PMID: 9006358Jan 1, 1997Paper

Postnatal change in angle between the tympanic annulus and surrounding structures. Computer-aided three-dimensional reconstruction study

The Annals of Otology, Rhinology, and Laryngology
A IkuiS Fujita

Abstract

Postnatal developmental relationships in human ears were studied by a computer-aided three-dimensional reconstruction and measurement method. We measured the angle, in reference to the horizontal plane, between the tympanic annulus, the oval window, and the internal auditory canal (IAC) in 20 normal temporal bones obtained from individuals between 1 day old and 76 years old. The horizontal plane was defined as the plane sloped 30 degrees infero-anteriorly from the plane of the horizontal canal in each specimen. The plane of the tympanic annulus changed from a nearly horizontal orientation (34.2 degrees from the horizontal plane) in neonates to a more vertical orientation (63.3 degrees from the horizontal plane) in adults. The tympanic annulus and oval window planes remained at the same angle to each other (11.9 degrees +/- 5.1 degrees) throughout postnatal development, as did the plane of the tympanic annulus and the IAC (68.6 degrees +/- 5.3 degrees). These findings have implications for ear surgeons, especially those operating on young children.

References

May 1, 1986·The Annals of Otology, Rhinology, and Laryngology·I SandoW J Coury
Jul 1, 1986·The Annals of Otology, Rhinology, and Laryngology·T L Eby, J B Nadol

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Citations

Oct 29, 2011·Otolaryngologic Clinics of North America·Gregory J WietDinah Wan
Jul 28, 2016·Journal of the Association for Research in Otolaryngology : JARO·Paritosh PandeStephen A Boppart
Oct 9, 2016·Journal of the Association for Research in Otolaryngology : JARO·Hamid MotallebzadehSam J Daniel
Jan 18, 2007·The Journal of the Acoustical Society of America·Carolina Abdala, Douglas H Keefe
Mar 14, 2007·The Journal of the Acoustical Society of America·Douglas H Keefe, Carolina Abdala
Dec 10, 2008·The Journal of the Acoustical Society of America·Chris A Sanford, M Patrick Feeney
Sep 30, 2005·The Annals of Otology, Rhinology, and Laryngology·Philipp M GruenEdgar Bachor
Oct 25, 2013·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Glenn Isaacson
Apr 13, 2001·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·J Sadé
Aug 1, 2015·Journal of Anatomy·Neal Anthwal, Hannah Thompson
Mar 27, 2009·Ear and Hearing·Beth A PrieveJonathan L Preston
Nov 29, 2014·The Laryngoscope·Olubunmi V AkinpeluSam J Daniel
Jun 11, 2017·International Journal of Audiology·Sreedevi AithalJoseph Kei
Jul 30, 2019·Otolaryngologic Clinics of North America·Kimberly A MillerDaniel J Lee

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