Introduction: One of the urgent tasks of the modern neurosurgery is to increase the quality of the surgical care for patients with posttraumatic defects and deformations of the orbit. The area of damaged bone structure orbital requires the primary reconstruction of the defects by using the autografts, implants and metal. The size and location of the implant plays a great role in restoration of the right anatomy of the bone structures in the zygomaticoorbital complex. Procedure of the frameless navigation is one of the ultimate solutions for this problem.

Materials and methods: 20 reconstructive operations with orbital posttraumatic defects had been performed in our clinic. In the preoperative period CT-scan had been performed. The CT-scan data were loaded into the database of the neuro-navigation equipment. The layer construction of the virtual model of the missing fragments in bone structures of the orbit were performed on the axial sections. The check of the installed implant shape has been made intraoperative by using the pointer of the navigation equipment so that each point on the surface of the implant makes a similar point coincided with the ‘virtual model’, displayed on the display.

Results: All patients have recovered the correct anatomy of the zygomaticoorbital complex.

Conclusion: There is no need to produce a stereolithographic model to create a virtual model of the eye socket. The virtual bone defects simulation of the orbit takes about 20 min. The method of the frameless navigation makes possible to reproduce most accurately the shape, the size and the position of the bone fragments and implants after elimination of the deformation and orbital defects. This allows to achieve high functional and aesthetic results.

Key word: frameless navigation