Application of a computer-assisted navigation system (CANS) in the treatment of complicated orbital fractures / 中华医学美学美容杂志

ABSTRACT

Objective To evaluate the effectiveness of computer-assisted navigation system on open reduction as treatment for complicated orbital fractures.Methods The computed tomography (CT) data for 6 patients with complicated orbital fractures were obtained before surgery and imported into the surgical planning software.After 3-dimensional (3D) construction and segmentation,data from the unaffected side were used to guide the reduction data,and surgical simulation was performed.All patients underwent open reduction under the guidance of the navigation system.The segments were then reduced to the predetermined places.CT measurements were used to evaluate navigation accuracy and bone symmetry.Results A fairly accurate match between the intraoperative anatomy and the computed tomography images was achieved through registration,with a systematic error of 1 mm difference.With guidance of the navigation system,open reduction of fractures was performed in all cases.The reduction was checked by postoperative computed tomography scans,with a good match with preoperative planning noted.The maximal deviation between the reduction and preoperative planning was less than 2 mm.The postoperative facial appearance of the patients was clearly improved.Conclusions Navigation-guided open reduction of complicated orbital fractures can be regarded as a valuable treatment option for this potentially complicated procedure.