The Predictive Value of the Load Sharing Classification Concerning Sagittal Collapse and Posterior Instrumentation Failure: A Systematic Literature Review.

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Abstract

Conflict of interest statement: Declaration of Conflicting Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. 6. Rev Bras Ortop. 2015 Nov 17;45(3):236-40. doi: 10.1016/S2255-4971(15)30363-3. eCollection 2010 May-Jun. THORACOLUMBAR BURST FRACTURE: LOAD SHARING CLASSIFICATION AND POSTERIOR INSTRUMENTATION FAILURE. Avanzi O(1), Landim E(2), Meves R(3), Caffaro MF(4), de Albuquerque Araujo Luyten F(5), Faria AA(5). Author information: (1)PhD. Adjunct Professor in the Department of Orthopedics and Traumatology, School of Medical Sciences, Santa Casa de Sao Paulo. (2)Senior Consultant in the Spine Group, Department of Orthopedics and Traumatology, School of Medical Sciences, Santa Casa de Sao Paulo. (3)PhD. Assistant Professor in the Department of Orthopedics and Traumatology, School of Medical Sciences, Santa Casa de Sao Paulo. (4)PhD. Professor and Instructor in the Department of Orthopedics and Traumatology, School of Medical Sciences, Santa Casa de Sao Paulo. (5)Resident Physicians in the Department of Orthopedics and Traumatology, School of Medical Sciences, Santa Casa de Sao Paulo. OBJECTIVES: To assess the relationship between sagittal collapse, posterior instrumentation failure and the McCormack classification among patients with thoracolumbar burst fractures who had undergone posterior arthrodesis more than one level above and one level below the fracture. METHODS: This was a retrospective review based on the medical records and radiographs of 26 patients who underwent operations between January 1990 and December 2006. The parameters assessed were: worsening of kyphosis (Cobb), neurological dysfunction (Frankel) and failure of surgical treatment (implant breakage or loosening). RESULTS: No relationship was found between sagittal collapse and the scoring in the McCormack classification (r = 0.221; P = 0.322). There was also no relationship between failure of the posterior implant and the scoring in this classification (p = 0.85). CONCLUSION: Our findings suggest that this classification is not applicable to patients who underwent arthrodesis more than one level above and one level below the fracture. DOI: 10.1016/S2255-4971(15)30363-3 PMCID: PMC4799079