Ultrastructural characteristics of the gerbil pterygoid medial muscle after experimental occlusal alteration

Ultrastructural Analysis of Masseter and Left Medial Pterigoid Muscles, After Unilateral Mandibular Molar Extraction: Experimental Study

“…The author's previous study (Benigno et al) showed that the bilaminar zone of the human temporomandibular joint (TMJ), a component of stomatognatic system presents morphological alterations when compared qualitatively structure in young individuals (toothed) and those elderly (edentulous). Animal models as those by Easton & Carson, 1990;Iyomasa et al, 2008Iyomasa et al, , 2009Cvetko et al;Carison & Easton;Benigno et al, have been encouraged due to the limitations of these experiments in humans.…”

“…The MPT and Masseter muscles act synergistically to elevate jaw and contribute to its protrusion. There is a synchrony between masticatory muscles and TMJ in masticatory activity, as related by Iyomasa et al (2008Iyomasa et al ( , 2009, who investigated the ultrastructural and histological effects over the MTP muscle of gerbils in occlusal alterations induced by unilateral extraction. These studies showed, through micrograph data, that unilateral teeth extraction was able to induce modifications in PTM muscle fibres and capillaries.…”

Morphometric analysis of the masseter muscle post unilateral lower molar exodonty: experimental study

“…Morphological analysis has contributed little in change detection of skeletal muscle fibers (CVETKO, KAREN and ERZEN, 2012;IYOMASA, ISSA, SOSTHINES et al, 2009;NISHIDE, BABA, HORI et al, 2001). Due to the need for a study method more objective and accurate, so morphometry has been increasingly used in the evaluation of skeletal muscle fibers (MIEHE, FANGHÄNEL, KUBEIN-MEESENBURG et al, 1999;BAZAN, ISSA, WATANABE et al, 2008;BANI, BANI, BERGAMINI et al, 1999;IYOMASA, ISSA, OLIVEIRA et al, 2008;CAMARGO, VANDERLEI, CAMARGO et al, 2005;ANDREO, OLIVEIRA, NAVARRO et al, 2002).…”

“…The MPT and Masseter muscles act synergistically to elevate jaw and contribute to its protrusion. There is a synchrony between masticator muscles and TMJ in masticatory activity, as related by Iyomasa, Issa, Oliveira et al (2008) and Iyomasa, Issa, Sosthines et al (2009), who investigated the ultrastructural and histological effects over the MTP muscle of gerbils in occlusal alterations induced by unilateral extraction. These studies showed, through micrograph data, that unilateral teeth extraction was able to induce modifications in PTM muscle fibres and capillaries.…”

Efeitos morfofisiológicos do estresse crônico e exodontia em músculo masseter de ratos

“…Essa parafunção dos músculos da mastigação tem despertado interesse nos pesquisadores com o intuito de correlacionar os fatores etiológicos e de compreender os mecanismos pelos quais os músculos se adaptam a essas alterações. Com esse propósito os músculos da mastigação têm sido analisados em diversas condições como, tais como em situações de aumento (KAWASAKI, SAEKI e OHNUKI, 1997;MULLER et al, 2000) ou diminuição da dimensão vertical (MIEHE et al, 1999), após a exodontia (MAEDA et al,1990;BAZAN et al, 2008;IYOMASA et al, 2008;IYOMASA et al, 2009) ou desgaste oclusal (BANI, BANI e BERGAMINI, 1999; BANI e BERGAMINI, 2002) e situações de desordens temporomandibulares (DTM) tratadas com terapias oclusais (KIRVESKARI e JÄMSÄ, 2009), com auxíli de diferentes tipos de metodologias, tais como: histoenzimologia (MAXWELL et al, 1981;MIEHE et al, 1999;KITAGAWA et al, 2004); análise ultraestrutural (BANI, BANI e BERGAMINI, 1999;BANI E BERGAMINI, 2002;IYOMASA et al, 2009); e análise microscópica (ABE et al, 1998;NISHIDA et al, 1999;Nishide, et al, 2001).…”