CREATED BURST FRACTURE MODEL FOR BIOMECHANICAL STUDIES
Journal Title: Journal of Turkish Spinal Surgery - Year 2005, Vol 16, Issue 2
Abstract
INTRODUCTION: The investigators have managed many biomechanical experimental studies in this field in order to discover which treatment modality is the best. The aim of this study is to create a burst fracture model using a new apparatus followed by to prove its activity in order to use in biomechanical studies. MATERIALS AND METHODS: Eleven thoracolumbar spinal specimens from eleven calves were retrieved from an abattoir. Our design apparatus was used in order to create experimental burst fractures. This apparatus consists of two cylindrical steel bars with closed top, and two steel pistons with closed bottom. The steel bars are able to move through the steel pistons. Axial compression force was applied on each specimen through the apparatus average 17250 Newton (N) (range 16000-18500 N) in load by hydraulic materialtesting machine. RESULTS: Fracture was confirmed on each specimen according to both macroscopically as hearing a "clic" sound and as reaching of the maximum load of test machine. All specimens were then evaluated with anteroposterior and lateral plain radiographs, and computed tomography (CT) seans. Plain radiographs showed widening of the interpedicular distance, flattening of the body height, and presence of segmental kyphosis. CT scan showed failure of anterior and middle column, and retropulsed bone fragment in the spinal canal. In addition posterior column was disrupted on some specimens which was indicated unstable burst fractures. CONCLUSION: There has been a number of burst fracture model in literature. One of them was dropping a mass from the height onto the vertebra specimen. Others were that sudden compression on which specimen was mounted in the test machine, or the corpectomy models. Our model was created in which specimen was subjected gradual compression using hydraulic material-testing machine. We use presented burst fracture model in the biomechanical studies as an alternative method.
Authors and Affiliations
Mustafa TÜRKER, Gündüz TEZEREN (Cumhuriyet University, Turkey), Mehmet TÜKENMEZ, S›tk› PERÇiN
Keywords
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