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Biomedical subjects

B Ars

Publications and source records attributed to B Ars.

29 records · Page 2Linked to original sources
PubMed1986

The morphogenesis of the tympanic part of the temporal bone.

The aim of this report is to describe the relative movement of the tympanic membrane and its supporting structures during embryonic and postnatal life, leading to its final position in a vertical plane. Previous studies were based on ultra thin sections which led to changes in orientation during development being missed. The importance of the present description is to provide a baseline with which abnormal ear development in certain congenital syndromes may be compared.

Humans↗
PubMed1981

The tympanic cavity: tomographic anatomy.

This study was carried out on 100 tomograms of the petrous bone using Guillen's transorbital view of the anatomy of the middle ear. It provides basic data concerning the morphology, size and surface area of the tympanum, the epitympanum and the hypotympanum. It correlates the surface area of the epi-and hypotympanum, and suggests certain embryological interpretation. This study contributes to the diagnostic radiology of the middle ear in the following ways: I It provides basic data for the interpretation of tomograms in patients with ossicular dislocation. 2 It provides essential data for the radiology of congenital malformation and of tumors. 3 It puts in perspective certain criteria used for the diagnosis of cholesteatoma. Finally, this study justifies the use of preoperative radiological investigation.

Adult↗
PubMed1977

Histopathological research on eardrum perforations.

Basic information on the healing process of tympanic membrane perforations is scarce and sometimes contradictory. So the histological and histopathological course of the closure of tympanic membrane perforations was studied in experiments on mice and hamsters. From this investigations it seems evident that traumatic tympanic membrane perforations close nearly always spontaneously in animals. This fact must be kept in mind in the evaluation of techniques and results of tympanoplasties in animal experiments. Furthermore the squamous epithelium of the eardrum plays an important role in the regeneration of tympanic perforations. The closure of the connective tissue defect has always a tendency to lay behind the healing of the epithelial layer. This mechanism differs from the normal healing process of skin wounds where the squamous epithelium migrates over a newly formed granulation tissue layer. On the basis of these findings some practical considerations can be made on tympanoplasties in human.

Animals↗
PubMedDate not supplied

[Pockets of tympanic membrane retraction].

The pathogenesis of tympanic retraction pockets is analyzed. Middle-ear pressure and the behavior of the lamina propria and stratified squamous epithelium of the tympanic membrane were considered. Predisposing factors are discussed. Conservative surgical treatment is recommended for retraction pockets that are not adhered to the walls of the middle ear. Radical surgery should be reserved for adhered pockets. The management of mastoid cavities is discussed.

Ear Diseases↗