Aims and objectives : To define multi-layer spiral CT and cone beam CT capabilities and limitations in postoperative treatment of deficiency and deformities of the orbit floor control.
Materials and methods : 30 patients (22 males, 8 females; age 21–45) with posttraumatic deformities of midface accompanied by inferior orbit wall deformation and/or deficiency were examined on multi-layer spiral CT (Philips Brilliance 64) and Cone Beam CT (I-CAT). For deficiency/deformity of inferior orbit wall correction were used: autoplast – 12 (40.0%), Medpor – 8 (26.7%), Martin – 2 (6.7%), polytetrafluoroethylene – 1 (3.3%), silicone – 1 (3.3%), filling bomb – 2 (6.7%), nonlatching reposition – 4 (13.3%). The clinical trial was leaded on the 1–3 days and in a month after the operative treatment.
Results : According to the imaging examination 9 patients had unacceptable results after the surgical treatment (30%). Among the verified on multi-layer spiral CT and cone beam CT complications are: bony deformity under correction, incorrect arrangement and/or loosely adaptation between the transplant and the bone. Additionally, multi-layer spiral CT allowed to verify soft tissues interposition in the space between the transplant and the bone, any changes in the eye bulb, optic nerve and oculomotor muscles.
Conclusion : Multi-layer spiral CT is the selection method for the facial skull postoperative control. Cone beam CT allows to evaluate the transplant and bone changes, but it cedes in visualization of soft tissues and other low-contrast objects.