence of the type of test food on these parameters was evaluated during mastication. During stable mastication, the gradient of the Frankfurt plane was 4.66 degrees on average, close to the horizontal plane. The time course of the Frankfurt plane gradient revealed a tendency toward dorsal flexion during the first to middle phases of mastication, and a tendency toward ventral flexion during the middle to last phases, regardless of the hardness of the test food. The participants were divided into two groups based on change in head posture during chewing. The results showed while there was no change in head posture in the group with marked pitching of the head, head posture did change in the group with little pitching.

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“…Há inúmeras argumentações que justificam o efeito da postura da cabeça sobre a postura mandibular (DOMBRADY, 1966;YEMM & BERRY, 1969;YEMM, 1975;LUND et al, 1970;FUNAKOSHI & AMANO, 1973;FUNAKOSHI et al, 1976;WYKE, 1979). A posição elevada e retruída da mandíbula, causada pela posição anterior da cabeça, por exemplo, é justificada como sendo resultado de influências exercidas pela atividade da musculatura mastigatória, be m como pela força de elasticidade dos tecidos moles inseridos na mandíbula.…”

Section: Estudos Sobre Alterações Posicionais Concomitantes Na Colunaunclassified

“…Por outro lado, pesquisadores como LUND et al (1970), FUNAKOSHI e AMANO (1973), FUNAKOSHI et al (1976 e WYKE (1979) acreditam que a postura de cabeça e pescoço possa alterar o padrão postural da mandíbula pela modificação da atividade eletromiográfica dos músculos mastigatórios. Dessa forma, contatos oclusais poderiam ser modificados (COHEN, 1957;LATIF, 1957;PRIESKEL, 1965).…”

Section: Estudos Sobre Alterações Posicionais Concomitantes Na Colunaunclassified

“…SCHWARZ (1927 e PRIESKEL (1965) sugeriram que a extensão da cabeça aumenta a tensão da musculatura supra-hióidea, o que causa tração da mandíbula para trás e para baixo. FUNAKOSHI et al (1976) Entretanto, BOYD et al (1987) discordaram desses achados e demonstraram que a flexão, ao invés da extensão, aumenta a atividade eletromiográfica dos músculos masseteres.…”

Section: Estudos Sobre Alterações Posicionais Concomitantes Na Colunaunclassified

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Avaliação global da postura ortostática de indivíduos portadores de distúrbios internos da articulação temporomandibular : aplicabilidade de métodos clínicos, fotográficos e radiográficos

Munhoz¹

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Relations Between Occlusal Interference and Jaw Muscle Activities in Response to Changes in Head Position

Cited by 92 publications

References 6 publications

Radiographic evaluation of cervical spine of subjects with temporomandibular joint internal disorder

Radiographic evaluation of cervical spine of subjects with temporomandibular joint internal disorder

Time Course Analysis of Influence of Food Hardness on Head Posture and Pitching of Head during Masticatory Movement

Avaliação global da postura ortostática de indivíduos portadores de distúrbios internos da articulação temporomandibular : aplicabilidade de métodos clínicos, fotográficos e radiográficos

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