title: CT-Based Morphological Analysis of Isolated Inferior and Medial Blow-out Orbital Fractures in Korean Adults.
abstract: OBJECTIVE
  To evaluate morphologic differences in isolated inferior medial orbital wall fractures (OWF) based on computed tomography scans.
  
  
  METHODS
  This was a retrospective observational case study of 22 patients with an isolated inferior OWF and 32 patients with an isolated medial fracture between January 2008 and August 2010. We analyzed patient demographics and bony radiologic characteristics on CT scans, including the length and height of the lamina papyracea, the number of ethmoid air cell septa, the length of the anterior and posterior border of the orbital floor, the thickness of the orbital floor maxillary bone, and the axial length of the eyeball.
  
  
  RESULTS
  There were no significant differences in sex, laterality, or concomitant intraocular injury between the two groups. The anteroposterior length (p = 0.391), the number of ethmoid septa (p = 0.869), and the thickness of the orbital floor (p = 0.419) did not differ significantly. The anterior (p < 0.001) or posterior (p = 0.014) height of the lamina papyracea, the lamina papyracea area (p < 0.001), and the lamina papyracea area/ethmoid air cell septa (p = 0.024) were significantly higher in the medial OWF group, while the anterior (p = 0.026) or posterior (p < 0.001) border length of the orbital floor and the axial length (p = 0.047) and volume (p = 0.034) of the eyeball were longer and smaller, respectively, in the inferior OWF group.
  
  
  CONCLUSIONS
  Patients with a longer anterior or posterior border of the orbital floor, a shorter axial length, and a smaller eyeball volume are more likely to incur an isolated inferior OWF than an isolated medial OWF.
authors.affiliation: a Department of Ophthalmology , College of Medicine, Kosin University , Busan , Korea .
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Lee
authors.affiliation: b BGN Eye Clinic , Seoul , Korea .
authors.forename: Jung Joo
authors.initials: JJ
authors.lastname: Lee
authors.affiliation: a Department of Ophthalmology , College of Medicine, Kosin University , Busan , Korea .
authors.forename: Seung Uk
authors.initials: SU
authors.lastname: Lee
authors.affiliation: a Department of Ophthalmology , College of Medicine, Kosin University , Busan , Korea .
authors.forename: Ki Yup
authors.initials: KY
authors.lastname: Nam
authors.affiliation: c Department of Otolaryngology , College of Medicine, Kosin University , Busan , Korea .
authors.forename: Jae Hwan
authors.initials: JH
authors.lastname: Kwon
authors.affiliation: d Department of Plastic & Reconstructive Surgery , College of Medicine, Kosin University , Busan , Korea , and.
authors.forename: Jin Hyung
authors.initials: JH
authors.lastname: Park
authors.affiliation: a Department of Ophthalmology , College of Medicine, Kosin University , Busan , Korea .|e Institute for Medicine, Kosin University , Busan , Korea.
authors.forename: Sang Joon
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D000328:Adult; D044466:Asian People / Q000208:ethnology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009915:Orbit / Q000000981:diagnostic imaging*; D009917:Orbital Fractures / Q000000981:diagnostic imaging* / Q000208:ethnology; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
keywords: Axial length; blow-out fracture; ocular trauma; orbit; orbital wall fracture