To estimate posttraumatic enophthalmos using computer-based volume measurement of the orbital fracture to provide information on surgical guidelines.
The fracture volume of orbital wall fractures in 35 patients who did not undergo surgery was measured using a Rapidia work station system. Hertel ophthalmometry, diplopia, and ocular motility were investigated. The fracture volume measurements relative to the intact contralateral orbit were correlated with enophthalmos, diplopia, and ocular motility. Patients were examined at the initial visit, then at 1 week, 1 month, and 3 months.
There was a correlation between the fracture volume and enophthalmos. Late enophthalmos increased in size in proportion to the volume of the fractured site. The predicted orbital fracture volume with an enophthalmos measurement of 2 mm or more was 2.30 ml.
Computer-based measurements of orbital fracture volume can be used to predict overall enophthalmos and provide useful information to surgeons.
"In South Korea, the predicted orbital volume with clinically significant enophthalmos (greater than 2 mm) was found to be 2.30 mL. This volume is sufficiently small and can be underestimated during the period of acute injury because of edema and emphysema . Therefore, enophthalmos is the most significant problem after the reduction of the concomitant orbital floor and medial wall fractures, which are almost always large defects. "
[Show abstract][Hide abstract] ABSTRACT: Background
The objective of this article is to evaluate clinical outcomes of combined orbital floor and medial wall fracture repair using a three-dimensional pre-bent titanium implant in an East Asian population.
Clinical and radiologic data were analyzed for 11 patients with concomitant orbital floor and medial wall fractures. A combined transcaruncular and inferior fornix approach with lateral canthotomy was used for the exposure of fractures. An appropriate three-dimensional preformed titanium implant was selected and inserted according to the characteristics of a given defect.
Follow-up time ranged from 2 to 6 months (median, 4.07 months). All patients had a successful treatment outcome without any complications. Clinically significant enophthalmos was not observed after treatment.
Three-dimensional pre-bent titanium implants are appropriate for use in the East Asian population, with a high success rate of anatomic restoration of the orbital volume and prevention of enophthalmos in combined orbital floor and medial wall fracture cases.
Archives of Plastic Surgery 09/2014; 41(5):480-485. DOI:10.5999/aps.2014.41.5.480
"The repair was designed to be performed by reducing orbital volume with a suitable orbital wall implant. As approximately 2.0 ml increase in orbital volume causes 2.0 mm displacement in depth direction (Ahn et al., 2008) we decided to create a digitally designed and AM'd patient-specific alloplast implant to achieve anatomically correct shape of the orbital wall and appearance of the eye symmetry. "
[Show abstract][Hide abstract] ABSTRACT: About Emerald www.emeraldinsight.com With over forty years' experience, Emerald Group Publishing is a leading independent publisher of global research with impact in business, society, public policy and education. In total, Emerald publishes over 275 journals and more than 130 book series, as well as an extensive range of online products and services. Emerald is both COUNTER 3 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.
[Show abstract][Hide abstract] ABSTRACT: Many methods exist to predict the electromagnetic scattering, but the object material characteristics are key input variables. This paper demonstrates the relationship between the uncertainties in these material characteristics and the accuracies of the scattering predictions. The material characteristics of a given dielectric were measured by two separate X-band waveguide set-ups, Scattering measurements were made of the given dielectric backed with and without a metal square plate at normal incidence. Scattering predictions were calculated with: (1) reflection coefficients from transmission line theory and physical optics; and (2) XPATCH, a high frequency scattering prediction code. It was found that variations in scattering predictions were proportional to variations of the imaginary part of the permittivity. Furthermore, the magnitude of the variations in these corresponded to the relative magnitude of the reflection coefficient
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest; 08/1996
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