Angioarchitecture and morphology of temporomandibular joint of Monodelphis domestica.
The opossum Monodelphis domestica presents movement of the temporomandibular joint (TMJ) reflecting adaptation to eating habits similar to movement in humans, but the structure of the TMJ is not yet known. Thus, nine young M. domestica, of both sexes were weighed, anesthetized with xylazine (10 mg kg(-1) ), and ketamine (70 mg kg(-1) ) and processed for: 1. The analyses of the macroscopic angioarchitecture after latex injection, as well as the topography of the TMJ; 2. The analysis of microvascularization after injection of Mercox resin and corrosion of soft tissue with NaOH using scanning electron microscopy and; 3. The histological evaluation of the TMJ with an optical microscope. Macroscopic analysis of the latex injected vessels revealed the distribution of the arteries from the common carotid artery, receiving branches of the superficial temporal and maxillary arteries. The mandibular condyle has the long axis in the lateral-lateral direction, and is convex in the anterior-posterior direction. Its topography was determined in relation to the eye and external acoustic meatus. With scanning electron microscopy, microvascularization consists of arterioles of varying diameter (85-15 µm) of the meandering capillary network in the retrodiscal region, and a network of straight capillaries in the TMJ anterior region. Via light microscopy the TMJ has similar histological features to those of humans. These macroscopic, microscopic and ultrastructural data from TMJ of the M. domestica could be a suitable model for TMJ physiology and pathophysiology studies for then speculate on possible human studies. Microsc. Res. Tech. 79:806-813, 2016. © 2016 Wiley Periodicals, Inc.
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
Matheus Silvestre
MS
Minucci
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
João Paulo Mardegan
JP
Issa
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
Fernando Yukio
FY
Yokoyama
CICO Research Centre, Dental School, Universidad De La Frontera, Temuco, Chile.
Fernando José
FJ
Dias
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
Daniela Mizusaki
DM
Iyomasa
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
Elaine Aparecida Del-Bel Belluz
EA
Guimarães
Department of Anatomy, Institute of Biomedical Sciences, University of Sao Paulo, 2415 Avenida Professor Lineu Prestes, Sao Paulo, SP, 05508-900, Brazil.
Ii-Sei
IS
Watanabe
Department of Morphology, Physiology, and Basic Pathology, Ribeirao Preto Dentistry Faculty, University of São Paulo, Ribeirao Preto, SP, 14040-904, Brazil.
Mamie Mizusaki
MM
Iyomasa
D000818:Animals; D005260:Female; D008297:Male; D008855:Microscopy, Electron, Scanning; D055806:Microvessels / Q000648:ultrastructure*; D048309:Monodelphis / Q000033:anatomy & histology*; D013704:Temporomandibular Joint / Q000033:anatomy & histology / Q000098:blood supply* / Q000648:ultrastructure*
Monodelphis domestica; angioarchitecture; morphology; temporomandibular joint