caa a22 4500 606187391 CHVBK 20210128100840.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00405-014-3378-7 doi (NATIONALLICENCE)springer-10.1007/s00405-014-3378-7 Computer-assisted analysis of anatomical relationships of the ethmoidal foramina and optic canal along the medial orbital wall [Elektronische Daten] [Servet Celik, Mehmet Ozer, Zuhal Kazak, Figen Govsa] Typically, the medial orbital wall contains an anterior ethmoidal foramen (EF) and a posterior EF, but may also have multiple EFs transmitting the arteries and nerves between the orbit and the anterior cranial fossa. The aim of this study is to determine a patient-friendly landmark of the medial orbital wall and to specify a precise location of the ethmoidal foramens (EF) in order to standardize certain anatomical marks as safe ethmoidal arteries. Orientation points on the anterior ethmoidal foramen (AEF), posterior ethmoidal foramen (PEF) and middle ethmoidal foramen (MEF) were investigated in 262 orbits. Using a software program, distances between each foramen and the midpoint of the anterior lacrimal crest (ALC), the optic canal (OC), and some important angles were measured. The EFs were identified as single in 0.8%, double in 73.7%, triple 24,4% and quadruple in 1.1% specimens. The mean distances between ALC and AEF, ALC and PEF and ALC and MEF were 27.7, 10.6, and 12.95mm, respectively. The distances from ALC-AEF, AEF-PEF, and PEF-OC were 27.7±2.8, 10.6±3.3, 5.4±1mm. The angles from the plane of the EF to the medial border of the OC were calculated as 13.2° and 153°, respectively. The angle from the AEF to the medial border of the OC was based on the plane between the ALC and AEF was 132°. The occurrence of multiple EF with an incidence of 25% narrows the borders of the safe region in the medial orbital wall. Safe distance of the ALC-EF was measured as 22.1mm on medial wall. The line of the location of the EF was calculated 16.2mm. In this study, it was possible to investigate the variability of the orbital orifice of the EF and the feasibility of the EA, to observe various angles of the orbital wall bones and to calculate the lengths of some parameters with the help of certain software. Springer-Verlag Berlin Heidelberg, 2014 Posterior ethmoidal foramen nationallicence Anterior ethmoidal foramen nationallicence Ethmoidal arteries nationallicence Anterior lacrimal crest nationallicence Orbital surgery nationallicence Orientation points nationallicence Epistaxis nationallicence Intraorbital hematoma nationallicence Surgical anatomy nationallicence Orbit nationallicence Celik Servet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut Ozer Mehmet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut Kazak Zuhal Department of Anatomy, Faculty of Dentistry, Kırıkkale University, Kırıkkale, Turkey aut Govsa Figen Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/11(2015-11-01), 3483-3490 0937-4477 272:11<3483 2015 272 405 https://doi.org/10.1007/s00405-014-3378-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-014-3378-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Celik Servet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 700 1- Ozer Mehmet Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 700 1- Kazak Zuhal Department of Anatomy, Faculty of Dentistry, Kırıkkale University, Kırıkkale, Turkey aut NATIONALLICENCE 700 1- Govsa Figen Department of Anatomy, Faculty of Medicine, Ege University, 35100, Izmir, Turkey aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/11(2015-11-01), 3483-3490 0937-4477 272:11<3483 2015 272 405