Some morphological details of the endochondral layer of labyrinthine bone

1980 ◽  
Vol 226 (4) ◽  
pp. 239-250 ◽  
Author(s):  
Alexander Rauchfuss
Keyword(s):  
Endochondral Layer

scholarly journals Tomographic diagnosis and relevant aspects of otosclerosis

2013 ◽  
Vol 46 (5) ◽  
pp. 307-312 ◽  
Author(s):  
Juliana Oggioni Gaiotti ◽  
Natália Delage Gomes ◽  
Ana Maria Doffémond Costa ◽  
Caroline Laurita Batista Couto Villela ◽  
Wanderval Moreira ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Hearing Loss ◽  
Differential Diagnosis ◽  
Multidetector Computed Tomography ◽  
Surgical Planning ◽  
Otic Capsule ◽  
Metabolic Derangement ◽  
Pictorial Essay ◽  
Temporal Bone Anatomy ◽  
Endochondral Layer

A literature review and pictorial essay were developed to discuss the importance of knowing the main findings and locations of otosclerosis at multidetector computed tomography (MDCT). The authors performed a retrospective review of cases of otosclerosis diagnosed in their institution by means of high resolution multidetector computed tomography. Otosclerosis corresponds to otic capsule dysplasia characterized by metabolic derangement of its endochondral layer. Such condition constitutes a relevant cause of sensorineural hearing loss, affecting about 7% to 10% of the general population. The diagnosis is usually clinical, but imaging methods play a significant role in the anatomical detailing, differential diagnosis, surgical planning and evaluation of postoperative complications. Among such methods, the relevance of MDCT is highlighted. Radiologists should be familiar with the MDCT findings of otosclerosis, as well as with the temporal bone anatomy to assist in the appropriate clinical management of this disease.

Osteogenesis Imperfecta Congenita and Tarda: A Temporal Bone Report

1975 ◽  
Vol 84 (3) ◽  
pp. 350-358 ◽  
Author(s):  
Joan T. Zajtchuk ◽  
John R. Lindsay
Keyword(s):  
Hearing Loss ◽  
Osteogenesis Imperfecta ◽  
Temporal Bone ◽  
Histological Examination ◽  
Conductive Hearing Loss ◽  
Conductive Hearing ◽  
Osteogenesis Imperfecta Congenita ◽  
Endochondral Layer

The temporal bone report of an operated case of osteogenesis imperfecta tarda is presented. Histological examination confirmed the presence of bilateral fixation of the footplate by otosclerosis as the cause of the conductive hearing loss. Fragility of bony septae in the mastoid and of the stapedial crura were observed. Sensorineural impairment in later years with a reduction in neural elements in the cochlea appear related to the extent and activity of the otosclerotic foci. Additional temporal bone reports of three cases of osteogenesis imperfecta congenita show lack of deposition of the skein-like bone in the endochondral layer, sparse bony septae in marrow spaces and deficiency of the periosteal layer. The stapedial crura were thin and in two cases both were deformed and fractured.

A topographical analysis of the post-natal bone growth in the cochlea of the dog

1997 ◽  
Vol 111 (1) ◽  
pp. 23-29
Author(s):  
M. Roberto ◽  
A. Favia ◽  
E. Lozupone
Keyword(s):  
Bone Growth ◽  
Topographical Analysis ◽  
Temporal Bones ◽  
Bone Deposition ◽  
Endochondral Layer

AbstractThe distribution of post-natal bone deposition was examined in the cochlea of 10-, 25-, 50- and 90-day-old dogs that had been intraperitoneally injected with tetracycline (20 mg/kg) five days before sacrifice. The temporal bones were embedded in methylmethacrylate and sectioned in a single mid-modiolar section 30 μm thick. The post-natal bone deposition occurs both on the periosteal surfaces and on the vascular canals of the endochondral layer until the age of 90 days. Scattered bone deposition is also shown on the endosteal layer of the three turns and on the spiral lamina until the age of 25 and 10 days respectively. The percentage extension of the osteogenetic fronts shows a higher value at the periosteal layer than at the endochondral or endosteal layers.

The interglobular spaces in the endochondral layer of the osseous labyrinth

1980 ◽  
Vol 107 (4) ◽  
pp. 389-398 ◽  
Author(s):  
A. Rauchfuss
Keyword(s):  
Endochondral Layer

Vascularization of the endochondral layer with respect to the otic capsule

1979 ◽  
Vol 105 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Alexander Rauchfuss
Keyword(s):  
Otic Capsule ◽  
Endochondral Layer

Etiopathogenesis of Otosclerosis: A Hypothesis

1984 ◽  
Vol 93 (1) ◽  
pp. 28-33 ◽  
Author(s):  
T. J. Yoo
Keyword(s):  
Experimental Data ◽  
Autoimmune Disease ◽  
Human Antibody ◽  
Otic Capsule ◽  
Type Ii ◽  
Endochondral Layer

It is hypothesized that otosclerosis is an autoimmune disease in response to native type II collagens of cartilage rests associated with globular ossei in the endochondral layer of the otic capsule. To support this hypothesis animal experimental data and human antibody data are shown.

Early ossification within the human fetal otic capsule: morphological and microanalytical findings

1989 ◽  
Vol 103 (12) ◽  
pp. 1113-1121
Author(s):  
F. Declau ◽  
W. Jacob ◽  
W. Dorrine ◽  
B. Appel ◽  
J. Marquet
Keyword(s):  
Human Fetus ◽  
Polarization Microscopy ◽  
Otic Capsule ◽  
Microchemical Analysis ◽  
Calcified Cartilage ◽  
Transmission Electron ◽  
Combined Use ◽  
Backscattered Electron ◽  
Electron Imaging ◽  
Endochondral Layer

AbstractBesides the use of conventional techniques such as light and polarization microscopy, the present paper proposes the combined use of transmission electron microscopy, secondary and backscattered electron imaging, energy dispersive X-ray analysis and computed tomography for the diagnostic evaluation of ear pathology in the human fetus. These methods were used to revisit the primary calcification front of the fetal otic capsule between 16 and 23 weeks gestational age. Ultramicroscopic evaluation demonstrates similar fetal bone formation to that found in other bones of the human fetus. The formation of the endosteal and periosteal layers is a typical example of early intra-membranous ossification. The enchondral layer is made up of fibrillar bone, laid down around the calcified cartilage remnants. Microchemical analysis indicates a significantly higher Ca/P ratio in the endochondral layer with respect to the endosteum and periosteum. The consequences of a lower Ca/P ratio in the endosteal layer are discussed in view of calcium homeostasis and inner ear function.

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