Document Detail

The vascular relationship between the temporomandibular joint and the middle ear in the human fetus.
MedLine Citation:
PMID:  9973122     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The aim of this work was to clarify the vascular relationships between the middle ear and the temporomandibular joint region during human fetal development. MATERIALS AND METHODS: Light microscopic studies were done on 40 human fetuses from 72 mm crown-rump length (C-R) to 150 mm C-R, which were stained by various methods. Five human fetuses were dissected. Natural latex with industrial coloring was injected through the external carotid artery. All specimens were dissected bilaterally. RESULTS: The limits of the retroarticular region and the fetal tympanosquamosal fissure are shown. The anterior tympanic artery has a variable origin. In most cases, it originates from the maxillary artery; in other cases it originates from the superficial temporal artery or the bifurcation of the external carotid artery. On its way through the retroarticular region, it gives branches to the posterior part of the temporomandibular joint. It progresses along the most lateral part of the tympanosquamosal fissure, dividing into three branches that extend throughout the middle ear. A number of venous spaces in the retroarticular region that constitute the retrodiscal venous plexus. Small venous vessels along the fetal tympanosquamosal fissure accompany the anterior tympanic artery and drain into the retrodiscal venous plexus. CONCLUSIONS: During human fetal development, there is a wide connection across the tympanosquamosal fissure between the middle ear and the temporomandibular joint region. The anterior tympanic artery and its branches, as well as small venous vessels that are connected with the retrodiscal venous plexus, extend along the most lateral part of the fissure.
J R Mérida-Velasco; J F Rodríguez-Vázquez; J A Mérida-Velasco; J Jiménez-Collado
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  57     ISSN:  0278-2391     ISO Abbreviation:  J. Oral Maxillofac. Surg.     Publication Date:  1999 Feb 
Date Detail:
Created Date:  1999-02-24     Completed Date:  1999-02-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  146-53     Citation Subset:  AIM; D; IM    
Department of Morphological Sciences II, University Complutense of Madrid, Spain.
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MeSH Terms
Arteries / embryology
Carotid Artery, External / embryology
Crown-Rump Length
Ear Ossicles / blood supply,  embryology
Ear, Middle / blood supply,  embryology*
Embryonic and Fetal Development
Gestational Age
Maxillary Artery / embryology
Temporal Arteries / embryology
Temporal Bone / blood supply,  embryology
Temporomandibular Joint / blood supply,  embryology*
Temporomandibular Joint Disk / blood supply,  embryology
Veins / embryology
Venules / embryology

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