AHMET ÖZAK, CENK YARDIMCI, HATİCE ÖZLEM NİSBET, KAMİL SERDAR İNAL

Treatment of Traumatic Thoracal Instability with Pedicle Screw-Rod Fixation System in a Dog

In this paper, clinical and neurological results of stabilization of a thoracic fracture and luxation with a pedicle screw-rod fixation system (PSRFS) in a dog have been reported. A physical and neurological examination revealed non-ambulatory paraparasis, upper motor neuron lesions of hind limbs which localized the lesion to thoracolumbal vertebra. On the radiographic survey; lateral views of the thoracolumbal region revealed luxation between Thoracal 11-12 (Th11-12) and fracture of end plate of Th11. After laminectomy and discectomy, two Ø 3.5 mm polyaxial pedicle screws were placed to each side of Th11-12 corpus and connected with a rod. The dog was able to stand without any support and was ambulatory with assistance after 6 weeks postoperatively. Full recovery was seen and normal alignment of the luxated vertebrae and fusion was seen on radiographic views on postoperative 6th month. As a conclusion PSRFS can be successfully used in fractures/ luxations of vertebras in large breed dogs. The main disadvantages of the PSRFS are higher cost, limited screw dimensions and variability of pedicle safe corridors.

Bir Köpekte Travmatik Torakal İnstabilitenin Pediküllü Vida Rod Fiksasyon Sistemiyle Tedavisi

Bu yazıda, bir köpekte torakal kırık ve luksasyonun pediküllü vida-rod fiksasyon sistemiyle stabilizasyonunun klinik ve nörolojik sonuçları bildirilmiştir. Fiziksel ve nörolojik muayenede, ambulatorik olmayan paraparazis ve arka bacaklarda torakolumbal vertebrada lokalize olan yukarı motor nöron lezyonu belirlendi. Radyografik görüntülemede; Torakal 11-12 (Th11-12) vertebra arasında luksasyon ve Th11 vertebranın son plağında kırık belirlendi. Laminektomi ve diskektomi sonrasında, iki adet Ø 3.5 mm poliaksiyal pedikül vidası, Th11-12 korpusunun her iki yanına yerleştirildi ve rod ile bağlandı. Köpek, operasyondan sonraki 6. ayda herhangi bir destek almadan ayakta durabiliyor ve yardımla gezebiliyordu, radyografide, lukse olan vertebranın hizasının normal olduğu, vertebrada füzyon ve tamamen iyileşme görüldü. Sonuç olarak, poliaksiyal pedikül vidası rod sistemi büyük ırk köpeklerde vertebra kırık ve luksasyonlarında başarılı bir şekilde kullanılabilir. Bu sistemin temel dezavantajları, maliyetinin yüksek, vida boyutlarının kısıtlı ve pedikül güvenli koridorlarının değişkenlik göstermesidir.

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