Thoracic and Lumbar Spine Fractures and Dislocations: Assessment and Classification Jim A. Youssef, M.D. Original Authors: Christopher Bono, MD and Mitch Harris, MD; March 2004 Jim A. Youssef, MD; Revised January 2006 and May 2011 Anatomy of Thoracic Spine • Kyphosis is natural alignment • Narrow spinal canal • Facet orientation • Rib factor on stability • Conus at T12-L1 Anatomy of Lumbar Spine • Lordosis is natural alignment • Larger vertebral bodies • Facet orientation • Cauda equina Thoracolumbar Junction Transition Zone Kyphosis Lordosis Mechanical Difference: Lumbar spine less stiff in flexion Transition Zone: Predisposed to Failure Little opportunity for force dispersion Central loading of T-L junction Not anatomically disposed to transfer force Patient Evaluation • Pre-hospital care • EMT personnel – Initial assessment – Transport and immobilization Patient Evaluation • • • • ABC’s of Trauma History Physical Examination Neurological Classification Clinical Assessment • Inspection • Palpation • Neurological Evaluation – ASIA Impairment Scale • Sensory Evaluation • Motor Evaluation • Reflex Evaluation – Bulbocavernosus, Babinski Clinical Assessment • Associated Injuries – Meyer, 1984 – 28% have other major organ system injuries – Noncontiguous spine fractures 3-56% – Always monitor Hematocrit – GU: Foley recommended, check post-void residuals, if abnormal get cystometrogram – GI: prepare for ileus. Radiographic Evaluation • Trauma series includes: lateral cervical, chest, lateral thoracic, A/P and lateral lumbar and A/P pelvis • Obtunded patients require further skeletal survey – Mackersie et al J Trauma 1988 Additional Imaging • CT scan – bony injuries • MRI – images spinal cord, intervertebral discs, ligamentous structures CT Scan • L3 unstable burst fracture MRI Scan • Thoracic fracture subluxation with increased signal in conus medullaris Thoracolumbar Fractures Controversies CLASSIFICATION!!!!! Indications for surgery Optimal time for surgery Best approach for surgery Classifications Necessary for…… • • • • Uniform method of description Directing treatment *** Facilitating outcome analysis Should be: Comprehensive Reproducible Usable Accurate Böhler 1930 • Importance of injury mechanism • Determines proper reduction maneuver • Evaluated fractures using: • Plain roentgenograms, anatomic dissection of fatalities • 6 types of spinal fractures included in system • • • • • • Compression Flexion Extension Lateral flexion Shear Torsional Böhler, Verlag von Wilhem Maudrich 1930 Böhler, Fractures and Dislocation of the Spine, 1956 Morphologic Classification Watson-Jones 38 • Descriptive terms based on 252 films – 7 types Examples: – Wedge fracture (compression fx) – Comminuted fracture (burst fx) – Fracture dislocation CT evolved MRI evolved 1930 ‘40 Morphologic Classification ‘50 ‘60 ‘70 ‘80 ‘90 * 2000 ‘10 Morphologic Classification Stable vs. Unstable Nicoll 49 • Based on review of 152 coal miners • Recognized importance of posterior ligaments • 4 fracture types: – Stable = post ligaments intact – Unstable = post elements disrupted CT evolved MRI evolved 1930 ‘40 Morphologic Classification ‘50 Post elements important ‘60 ‘70 ‘80 ‘90 * 2000 ‘10 Anatomic Classification 2 or 3 Columns Denis ‘83 McAfee ‘83 Ferguson & Allen’84 Holdsworth’62 Kelley & Whitesides ’68 Anatomic Classification 2 Column Theory Holdsworth 62 Posterior Anterior Six types- Nicols +2 – Reviewed 1,000 patients –1 Anterior- vertebral body, ALL, PLL • Supports compressive loads –2 Posterior- facets, arch, Inter-spinous ligamentous complex • Resists tensile stresses • Stressed importance of posterior elements – If destabilized, must consider surgery 2 1 Anatomic Classification 3 Column Theory Denis 83 Posterior Middle Anterior • Based on radiographic review of 412 cases • 5 types, 20 subtypes –1 Anterior- ALL , anterior 2/3 body –2 Middle - post 1/3 body, PLL –3 Posterior- all structures posterior to PLL • Same as Holdsworth • Posterior injury-not sufficient to cause instability 3 2 1 McAfee Classification • Six types • CT based-100 patients • Middle column most important Type Wedge Compression Stable Burst Unstable Burst Flexion-Distraction Chance Translational Anterior Compression Compression Compression Compression Tension Shear Middle None Compression Compression Tension Tension Shear COLUMNS Posterior None None Comp, Lat Flex, Rot Tension Tension Shear Mechanism Forward Flexion Axial Compression Comp,Lat Flex, Rot Anterior Fulcrum Anterior Fulcrum Shear Load Sharing Classification McCormack, Spine 1994 • Review of injuries fixed posteriorly (McCormack 94) – Which failed? – Could they be prevented? – Suggests when to go anteriorly CT evolved MRI evolved 1930 ‘40 Morphologic Classification ‘50 Post elements important ‘60 2 column ‘70 ‘80 3 column, McAfee Mechanistic classifications ‘90 Load Sharing * 2000 ‘10 Load Sharing Classification (McCormack 94) • Devised method of predicting posterior failure – 1-3 points assigned to the variables below – Sum the points for a 3-9 scale • <6 points posterior only • >6 points anterior <30% 30-60% 0-1mm 1-2mm >2mm <3° 4-9° >10° >60% Comminution Fragment Displacement Kyphosis correction Mechanistic Classification AO • Review of 1445 cases (Magerl, Gertzbein et al. European Spine Journal 1994) • Based on direction of injury force • 3 types,53 injury patterns – Type A - Compression – Type B - Distraction – Type C - Rotational Increasing severity CT evolved MRI evolved 1930 ‘40 Morphologic Classification ‘50 Post elements important ‘60 2 column ‘70 ‘80 3 column, McAfee Mechanistic classifications ‘90 Load Sharing * 2000 AO ‘10 AO Mechanistic Classification Complex subdivisions to include most fractures Types Groups A1 impaction A compression A2 split A3 burst B1 post ligamentous B distraction B2 post osseous B3 anterior C1 A with rotation B rotation C2 B with rotation C3 shear Subgroups Specificastions A1.1 A1.3 A1.3 A2.1 A2.2 A2.3 A3.1 A3.2 A3.3 B1.1 B1.2 B2.1 B2.2 B2.3 B3.1 B3.2 B3.3 C1.1 C1.2 C2.1 C2.2 C2.3 C3.1 C3.2 A1.2.1, A1.2.2, A1.2.3 A3.1.1, A3.1.2, A3.1.3 A3.2.1, A3.2.2, A3.2.3 A3.3.1, A3.3.2, A3.3.3 B1.1.1, B1.1.2, B1.1.3 B1.2.1, B1.2.2, B1.2.3 B2.2.1, B2.2.2 B2.3.1, B2.3.2 B3.1.1, B3.1.2 C1.2.1, C1.2.2, C1.2.3, C1.2.4 C2.1.1, C2.1.2, C2.1.3, C2.1.4 C2.2.1, C2.2.2, C2.2.3 C2.3.1, C2.3.2, C2.3.3 Classification of thoracic and lumbar spine fractures: problems of reproducibility A study of 53 patients using CT and MRI Oner, European Spine Journal 2002 • 53 Patients AO & Denis Classifications 5 observers Cohen Test 0 = No Agreement 1.0 = Perfect Agreement Results • AO Interobserver – CT – MRI – CT/MRI 0.31 0.28 0.47 • Denis Interobserver – CT – MRI 0.60 0.52 Vaccaro, A.R. et al, Spine 2005 Spine Trauma Study Group Thoracolumbar Injury Classification and Severity Scale (TLICS) Three Part Description Injury Morphology Integrity of PLC Neurologic Status Injury Morphology •Compression: prefix-axial, lateral, flexion, postfix-burst •Distraction: prefix-extension, flexion postfix-compression, burst •Translation/Rotation: prefix-flexion postfix-compression, burst Neurologic Status •Intact •Nerve Root Injury •Cauda Equina Injury •Cord Injury-Incomplete, Complete Posterior Ligamentous Complex • Not disrupted in tension • Disrupted in tension Treatment Spine Trauma Severity Score Determined by: • Injury Morphology • Neurology • Ligamentous Integrity Vaccaro, A.R. et al., J. Spinal Disorders & Techniques 2005 Point System Injury Morphology Select one Translation / Compression fx Axial, Flexion 1 Burst - add 1 Rotation 3 Distraction injury 4 Neurology-Point System Intact 0 Nerve root Cauda equina 3 2 Cord And conus medullaris Incomplete 3 Complete 2 Posterior Soft Tissue Point System Intact 0 PLC (displaced in tension) Suspected/ Indeterminant 2 Injured 3 Evaluated by MRI, CT, Plain X-rays, Exam MODIFIERS • • • • AS/ DISH/Metabolic bone disease Nonbraceable Sternal fracture Multiple rib fractures at same or adjacent levels as fracture • Multiple trauma • Coronal plane deformity • Burns at site of anticipated incision Next Step - Direct TX Assign Points Conservative Surgery Treatment • Injuries with 3 points or less = non • • operative Injuries with 4 points=Nonop vs Op Injuries with 5 points or more = surgery Examples Flexion Compression Fx •Flexion compression (morphology) - 1 •Intact (neurology) - 0 •PLC (ligament) no injury - 0 Total 1 points- Non Op Compression Burst Fracture •Flexion compression burst - 2 •Intact ( neurology) - 0 •PLC (ligament) no injury (0) Total 2 points-Non Op Compression Burst-Complete Neuro Injury •Axial compression burst with distraction posterior ligamentous complex -4 •Complete (neurology) - 2 •PLC (ligament) injury - 3 Total 9 points-Surgery Compression Burst-Complete injury • Axial compression burst-2 • Complete (neurology)-2 • PLC (ligament) Intact-0 Points 4-Non Op vs Op Translational/Rotation Injury •Distraction, Translation/rotational, compression injury - 4 •Complete (neurology) – 2 •PLC injury - 3 Total 9 pointsSurgery Journal of Spinal Disorders & Techniques, 2006 • Surgical Decision making based off tenets of classification system – Injury morphology – Neurological status – PLC integrity/injury stability Spine, 2006 • Reliability/treatment validity at single institution – Treatment validity exceptional- 96.4% – Moderate agreement for PLC (66%) and mechanism (60%) Conflict: Mechanism vs Morphology The Journal of Spinal Disorders and Techniques Identifying objective findings on imaging studies and clinical examination instead of guessing injury mechanisms provides more valid understanding of injury classification J. Neurosurgery Spine, 2006 • Problems – Inter-rater agreement on sub-scores was: • Lowest for mechanisms followed by PLC • Highest for neurological status • Substantial for the management recommendation The Spine Journal, 2006 Status PLC Most reliable indicators: • Vertebral body translation on plain radiographs • Disrupted PLC components on T1 sagittal MRI • Focal kyphosis in absence of vertebral body injury Assessment of Injury to the PLC in the Setting of on Normal Plain Radiographs Lee, J., Vaccaro, A.R. et al. J Orthopaedic Trauma 2006 Validation Study J. Orthopaedic Research Submitted 2006 STATUS PLC - Disrupted PLC components i.e. ISL, SSL, LF; black stripe on T1 sagittal MRI , most important factor - Diastasis of the facet joints on CT - Fat suppressed T2 sagittal MRI Lim, Coluna/Columna Journal, 2006 • IMPACT OF EXPERIENCE (attending surgeons, fellows, residents, and non-surgeon health care professionals). • Most reliable among spine fellows, followed by attending spine surgeons. Spine, 2007 Dramatic Reliability Increase in Latest Evaluation: Inter-rater Reliability as Assessed by Cohen's Kappa TJU TLISS June STSG TLISS July TJU TLISS Dec 0.50 kappa • IMPACT OF TRAINING • Management component: reliability rose from κ = 0.46 (r=0.47) on first assessment to κ = 0.72 (r=0.91) on the 2nd assessment. 0.75 0.25 0.00 Mech PLC Total Management Rothman/TJU Reliability Study, Fall 2005 J Spinal Disorders, 2006 • DIFFERENCES BETWEEN SPECIALTIES – Inter-rater reliability: “injury mechanism” higher in neurosurgeons – Assessment of PLC, neurological status- higher in orthopaedic surgeons – Reliability total score/management recommendations similar – Overall, differences subtle World J Emerg Surg, 2007 • DIFFERENCES IN NATIONALITIES • Inter-rater reliability for mechanism higher among non-US surgeons • Reliability for PLC, neurological status, management higher among US surgeons Management of Thoracic and Lumbar Injuries CONTROVERSIAL!!!! Non-Operative Treatment of Thoracic Spine Injuries Brace or Cast Treatment – Compression Fractures – Stable Burst Fractures – Pure Bony Flexion-Distraction Injury Folman and Gepstein, J Orthop Trauma, 2003 85 pts reviewed to determine late outcome of nonop management Pain intensity correlated with angle of kyphosis Chronic pain predominant in 69.4% 25% of subjects had changed jobs (most full to part) 48% of subjects filed lawsuits concerning injury But not w/magnitude of anterior column deformity Bed rest alone adequately manages traumatic, uncomplicated thoracolumbar wedge fractures Agus, Eur J Spine, 2005 Evaluated 29 pts with 2- or 3-column-injured thoracolumbar burst fractures No correlation was found between radiological &functional parameters Vertebral column deformity that occurred after the injury was stable in 2-column; progressive in 3column Significant remodeling of canal encroachment (CE) proportional to initial amount of CE but not related to age & radiology Koller, Eur Spine J, 2008 Evaluated 21 pts; 9.5 yr f/u 62% showing good or excellent outcome 38% showing moderate or poor outcome Significant effects on clinical outcome: Load-sharing classification, posttraumatic kyphosis & overall lumbopelvic lordosis Surgical reconstruction appropriate treatment in more severe fractures Surgical Management of Thoracolumbar Injuries • • • • • Unstable burst fractures Purely ligamentous Facet dislocations Translational injuries Neurologic deficit Dai, J Trauma, 2004 147 pts w/acute thoracolumbar fractures: 1988 to 1997 Min. 3yr f/u; 4 pts died during hospital stay Delayed diagnosis in 28 pts (19%) Differences b/w surgical & non: in pulmonary complications & length of hospital stay in non-op pts. Surgical pts had highly significantly less pain Radiographic studies should be performed Choice of treatment in pts with multiple injuries is not different from that in pts with no asscd injuries Thomas, J Neurosurg Spine, 2006 Evaluated scientific literature on operative & non-op treatments Lack of evidence demonstrating superiority of one approach over the other No evidence linking posttraumatic kyphosis to clinical outcomes Strong need for improved clinical research methodology to be applied to this patient population Dai, Spine, 2008 Reviewed 37 pts Accuracy of plain radiographs improved w/experience of observers Impact of disagreement on treatment plan was significant Plain radiography alone is not adequate Acosta, J Neurosurg Spine, 2008 Biomechanical comparison of 3 fixation techniques for unstable thoracolumbar fractures. Induced at L1: 1) Short-segment anterolateral fixation 2) Circumferential fixation 3) Extended anterolateral fixation Extended anterolateral fixation is biomechanically comparable to circumferential fusion Extension of anterior instrumentation & fusion 1level above and below the unstable segment can result in near equivalent stability to a 2-stage circumferential procedure Disch, Spine, 2008 Angular stable plate system showed higher primary and secondary stability In specimens with lower BMD, the use of angular stable systems substantially increased stability Whang, J Am Acad Orthop Surg, 2008 Difficult to establish the ideal surgical approach Anterior decompression assocd w/ recovery of motor strength & bowel/bladder fxn; pain & improve neuro status Stand-alone anterior constructs: complications & likely to have revision More definite evidence required to determine best surgical strategy Conclusions on Treatment • Surgically treating incomplete neuro deficits potentiates improvement and rehabilitation • Complete neuro deficits may benefit from operative treatment to allow mobilization • Little chance of developing neuro deficits with nonoperative treatment Surgery: Anterior versus Posterior • Anterior – More predictable decompression – Saves levels – Questionable improved recovery of neuro function – Gertzbein,1992 – may be indicated in bladder dysfunction – McAfee, 1985 – neuro recovery in 70 patients • Posterior – Less morbidity – Failures with short – segment constructs – Usually requires more levels – Less blood loss – Transpedicular anterior column bone grafting may protect posterior construct Thank You Bibliography Meyer PR Jr, Sullivan DE. Injuries to the spine. Emerg Med Clin North Am. 1984 May;2(2):313-29. Mackersie RC, Shackford SR, Garfin SR, Hoyt DB. Major skeletal injuries in the obtunded blunt trauma patient: a case for routine radiologic survey J Trauma. 1988 Oct;28(10):1450-4. Bohler L. Die techniek de knochenbruchbehandlung imgrieden und im kriege. Verlag von Wilhelm Maudrich 1930 (in German) Bohler L. Mechanisms of fracture and dislocation of the spine in the treatment of fractures. 5 th English ed. Fractures and dislocation of the spine. Bohler L, editor. Vol. 1. Grune and Straton, Inc: New York; 1956. p. 300-29. Watson-Jones R. The results of postural reduction of the fractures of the spine. J Bone Joint Surg Am 20 (3): 567. Nicoll EA. Fracture-dislocation of the dorsolumbar spine. J Bone Joint Surg Br. 1949;31:376-394. Holdsworth F. W. The Spinal Cord. Basic Aspects and Surgical Considerations. J Bone Joint Surg Br 1962 44-B: 968-969. Kelly and T.E. Whitesides, Jr., Treatment of lumbodorsal fracture-dislocations. Ann Surg 167 (1968), pp. 705–709. Denis F. The three column spine and its significance in the classification of acute thoracolumbar spinal injuries. Spine. 1983 Nov-Dec;8(8):817-31. McAfee PC, Yuan HA, Fredrickson BE, Lubicky JP. The value of computed tomography in thoracolumbar fractures. An analysis of one hundred consecutive cases and a new classification. J Bone Joint Surg Am. 1983 Apr;65(4):461-73. Ferguson RL, Allen BL Jr. A mechanistic classification of thoracolumbar spine fractures. Clin Orthop Relat Res. 1984 Oct;(189):77-88. McCormack T, Karaikovic E, Gaines RW. The load sharing classification of spine fractures. Spine. 1994 Aug 1;19(15):1741-4. Magerl F, Aebi M, Gertzbein SD, Harms J, Nazarian S. A comprehensive classification of thoracic and lumbar injuries. Eur Spine J. 1994;3(4):184-201. Öner, FC, Ramos, LM, Simmermacher, RK, Kingma, PT, Diekerhof, CH, Dhert, WJ et al. (2002) "Classification of thoracic and lumbar spine fractures: problems of reproducibility: a study of 53 patients using CT and MRI" Eur Spine J 11: 235-45 Vaccaro, AR, Zeiller, SC, Hulbert, RJ, Anderson, PA, Harris, M, Hedlund, R et al. (2005) "The thoracolumbar injury severity score: a proposed treatment algorithm" J Spinal Disord Tech 18: 209-15 Vaccaro AR, Lim MR, Hurlbert RJ, Lehman RA Jr, Harrop J, Fisher DC, Dvorak M, Anderson DG, Zeiller SC, Lee JY, Fehlings MG, Oner FC; Spine Trauma Study Group. Surgical decision making for unstable thoracolumbar spine injuries: results of a consensus panel review by the Spine Trauma Study Group. J Spinal Disord Tech. 2006 Feb;19(1):1-10. Vaccaro AR, Baron EM, Sanfilippo J, Jacoby S, Steuve J, Grossman E, DiPaola M, Ranier P, Austin L, Ropiak R, Ciminello M, Okafor C, Eichenbaum M, Rapuri V, Smith E, Orozco F, Ugolini P, Fletcher M, Minnich J, Goldberg G, Wilsey J, Lee JY, Lim MR, Burns A, Marino R, DiPaola C, Zeiller L, Zeiler SC, Harrop J, Anderson DG, Albert TJ, Hilibrand AS. Reliability of a novel classification system for thoracolumbar injuries: the Thoracolumbar Injury Severity Score. Spine. 2006 May 15;31(11 Suppl):S62-9; discussion S104. Anand N MD, Vaccaro AR MD, Lim MR MD, Lee JY MD, Arnold P MD, Harrop JS MD, Ratlif J MD, Rampersaud R MD, Bono CM MD. Evolution of Thoracolumbar Trauma Classification Systems: Assessing the Conflict Between Mechanism and Morphology of Injury. Topics in Spinal Cord Injury Rehabilitation Volume 12, Number 1/Summer 2006 - Acute SCI Management: Basic Science and Nonoperative Care: 70-78. Schweitzer KM Jr, Vaccaro AR, Lee JY, Grauer JN; Spine Trauma Study Group. Confusion regarding mechanisms of injury in the setting of thoracolumbar spinal trauma: a survey of The Spine Trauma Study Group (STSG). J Spinal Disord Tech. 2006 Oct;19(7):528-30. Harrop JS, Vaccaro AR, Hurlbert RJ, Wilsey JT, Baron EM, Shaffrey CI, Fisher CG, Dvorak MF, Oner FC, Wood KB, Anand N, Anderson DG, Lim MR, Lee JY, Bono CM, Arnold PM, Rampersaud YR, Fehlings MG; Spine Trauma Study Group. Intrarater and interrater reliability and validity in the assessment of the mechanism of injury and integrity of the posterior ligamentous complex: a novel injury severity scoring system for thoracolumbar injuries. Invited submission from the Joint Section Meeting On Disorders of the Spine and Peripheral Nerves, March 2005. J Neurosurg Spine. 2006 Feb;4(2):118-22. Vaccaro AR, Lee JY, Schweitzer KM Jr, Lim MR, Baron EM, Oner FC, Hulbert RJ, Hedlund R, Fehlings MG, Arnold P, Harrop J, Bono CM, Anderson PA, Anderson DG, Harris MB, Spine Trauma Study Group . Assessment of injury to the posterior ligamentous complex in thoracolumbar spine trauma. Spine J. 2006 Sep-Oct;6(5):524-8. Epub 2006 Jul 11. Lee JY; Vaccaro AR; Schweitzer KM; Lim MR; Baron EM; Rampersaud R; Oner F C; Hulbert R J; Hedlund R; Fehlings MG; Arnold P; Harrop J; Bono CM; Anderson PA; Patel A; Anderson D G; Harris MB Assessment of injury to the thoracolumbar posterior ligamentous complex in the setting of normal-appearing plain radiography. The spine journal : official journal of the North American Spine Society 2007;7(4):422-7. Lim M, Vaccaro AR, Lee J, Jacoby S, SanFilippo J, Oner FC, Hulbert J, Fehlings M, Arnold P, Harrop J, Bono C, Anderson P, Anderson DG, Baron E. The Thoracolumbar Injury Severity Scale and Score (TLISS): Interphysician and inter-disciplinary validation of a new paradigm for the treatment of thoracolumbar spine trauma, Coluna/Columna (Brazil), 5(3):157-64, 2006. Patel AA, Vaccaro AR, Albert TJ, Hilibrand AS, Harrop JS, Anderson DG, Sharan A, Whang PG, Poelstra KA, Arnold P, Dimar J, Madrazo I, Hegde S. The adoption of a new classification system: time-dependent variation in interobserver reliability of the thoracolumbar injury severity score classification system. Spine. 2007 Feb 1;32(3):E105-10. Raja Rampersaud Y, Fisher C, Wilsey J, Arnold P, Anand N, Bono CM, Dailey AT, Dvorak M, Fehlings MG, Harrop JS, Oner FC, Vaccaro AR. Agreement between orthopedic surgeons and neurosurgeons regarding a new algorithm for the treatment of thoracolumbar injuries: a multicenter reliability study.J Spinal Disord Tech. 2006 Oct;19(7):477-82. Ratliff J, Anand N, Vaccaro AR, Lim MR, Lee JY, Arnold P, Harrop JS, Rampersaud R, Bono CM, Gahr RH; Trauma Study Group Spine. Regional variability in use of a novel assessment of thoracolumbar spine fractures: United States versus international surgeons. World J Emerg Surg. 2007 Sep 7;2:24. Bracken MB, Shepard MJ, Collins WF, Holford TR, Young W, Baskin DS, Eisenberg HM, Flamm E, Leo-Summers L, Maroon J, et al. A randomized, controlled trial of methylprednisolone or naloxone in the treatment of acute spinal-cord injury. Results of the Second National Acute Spinal Cord Injury Study. N Engl J Med. 1990 May 17;322(20):1405-11. Folman Y, Gepstein R. Late outcome of nonoperative management of thoracolumbar vertebral wedge fractures. J Orthop Trauma. 2003 Mar;17(3):190-2. Ağuş H, Kayali C, Arslantaş M. Nonoperative treatment of burst-type thoracolumbar vertebra fractures: clinical and radiological results of 29 patients. Eur Spine J. 2005 Aug;14(6):536-40. Epub 2004 May 28. Koller H, Acosta F, Hempfing A, Rohrmüller D, Tauber M, Lederer S, Resch H, Zenner J, Klampfer H, Schwaiger R, Bogner R, Hitzl W. Long-term investigation of nonsurgical treatment for thoracolumbar and lumbar burst fractures: an outcome analysis in sight of spinopelvic balance. Eur Spine J. 2008 Aug;17(8):1073-95. Epub 2008 Jun 25. Dai LY, Yao WF, Cui YM, Zhou Q. Thoracolumbar fractures in patients with multiple injuries: diagnosis and treatment-a review of 147 cases. J Trauma. 2004 Feb;56(2):348-55. Thomas KC, Bailey CS, Dvorak MF, Kwon B, Fisher C. Comparison of operative and nonoperative treatment for thoracolumbar burst fractures in patients without neurological deficit: a systematic review. J Neurosurg Spine. 2006 May;4(5):351-8. Dai LY, Wang XY, Jiang LS, Jiang SD, Xu HZ. Plain radiography versus computed tomography scans in the diagnosis and management of thoracolumbar burst fractures. Spine. 2008 Jul 15;33(16):E548-52. Acosta FL Jr, Buckley JM, Xu Z, Lotz JC, Ames CP. Biomechanical comparison of three fixation techniques for unstable thoracolumbar burst fractures. Laboratory investigation. J Neurosurg Spine. 2008 Apr;8(4):341-6. Disch AC, Knop C, Schaser KD, Blauth M, Schmoelz W. Angular stable anterior plating following thoracolumbar corpectomy reveals superior segmental stability compared to conventional polyaxial plate fixation. Spine. 2008 Jun 1;33(13):1429-37. Whang PG, Vaccaro AR. Thoracolumbar fractures: anterior decompression and interbody fusion. J Am Acad Orthop Surg. 2008 Jul;16(7):424-31. Gertzbein SD, Crowe PJ, Fazl M, Schwartz M, Rowed D. Canal clearance in burst fractures using the AO internal fixator. Spine. 1992 May;17(5):558-60. McAfee PC, Bohlman HH. Complications following Harrington instrumentation for fractures of the thoracolumbar spine. J Bone Joint Surg Am. 1985 Jun;67(5):672-86. Thank you If you would like to volunteer as an author for the Resident Slide Project or recommend updates to any of the following slides, please send an e-mail to ota@aaos.org E-mail OTA about Questions/Comments Return to Spine Index