Use of Nitinol Rods for Lumbosacral Spine Fixation (Prospective Randomized Clinical Study)

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Abstract

One hundred thirty operations were performed in patients (57 males, 73 females) with degenerative lumbar spine diseases during the period from 2010 to 2012. Mean age of patients made up 57 (45-82) years. Depending on the type of intervention all patients were divided into 2 groups: in 60patients (1 st group) dynamic stabilization with nitinol rods without fusion and in 70patients (2 nd group) rigid fixation of lumbar spine with titanium rods was performed. Outcomes were analyzed in 1.5 years after surgery. VAS, ODI and SF36 questionnaires showed improvement of patients’ condition in both groups. Restoration of lordosis was from 22 to 35° and from 23 to 37° in 1 st and 2 nd groups, respectively. No screw instability, bone tissue resorption around the screws and adjacent segment pathology was noted in group 1. Functional X-rays showed preservation of mobility (5+1.2°). In 2 nd group formation of pseudarthrosis was recorded in 5patients, adjacent segment pathology - in 20 including 5 patients who required repeated surgical intervention. Transpedicular lumbosacral spine fixation using nitinol rods is an effective technique that enables to preserve movements in lumbosacral spine in combination with stable fixation

About the authors

S. V Kolesov

Central Institute of Traumatology and Orthopaedics named after N.N. Priorov, Moscow, Russia

V. V Shvets

Central Institute of Traumatology and Orthopaedics named after N.N. Priorov, Moscow, Russia

D. A Kolobovskiy

Central Institute of Traumatology and Orthopaedics named after N.N. Priorov, Moscow, Russia

A. I Kaz’min

Central Institute of Traumatology and Orthopaedics named after N.N. Priorov, Moscow, Russia

Email: kazmin.cito@mail.ru

N. S Morozova

Central Institute of Traumatology and Orthopaedics named after N.N. Priorov, Moscow, Russia

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