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Microfissure in the oval window area

T Harada, I Sando, E N Myers

The Annals of Otology, Rhinology, and Laryngology

|March 1, 1981

Summary

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Microfissures in the human oval window area are found in 25% of temporal bones, increasing significantly after age 40. These rare, spontaneous fractures may have clinical implications.

Area of Science:

Otolaryngology
Anatomy
Histology

Background:

Microfissures in the temporal bone are not fully understood.
The oval window area is a critical region for hearing function.

Purpose of the Study:

To investigate the prevalence and characteristics of microfissures in the human oval window area.
To explore the potential causes and clinical significance of these microfissures.

Main Methods:

Examination of 331 human temporal bones.
Histological analysis of microfissures.
Literature review on temporal bone microfissures.

Main Results:

Microfissures were present in 25% of the examined temporal bones.

Related Experiment Videos

Incidence increased sharply around age 40.

Microfissures were located superior and inferior to the oval window, not extending to the footplate.

Histological appearance was similar to other temporal bone microfissures.

Conclusions:

Nontraumatic spontaneous fracture due to mechanical stress is the most probable cause.
The clinical significance of these microfissures warrants further investigation.