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Vol. 65. Issue 4.
Pages 237-241 (July - August 2014)
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Vol. 65. Issue 4.
Pages 237-241 (July - August 2014)
Original article
Peculiarities in the Development of the Superior Semicircular Canal
Peculiaridades en el desarrollo del canal semicircular superior
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Carmen Yusa, Ana I. Cisnerosb,
Corresponding author
aicisner@unizar.es

Corresponding author.
, Jesús Obónb, Rafael Crovettoc, Jesús Frailed, Miguel A. Crovettoe, Jaime Whyteb
a Servicio de Anatomía Patológica, Hospital Universitario Miguel Servet, Zaragoza, Spain
b Departamento de Anatomía e Histología Humanas, Universidad de Zaragoza, Zaragoza, Spain
c Clínica Bilbao, Bilbao, Vizcaya, Spain
d Servicio de Otorrinolaringología, Hospital Universitario Miguel Servet, Zaragoza, Spain
e Servicio de Otorrinolaringología, Hospital de Basurto, Bilbao, Vizcaya, Spain
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Table 1. Distribution of the Type of Canal During its Ossification.
Abstract
Objective

Our objective was to study the ontogeny of the superior semicircular canal in order to describe its peculiarities.

Methods

We analysed 76 series of human embryos aged between 32 days (6mm) and newborns. The samples were cut serially and stained using Martin's trichrome technique.

Results

In semicircular canal development there were a number of peculiarities, such as: a defined chronological sequence of osteogenesis with a variable rate of ossification; the fact that each nucleus of ossification was involved in the formation of one of its covers (the upper in the superficial and the lower in the deep); the appearance of transitory dehiscence; and canal closure by means of bone with laminar pattern, with a minimum thickness of 0.1mm.

Conclusion

The peculiarities in canal development could explain the origin of pathological dehiscence in the canal, whether congenital or acquired.

Keywords:
Ontogeny
Superior semicircular canal
Dehiscence
Human
Resumen
Objetivos

Realizar un estudio sobre la ontogénesis del canal semicircular superior con el fin de describir sus peculiaridades.

Métodos

Para ello se han analizado 76 series embriológicas humanas de edades comprendidas entre los 32 días (6mm) y recién nacidos. Las preparaciones estaban cortadas en serie y teñidas con la técnica de tricrómico de Martins.

Resultados

En el desarrollo del canal semicircular hemos observado una serie de peculiaridades, como: secuencia cronológica definida de su osteogénesis con un ritmo de osificación variable, cada núcleo de osificación interviene en la formación de una de sus cubiertas, el superior de la superficial y el inferior de la profunda; la aparición de una dehiscencia transitoria, y el cierre del canal por hueso de tipo laminar con un grosor mínimo de 0,1mm.

Conclusión

Las peculiaridades en el desarrollo del canal podrían explicar las causas del origen de la dehiscencia patológica del mismo, ya sean congénitas o adquiridas.

Palabras clave:
Ontogenia
Canal semicircular superior
Dehiscencia
Humanos

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