The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Patricia A. Hudgins - One of the best experts on this subject based on the ideXlab platform.
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The sagging Tegmen: Computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, N. Wendell Todd, Patricia A. HudginsAbstract:Background: Low-lying Tegmen often limits surgical access especially for congenital aural atresia, trans-mastoid work at the superior semicircular canal, and placement of middle ear implants. Objective: To quantitatively study the sagging Tegmen to elucidate inter-observer agreement, bilateral symmetry, and its potential correlation with the extent of temporal bone pneumatization. Study Design: Post-mortem material-analysis. Setting: University temporal bone laboratory. Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured. Results: The metrics of sagging Tegmen trended with one another, and the extent of mastoid pneumatization. The closeness of Tegmen with the head of the malleus trended with the axial CT image showing less bone lateral and posterior-lateral to SSCC. For these optimally positioned crania, difficulty of landmark identification may explain the fair-good inter-observer agreements. Conclusion: Sagging Tegmen was associated with a small extent of temporal bone pneumatization. We suggest using whichever metric of sagging involves the site of concern. About one-third of Tegmen sagging can be accounted for by the extent of mastoid pneumatization.
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the sagging Tegmen computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, Wendell N Todd, Patricia A. HudginsAbstract:Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured.
Kevin K. Motamedi - One of the best experts on this subject based on the ideXlab platform.
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The sagging Tegmen: Computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, N. Wendell Todd, Patricia A. HudginsAbstract:Background: Low-lying Tegmen often limits surgical access especially for congenital aural atresia, trans-mastoid work at the superior semicircular canal, and placement of middle ear implants. Objective: To quantitatively study the sagging Tegmen to elucidate inter-observer agreement, bilateral symmetry, and its potential correlation with the extent of temporal bone pneumatization. Study Design: Post-mortem material-analysis. Setting: University temporal bone laboratory. Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured. Results: The metrics of sagging Tegmen trended with one another, and the extent of mastoid pneumatization. The closeness of Tegmen with the head of the malleus trended with the axial CT image showing less bone lateral and posterior-lateral to SSCC. For these optimally positioned crania, difficulty of landmark identification may explain the fair-good inter-observer agreements. Conclusion: Sagging Tegmen was associated with a small extent of temporal bone pneumatization. We suggest using whichever metric of sagging involves the site of concern. About one-third of Tegmen sagging can be accounted for by the extent of mastoid pneumatization.
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the sagging Tegmen computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, Wendell N Todd, Patricia A. HudginsAbstract:Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured.
N. Wendell Todd - One of the best experts on this subject based on the ideXlab platform.
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The sagging Tegmen: Computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, N. Wendell Todd, Patricia A. HudginsAbstract:Background: Low-lying Tegmen often limits surgical access especially for congenital aural atresia, trans-mastoid work at the superior semicircular canal, and placement of middle ear implants. Objective: To quantitatively study the sagging Tegmen to elucidate inter-observer agreement, bilateral symmetry, and its potential correlation with the extent of temporal bone pneumatization. Study Design: Post-mortem material-analysis. Setting: University temporal bone laboratory. Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured. Results: The metrics of sagging Tegmen trended with one another, and the extent of mastoid pneumatization. The closeness of Tegmen with the head of the malleus trended with the axial CT image showing less bone lateral and posterior-lateral to SSCC. For these optimally positioned crania, difficulty of landmark identification may explain the fair-good inter-observer agreements. Conclusion: Sagging Tegmen was associated with a small extent of temporal bone pneumatization. We suggest using whichever metric of sagging involves the site of concern. About one-third of Tegmen sagging can be accounted for by the extent of mastoid pneumatization.
Wendell N Todd - One of the best experts on this subject based on the ideXlab platform.
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the sagging Tegmen computed tomographic analyses
Laryngoscope, 2011Co-Authors: Kevin K. Motamedi, Wendell N Todd, Patricia A. HudginsAbstract:Materials and Methods: From 41 adult crania without clinical otitis, the five with the largest mastoids, and the five with the smallest mastoids, were assessed by high resolution computed tomography, both direct axial and direct coronal. Four quantitative depictions of sagging Tegmen were assessed: a short distance from Tegmen to head of malleus; a short distance from Tegmen to bony external ear canal; and, on the axial image through the top-most portion of lumen of the superior semicircular canal (SSCC), the amounts of bone included in the image directly lateral, and posteriorlateral to the SSCC, were measured.
J Whyte - One of the best experts on this subject based on the ideXlab platform.
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ontogenetic explanation for Tegmen tympani dehiscence and superior semicircular canal dehiscence association
Acta otorrinolaringológica española, 2016Co-Authors: Jesus Jose Fraile Rodrigo, Ana Cisneros, Jesus Obon, Rafael Crovetto, Miguel Angel Crovetto, J WhyteAbstract:Abstract Objectives To analyse the ontogeny of the superior semicircular canal and Tegmen tympani and determine if there are common embryological factors explaining both associated dehiscence. Methods We analysed 77 human embryological series aged between 6 weeks and newborn. Preparations were serially cut and stained with Masson's trichrome technique. Results The Tegmental prolongation of Tegmen tympani and superior semicircular canal originate from the same structure, the otic capsule, and have the same type of endochondral ossification; while the extension of the squamous prolongation of Tegmen tympani runs from the temporal squama and ossification is directly of intramembranous type. The nuclei of ossification of the superior and external semicircular canals and accessory of Tegmen collaborate in the ossification of the Tegmental extension and by growth extend to the Tegmental prolongation. This fact plus the fact that both structures share a common layer of external periosteum could explain the coexistence of lack of bone coverage in Tegmen and superior semicircular canal. Conclusion The development of the semicircular canal and Tegmen tympani could explain the causes of the association of both dehiscences.
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explicacion ontogenica para la asociacion entre dehiscencia del Tegmen tympani y dehiscencia del canal semicircular superior
Acta otorrinolaringológica española, 2016Co-Authors: Jesus Jose Fraile Rodrigo, Ana Cisneros, Jesus Obon, Rafael Crovetto, Miguel Angel Crovetto, J WhyteAbstract:Resumen Objetivos Analizar la ontogenia del canal semicircular superior y del Tegmen tympani y determinar si hay factores embriologicos comunes que expliquen la dehiscencia asociada de ambos. Metodos Se han analizado 77 series embriologicas humanas de edades comprendidas entre las 6 semanas y recien nacidos. Las preparaciones estaban cortadas en serie y tenidas con la tecnica de tricromico de Martins. Resultados La prolongacion Tegmentaria del Tegmen tympani y el canal semicircular superior se originan de la misma estructura, la capsula otica, y poseen el mismo tipo de osificacion endocondral; mientras que la prolongacion escamosa del Tegmen tympani se desarrolla desde la escama del temporal y su osificacion es de tipo directa o intramembranosa. En la osificacion de la prolongacion Tegmentaria colaboran los nucleos de osificacion de los canales semicirculares superior, externo y accesorio del Tegmen, los cuales por crecimiento se extienden hasta la prolongacion Tegmentaria, este hecho sumado a que ambas estructuras comparten una capa comun de periostio externo podria explicar la coexistencia de falta de cobertura osea en el Tegmen y en el canal. Conclusion El desarrollo del canal semicircular y Tegmen tympani podrian explicar las causas de la asociacion de ambas dehiscencias.
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association between Tegmen tympani status and superior semicircular canal pattern
Otology & Neurotology, 2016Co-Authors: J Whyte, Ana Cisneros, Rafael Crovetto, M T Tejedor, Jesus Fraile, L V Monteagudo, Ana Whyte, Miguel Angel CrovettoAbstract:Objective:Detecting and quantifying the possible association between Tegmen tympani (TT) status and superior semicircular canal (SSC) pattern.Design:Observational study.Setting:Study conducted in three tertiary Spanish hospitals.Patients:Nonselected consecutive patients of all ages (607 temporal bon
