[Orbital volume measurement of enophthalmos of orbital blowout fractures].
OBJECTIVE
To measure the volumetric changes of enophthalmos of orbital blowout fractures, and to study the relation between the change of the orbital volume and the degree of enophthalmos.


METHODS
In 16 patients with enophthalmos of orbital blowout fractures, the measurement of orbital volume was carried out during 3 months to 2 years after injury by using the computed tomography (CT), computer image processing and computer orbital three-dimensional measuring method. The relation between the orbital volume discrepancy and enophthalmos was assessed by using Pearson correlation coefficients.


RESULTS
There were significant linear correlation between the increment of the orbital volume and the degree of enophthalmos (r = 0.95, P < 0.001), with each 1.0 cm(3) increment in bony volume causing approximately 0.9 mm of enophthalmos.


CONCLUSIONS
Orbital blowout fractures can expand the orbital volume. The measurement of orbital volume may predict the risk and the final degree of the enophthalmos at the late stage, thus it may provide useful information in surgical intervention to estimate the size and volume of the orbital implant for an individual case.
Fan
Xianqun
X
Department of Ophthalmology, The Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.fanxq@public7.sta.net.cn
Shen
Qin
Q
Li
Haisheng
H
Wei
Min
M
Zhang
Disheng
D
D000293:Adolescent; D000328:Adult; D015841:Enophthalmos / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D009915:Orbit / Q000473:pathology*; D009917:Orbital Fractures / Q000473:pathology*; D014057:Tomography, X-Ray Computed