{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T01:51:27Z","timestamp":1769133087563,"version":"3.49.0"},"reference-count":0,"publisher":"Caleo","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Int Adv Otol."],"abstract":"<jats:p>Objective: Anatomical information regarding the eustachian tube (ET) is limited; therefore, more detailed analytical data on ET structure is needed when planning surgical treatments involving the temporal bone.\n\nMethods: We examined the bony structure of the middle ear and ET in 30 Japanese donor cadavers (71-97 years old at the time of death) both macroscopically and with cone-beam computed tomography. Each ET was reconstructed in 3 dimensions, and the structure and correlations of ET element measurements, identified via principal component analysis, were analyzed.\n\nResults: Delineation between bony and cartilaginous zones appeared unclear, and the space between ET cartilage and the carotid canal was narrow. We observed stenosis of the ET bony canal in 43.3% of the specimens (n\u2009=\u200930). In 50% of the specimens, the position of the ET bony canal was depressed at the pharyngeal orifice of the auditory side of the tube, and the middle region was a roundish structure. The lateral and central regions of the bony canal were related to the ET bony canal structure.\n\nConclusion: The close proximity of the ET bony canal to the carotid canal is an important anatomical and morphological finding. Pre-surgical 3D modeling of the middle ear structure, or at a minimum, of the central region of the middle ear canal, may provide useful information for planning procedures that involve the ET.\n\nCite this article as: Asaumi R, Sato I, Kawai T, et al. Morphological observations of the bony canal structure of the eustachian tube in elderly human cadavers with cone-beam computed tomography and principal component analysis. J Int Adv Otol. 2021; 17(2): 134-44.<\/jats:p>","DOI":"10.5152\/jiao.2021.0058","type":"journal-article","created":{"date-parts":[[2021,4,17]],"date-time":"2021-04-17T03:44:58Z","timestamp":1618631098000},"page":"134-144","source":"Crossref","is-referenced-by-count":0,"title":["Morphological Observations of the Bony Canal Structure of the Eustachian Tube in Elderly Human Cadavers With Cone-Beam Computed Tomography and Principal Component Analysis"],"prefix":"10.65717","volume":"17","author":[{"given":"Rieko","family":"Asaumi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taisuke","family":"Kawai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shinichi","family":"Kawata","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takuya","family":"Omotehara","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shintaro","family":"Kondo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masahiro","family":"Itoh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"55248","published-online":{"date-parts":[[2021,3,1]]},"container-title":["The Journal of International Advanced Otology"],"original-title":[],"link":[{"URL":"https:\/\/www.advancedotology.org\/index.php\/pub\/article\/download\/1453\/1451","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.advancedotology.org\/index.php\/pub\/article\/download\/1478\/1475","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.advancedotology.org\/index.php\/pub\/article\/download\/1478\/1475","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T10:44:12Z","timestamp":1769078652000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.advancedotology.org\/index.php\/pub\/article\/view\/1478"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,1]]},"references-count":0,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2021,4,14]]}},"URL":"https:\/\/doi.org\/10.5152\/jiao.2021.0058","relation":{},"ISSN":["2148-3817"],"issn-type":[{"value":"2148-3817","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,1]]}}}