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- 저자 : Yoong Celine S.Y. (검색결과 1 건)
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Mapping the Posterior Ledge and Optic Foramen in Orbital Floor Blowout Fractures
Wong Yu Cong,Goh Doreen S.L.,Yoong Celine S.Y.,Ho Cowan,Cai Elijah Z.,Hing Angela,Lee Hanjing,Nallathamby Vigneswaran,Yap Yan L.,Lim Jane,Gangadhara Sundar,Lim Thiam C. 대한성형외과학회 2023 Archives of Plastic Surgery Vol.50 No.4
Background The posterior ledge (PL) is a vital structure that supports the implant posteriorly during orbital floor reconstruction. This study describes a technique for mapping the PL in relation to the infraorbital margin (IM) in patients with orbital floor blowout fractures. This study establishes the location of the optic foramen in relation to the PL. Methods Facial computed tomography (FCT) scans of 67 consecutive patients with isolated orbital floor blowout fractures were analyzed using Osirix. Planes of reference for orbital fractures, a standardized technique for performing measurements on FCT, was used. Viewed coronally, the orbit was divided into seven equal sagittal slices (L1 laterally to L7 medially) with reference to themidorbital plane. The distances of PL from IM and location of optic foramen were determined. Results The greatest distance to PL is found at L5 (median: 30.1mm, range: 13.5– 37.1mm). The median and ranges for each slice are as follows: L1 (median: 0.0mm, range: 0.0–19.9mm), L2 (median: 0.0mm, range: 0.0–21.5mm), L3 (median: 15.8mm, range: 0.0–31.7mm), L4 (median: 26.1mm, range: 0.0–34.0mm), L5 (median: 30.1mm, range: 13.5–37.1mm), L6 (median: 29.0mm, range: 0.0– 36.3mm), L7 (median: 20.8mm, range: 0.0–39.2mm). The median distance of the optic foramen from IM is 43.7mm (range: 37.0– 49.1) at L7.
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