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Direct measurement of the round window niche dimensions using a 3‐dimensional moulding technique – a human cadaveric temporal bone study
Author(s) -
Shakeel M.,
Spielmann P.M.,
Jones S.E.,
Hussain S.S.M.
Publication year - 2015
Publication title -
clinical otolaryngology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.914
H-Index - 68
eISSN - 1749-4486
pISSN - 1749-4478
DOI - 10.1111/coa.12438
Subject(s) - cadaveric spasm , medicine , round window , margin (machine learning) , anatomy , temporal bone , orthodontics , inner ear , machine learning , computer science
Objectives To directly measure the various dimensions of the RWN focusing on the bony overhang and the vertical height between the free margin of the bony overhang and floor of the niche. Design Laboratory‐based anatomical study using formalin‐preserved human cadaveric temporal bones. Setting Temporal Bone laboratory, Department of Otolaryngology University of Dundee Medical School & Ninewells Hospital, Dundee, UK . Participants NA. Main outcome measures Three measurements were carried out (i) the depth of the round window niche extending from the free margin of the bony overhang to the fundus; (ii) vertical height from the free margin of the overhang to the floor of the niche (entrance) and (iii) the antero‐posterior ( AP ) dimension of the niche. Results Based on mould technique, the three dimensions were calculated as follows: mean bony overhang = 2.1 mm (range 1.9–2.4 mm), height of RWN = 2.0 mm (1.8–2.15 mm) and AP length = 4.0 mm (3.3–4.95 mm). Conclusions Our data demonstrate that the mean dimension of the bony overhang superior to the RWM is 2.1 mm.