{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T12:19:46Z","timestamp":1763036386495,"version":"build-2065373602"},"reference-count":4,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2009,5,1]],"date-time":"2009-05-01T00:00:00Z","timestamp":1241136000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["aao-hnsfjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Otolaryngol.--head neck surg."],"published-print":{"date-parts":[[2009,5]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To identify anatomic and radiologic landmarks to assist with frontal sinus surgery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design<\/jats:title><jats:p>Retrospective review.<\/jats:p><\/jats:sec><jats:sec><jats:title>Subjects and Methods<\/jats:title><jats:p>Sinus CT scans of 50 patients were evaluated with respect to a new radiologic and anatomic landmark, the ethmo\u2010frontal angle (EFA).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Right\u2010sided EFA ranged from 135 to 171 degrees. Left\u2010sided EFA ranged from 136 to 167 degrees. Measurements of both sides displayed a normal distribution. When right and left sides within individuals were compared, there was no correlation to indicate a high degree of variation between any particular patient's right and left side EFA.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The EFA is a new landmark to assist otolaryngologists during surgery on and around the frontal sinus. Normal values for this angle have been presented. Surgeons should be aware that asymmetry in a patient's EFA is common, and each side should be examined individually.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.otohns.2008.12.043","type":"journal-article","created":{"date-parts":[[2009,3,10]],"date-time":"2009-03-10T05:07:36Z","timestamp":1236661656000},"page":"762-763","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The ethmo\u2010frontal angle: A new anatomic and radiologic landmark for use in sinus surgery"],"prefix":"10.1002","volume":"140","author":[{"given":"Samuel S.","family":"Becker","sequence":"first","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery Vanderbilt University Medical Center Nashville TN"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter A.","family":"Beddow","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery Vanderbilt University Medical Center Nashville TN"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James A.","family":"Duncavage","sequence":"additional","affiliation":[{"name":"Department of Otolaryngology\u2010Head and Neck Surgery Vanderbilt University Medical Center Nashville TN"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2009,5]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/00005537-200109000-00020"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.crad.2006.11.010"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.2500\/105065898781390325"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.2500\/ajr.2007.21.3030"}],"container-title":["Otolaryngology\u2013Head and Neck Surgery"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.otohns.2008.12.043","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1016\/j.otohns.2008.12.043","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/aao-hnsfjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1016\/j.otohns.2008.12.043","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T11:52:38Z","timestamp":1760961158000},"score":1,"resource":{"primary":{"URL":"https:\/\/aao-hnsfjournals.onlinelibrary.wiley.com\/doi\/10.1016\/j.otohns.2008.12.043"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,5]]},"references-count":4,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2009,5]]}},"alternative-id":["10.1016\/j.otohns.2008.12.043"],"URL":"https:\/\/doi.org\/10.1016\/j.otohns.2008.12.043","archive":["Portico"],"relation":{},"ISSN":["0194-5998","1097-6817"],"issn-type":[{"type":"print","value":"0194-5998"},{"type":"electronic","value":"1097-6817"}],"subject":[],"published":{"date-parts":[[2009,5]]},"assertion":[{"value":"2008-09-30","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2008-12-18","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2009-05-01","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}