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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Avaliação ultrassonográfica da musculatura do sistema estomatognático em indivíduos com disfunção temporomandibular muscular / Ultrasound evaluation the muscle stomatognathic system in individuals with temporomandibular disorder muscle

Lecaros, Antuanett Mercedes Cornejo 16 August 2012 (has links)
A disfunção temporomandibular (DTM) engloba as alterações relacionadas com as articulações temporomandibulares (ATMs), a musculatura mastigatória e demais estruturas do sistema estomatognático apresentando-se na forma de dores nos músculos da mastigação, ATMs, músculos cervicais, reduções e desvios nos movimentos da mandíbula, sons articulares e padrões de oclusão inadequados. É de relevante importância estudar a musculatura mastigatória por causa da grande influência que a mesma tem no sistema estomatognático. O objetivo deste estudo foi analisar a espessura do músculo masseter e temporal, bilateralmente, por meio da ultrassonografia em indivíduos portadores de DTM muscular, com a finalidade de definir o padrão de espessura muscular nesta disfunção. Os resultados deste estudo permitiram a avaliação do sistema estomatognático do ponto de vista funcional em indivíduos portadores de DTM muscular e poderão nortear o cirurgião dentista na elaboração de diagnósticos, prognósticos e planos de tratamento, com ganho de qualidade de vida para seus pacientes. Portanto conclui-se que na condição de repouso como no apertamento em máxima intercuspidação habitual houve uma diminuição da espessura do músculo masseter esquerdo, temporal direito e esquerdo para o grupo com DTM muscular. E com relação ao gênero houve uma diminuição da espessura muscular, tanto para o músculo masseter quanto para o músculo temporal, nas mulheres. / The temporomandibular disorders (TMD) includes changes related to the temporomandibular joints (TMJ), masticatory muscles and other structures of the stomatognathic system presents itself as pain in the masticatory muscles, joints, cervical muscles, cuts and deviations in the movements of jaw joint sounds and patterns of inadequate occlusion. It is of major importance to study the masticatory muscles because of the great influence which it has in the stomatognathic system. The objective of this study was to analyze the thickness of the masseter and temporal bilaterally by ultrasonography in patients with TMD muscle, in order to set the standard for this thick muscle dysfunction. The results of this study will allow assessment of the stomatognathic system\'s functional point of view in individuals with TMD muscle and can guide the dentist in making diagnoses, prognoses and treatment plans, with gains in quality of life for their patients. Therefore it is concluded that at rest as in clenching in maximum intercuspation was a thinning of the left masseter, temporalis left and right for the group with muscular TMD. And with respect to gender there was a decrease in muscle thickness for both the masseter and temporalis muscle for in women.
32

Influência do toro mandibular na atividade eletromiográfica dos músculos da mastigação / Influence of mandibular torus on electromyographic activity of the mastication muscles

Silva, José Mendes da 07 August 2014 (has links)
O toro é uma excrescência óssea convexa, com crescimento lento, considerado de origem congênita, benigno, também denominado de exostose, com pouca significância clínica, sendo necessária sua remoção quando dificulta a confecção de prótese totais, parciais ou removíveis e a posição da língua, interferindo na fala ou ainda, dificultam a intubação cirúrgica. O objetivo deste trabalho foi analisar, por meio da eletromiografia, o padrão de comportamento (morfológico e funcional) da atividade dos músculos masseter e temporal nas condições posturais da mandíbula como o Repouso, Protrusão, Máxima Interscupidação Habitual (MIH), Apertamento Dental com Parafilme M®, Lateralidades Direita e Esquerda. O presente estudo também propôs analisar a eficiência dos ciclos mastigatórios e para tanto, foi utilizado a avaliação da mastigação habitual e não habitual por meio da integral da envoltória do sinal eletromiográfico obtido dos músculos masseter e temporal durante a mastigação habitual de uvas passas e amendoim e da mastigação não-habitual de Parafilme M®, considerando a presença ou não do toro mandibular. Diante dos resultados obtidos no presente trabalho foi possível concluir que, de um modo geral, houve aumento na atividade eletromiográfica nos músculos masseteres de indivíduos portadores de toro mandibular (Grupo Casos) quando comparado aos indivíduos do Grupo Controles nas condições clínicas de protrusão, lateralidades direita e esquerda, máxima intercuspidação habitual (MIH), apertamento dental com parafilme M®. Na mastigação com parafilme M®, mastigação com amendoins e mastigação com uvas passas verificou-se aumento da atividade para os músculos temporais e masseteres, evidenciando que a presença de toro mandibular está associada a alterações no padrão de ativação da musculatura mastigatória nas condições posturais da mandíbula e na mastigação. / The torus is a convex bony outgrowth, considered congenital, benign, also called exostosis, with little clinical significance, necessitating its removal difficult when the making of complete dentures, removable partial or tongue position and interfering speech or hinder surgical intubation. The aim of this study was to analyze, using electromyography, the default behavior (morphological and functional) of activity of the masseter and temporal muscles in conditions mandible posture as Home, protrusion, Maximum Interscupidação Habitual (MIH), Dental Clenching with Parafilm M®, lateral excursion (right and left). This study also proposed to analyze the efficiency of the mastigatory cycles. Therefore, we used the evaluation of usual mastication and unusual mastication through the envoltory integral of the EMG signal obtained from the masseter and temporalis muscles during mastication of raisins and peanuts and unusual chewing Parafilm M®, considering the presence or no in mandibular torus. Given the results obtained in this study it was concluded that, in general, increased the EMG activity in the masseter muscles of patients with mandibular torus (Group Case) when compared to individuals of the Group Controls in the mandible clinical conditions as protrusion, lateral excursion (right and left), maximum intercuspation (MIH), clenching with parafilm M®. There was an increase in EMG activity of the temporal and masseter muscles during mastication with parafilm M®, mastication with peanuts and mastication with raisins, showing that the presence of mandibular torus is associated with changes in the default activation of masticatory muscle in conditions mandible posture and chewing.
33

Response of the human jaw to mechanical stimulation of teeth

Brinkworth, Russell Stewart Anglesey January 2004 (has links)
Animal experiments indicate that the main form of feedback for jaw-closing muscles is from periodontal mechanoreceptors (PMRs). However, due primarily to limitations on methods, this is yet to be confirmed in humans. The main aim of this thesis was to investigate the reflex contribution of PMRs to the human jaws using vertical (axial) stimulation. To this end the electromyographic and bite force responses of the jaw to a number of different mechanical stimulus conditions, delivered to both the upper central incisors and the upper right first molars, were investigated. The principal hypothesis was that PMRs are responsible for the majority of the reflex responses seen in the human jaw muscles. Furthermore this reflex response is modulated by different characteristics of the stimulus such as: rate of rise, maximum force applied, the amount of constant offset force (preload), the level of muscle contraction and also the physical characteristics of the subject's jaw including: dental health and tooth spacing. These studies have contributed towards the understanding of the neuronal wiring and the receptor systems contained in the jaw. The results indicate that PMRs around the incisors are of fundamental importance for the development of reflex patterns but little if any PMR related reflexes exist around the molar teeth. The reflexes originating from the PMRs around the incisors are modulated by different mechanical characteristics of the stimulus, thus helping to explain how the jaw muscles perform numerous and complex patterns of activation which move the jaw in many different ways and develop forces that are optimum for the task at hand. / Thesis (Ph.D.)--School of Molecular & Biomedical Science, 2004.
34

Masticatory dysfunction index design and initial clinical evaluation : a thesis submitted in partial fulfillment ... restorative occlusion /

Nelson, Stanley J. January 1986 (has links)
Thesis (M.S.)--University of Michigan, 1986.
35

The effect of canine guidance angulation on mandibular movements a thesis submitted in partial fulfillment ... prosthodontics and restorative dentistry, crown and bridge ... /

Shea, Joseph Frederick. January 1989 (has links)
Thesis (M.S.)--University of Michigan, 1989.
36

Biofeedback muscle relaxation training for reducing hypertonicity of the masticatory musculature during centric relation manipulation of the mandible a thesis submitted in partial fulfillment ... in periodontics ... /

Appleberry, Eric A. January 1975 (has links)
Thesis (M.S.)--University of Michigan, 1975.
37

Duration of the electromyographic silent period in TMJ dysfunction before and after bite splint therapy a thesis submitted in partial fulfillment .. in dental hygiene education ... /

Beemsterboer, Phyllis. January 1973 (has links)
Thesis (M.S.)--University of Michigan, 1973.
38

Masticatory dysfunction index design and initial clinical evaluation : a thesis submitted in partial fulfillment ... restorative occlusion /

Nelson, Stanley J. January 1986 (has links)
Thesis (M.S.)--University of Michigan, 1986.
39

Effects of occlusal contacts and thickness of athletic mouthguards on the silent period duration during exertion a thesis submitted in partial fulfillment ... in restorative dentistry, occlusion ... /

Chou, Sun-Long. January 1982 (has links)
Thesis (M.S.)--University of Michigan, 1982.
40

Biofeedback muscle relaxation training for reducing hypertonicity of the masticatory musculature during centric relation manipulation of the mandible a thesis submitted in partial fulfillment ... in periodontics ... /

Appleberry, Eric A. January 1975 (has links)
Thesis (M.S.)--University of Michigan, 1975. / eContent provider-neutral record in process. Description based on print version record.

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