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Head and neck
Published in David A Lisle, Imaging for Students, 2012
The most common type of orbital fracture is a blowout-type fracture of the orbital floor. Blowout orbital fracture is usually the result of a direct blow with sudden increase of intraorbital pressure producing a fracture of the orbital floor. This fracture may result in downward herniation of orbital contents into the maxillary sinus. Diplopia may occur due to entrapment of the inferior rectus muscle in the fracture. Radiographs may show a soft tissue mass in the shape of a ‘teardrop’ in the roof of the maxillary sinus (Fig. 11.3) due to downward herniation of orbital fat. The actual fracture is usually quite difficult to see radiographically. Coronal plane CT shows the fracture, as well as herniation of orbital structures into the maxillary sinus (Fig. 11.4).
Technical queries of a 3D design custom-made implant made from titanium particles for maxillofacial bone reconstruction
Published in Particulate Science and Technology, 2020
G. Armencea, C. Cosma, C. Dinu, F. Onisor, M. Lazar, P. Berce, N. Balc, M. Baciut, S. Bran
The surgery was performed in general anesthesia via orotracheal intubation. The approach was done through the infraorbital scar, exposure of the bone defect was then performed, and dissection of the orbital content preserving the infraorbital nerve. Releasing of entrapped inferior rectus muscle was performed and the implant plus the titanium mesh were fixed into the defect with titanium screws subsequently. The periosteum was approximated to the implant site, muscle and skin closure was then performed. A force duction test was carried out and it was within normal parameters. Total time of surgery was 2 h and 17 min from incision to closure of the defect. Dacryocystorhinostomy and nasolacrimal stenting were done to resolve the epiphora.