Three-dimensional（3D）reconstruction of the orbit is challenging. Herein, we report three cases of 3D orbital reconstruction using split-thickness calvarial bone after orbital bone resection during neurosurgery.
The frontal bone removed during tumor resection was split into inner and outer plates. The orbital bar was reconstructed using the inner or outer plate with a titanium plate that had been pre-formed using a 3D model as a template. The lateral and superior walls were then reconstructed by placing two bone plates against the curve of the reconstructed orbital rim. We compared and evaluated the eye position and orbital volume using preoperative and postoperative computed tomography and software.
All patients showed preoperative ocular protrusion (mean = 4.34 mm). However, the eye position improved postoperatively (mean protrusion = 0.98 mm). The difference in the postoperative orbital volume between the affected and unaffected sides was < 0.5 cm3 in the two cases in which the 3D model was used and －3.47 cm3 in the case in which the 3D model was not used.
The smaller change in orbital bone volume using the 3D model suggests that the use of a 3D model was useful in accurately reproducing the 3D structures.
