Page 89 - Advanced concepts in orbital wall fractures
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by a Siemens Sensation 64 CT scanner (Siemens Healthcare, Forchheim, Germany). The scanning variables were: slice collimation 20x0.6 mm, 0.75 mm slice thickness, 0.4 mm slice increment, 512x512 matrix, 120 kV, 350 mAs, pitch 0.85, FOV 30 cm, hard tissue convolution kernel H70s and window W1600 L400.
Methods
All reconstructions were done in the dissecting room and circumstances
of an operating theatre were mimicked accurately. On day one, surgeon
LD did all the reconstructions. The orbital titanium mesh plate was
positioned and fixated with one bone screw in the inferior orbital rim for
each fracture. After the reconstruction the cadaver was scanned and the
CT scan presented in the dissecting room in multiplanar reconstruction
(Fig. 1). If the surgeon was satisfied with the reconstruction, and the
implant had restored the anatomical boundaries, the operation was
completed. If the surgeon was unsatisfied, the position of the implant was C altered and another scan taken. This was repeated until the surgeon was 5 satisfied with the final position. After completion, all titanium implants
were removed from the cadaver heads and the drill holes were covered with DuraLay (Reliance Dental Mfg. Co, Worth, Illinois, US).
Intraoperative imaging
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