Knowledge · Spinal Trauma
Traumatic Spinal Injuries
A fall from height, a traffic accident, or a severe sports injury can cause significant spinal damage. The key to treatment is rapid identification of the complete injury pattern: How stable is the spine? Are the spinal cord or nerves affected? Which management allows a safe return to everyday life?
Which injuries are meant here
High-energy describes the considerable force involved in the accident. Vertebral bodies may fracture, and intervertebral discs, joints, and ligaments may be injured. A previously healthy spine is not a prerequisite: people with osteoporosis or an already fused spine can also sustain a high-energy trauma.
This page focuses on traumatic injuries of the thoracic and lumbar spine in adults, with the thoracolumbar junction most commonly affected. Cervical spine injuries have their own classifications and treatment concepts; the A3 and A4 burst fractures described here refer to the thoracolumbar spine.
Osteoporotic vertebral fractures after minor loading are described in a separate article. A particular situation arises in injuries to a spine ankylosed by ankylosing spondylitis or DISH: even a relatively minor accident can cause a highly unstable fracture there. Such injuries also require careful assessment and often surgical stabilisation.
Schaefer RO et al. Brain Spine. 2024. PMID 38681176
How a vertebral fracture is classified
The AO Spine classification describes the injury pattern. For the thoracic and lumbar spine it distinguishes three main groups. Neurological deficits and special circumstances are also taken into account. The classification facilitates communication but does not replace individual treatment decisions.
- Type A – Compression injury: The vertebral body is compressed. A1 and A2 do not affect the posterior wall. In A3, the posterior wall and one endplate are involved; in A4, both endplates are affected. These burst fractures can displace bony fragments into the spinal canal.
- Type B – Tension band injury: The structures that protect the spine against distraction are disrupted. This can occur through bone alone, as in B1, or involve ligaments and other structures, as in B2 and B3. A B-injury can occur together with a burst fracture.
- Type C – Displacement injury: Spinal segments are displaced or dislocated relative to each other. These injuries are highly unstable and almost always require surgical stabilisation.
AO Spine Thoracolumbar Injury Classification System – overview
Why identifying a B-injury matters so much
When a burst fracture is present, assessment must not stop at the fractured vertebral body. It is equally important to determine whether the posterior tension band is injured. If such an associated injury is missed, the stability of the spine can be overestimated and an unsuitable treatment selected.
I therefore look specifically on CT for indirect and direct signs — for example, widened interspinous distances, abnormal facet joint alignment, and corresponding bony injury lines. If ligamentous integrity remains unclear and this question influences treatment, I add an MRI. Normal strength and sensation alone do not prove mechanical stability.
Canseco JA et al. Eur Spine J. 2026. PMID 41854908 · Schnake KJ et al. Global Spine J. 2024. PMID 38324596
Initial diagnostics
In polytrauma patients, airway, circulation, and other life-threatening injuries take priority. Assessment of the spine is part of this systematic emergency management. The neurological findings are documented and repeated over time: motor strength, sensation, and where applicable signs of spinal cord or cauda equina injury.
CT is the gold standard for initial imaging in high-energy spinal injuries. It shows fractures, malalignment, and bony signs of instability rapidly and in detail. In severe trauma, attention is also paid to additional, spatially separate spinal injuries and associated injuries. Conventional radiographs or whole-body survey images such as Lodox are insufficient to reliably exclude relevant injuries.
MRI answers supplementary questions. It is particularly helpful for neurological deficits, suspected spinal cord, disc, or ligament injuries, and unclear tension band integrity. It is not an automatic add-on after every CT. An abnormal ligament signal is interpreted in the context of the injury pattern.
In our study of the cervical spine, supplementary MRI changed the treatment strategy in 25 percent of a selected group of 56 patients with an already CT-identified injury. It was particularly relevant in neurological symptoms. This figure cannot be extrapolated to all trauma patients or to all spinal regions.
Rutsch N et al. Injury. 2023. PMID 37164902 · Häckel S et al. BMC Emerg Med. 2021. PMID 33663394 · Rutsch N et al. Scand J Trauma Resusc Emerg Med. 2024. PMID 39039608
The individual treatment decision
Stable management aims to reduce pain, prevent further damage, and restore movement. Beyond fracture type, what matters is tension band and disc integrity, malalignment, neurological findings, ability to mobilise, and associated injuries. Pre-existing conditions, occupational demands, and sporting goals are equally important.
I summarise these findings in plain language and explain the expected benefits and limitations of both treatment pathways. A burst fracture of type A3 or A4 does not by itself mean that surgery is necessary — nor that conservative treatment is necessarily safe.
What surgery can achieve in A3 and A4 injuries
In suitable A3 and A4 injuries, surgical stabilisation can support early recovery. Particularly when pain makes standing and walking difficult, a rapidly weight-bearing stabilisation is an important treatment goal. It can often be achieved through small skin incisions.
International comparative data show a differentiated picture: in the main functional study, similar levels of impairment were found in both groups at one year; an additional endpoint showed a trend towards earlier low daily activity impairment after surgery. In the accompanying cost-effectiveness analysis, analgesic use and time off work were lower in the operated group. This argues for also considering the path of recovery. However, because treatment allocation was not random, the data do not demonstrate general superiority for every A3 or A4 fracture.
Dvorak MF et al. Global Spine J. 2026. PMID 40605521 · Dandurand C et al. Spine J. 2025. PMID 39892710
When conservative treatment is appropriate
For sufficiently stable injuries without neurological deficits, non-operative management is frequently possible. This includes adapted analgesia, early guided mobilisation, and regular clinical and imaging follow-up. Prolonged bed rest is avoided wherever possible.
Selected burst fractures are also candidates for conservative management. Prerequisites include in particular the absence of a relevant additional tension band injury, acceptable alignment, and the ability to mobilise safely. Progressive malalignment, persistent uncontrollable pain, or inability to mobilise may justify a switch to surgery. New neurological symptoms require immediate reassessment.
Wood KB et al. J Bone Joint Surg Am. 2015. PMID 25568388 · Siebenga J et al. Spine. 2006. PMID 17139218
A brace is not automatically required. A randomised study showed comparable functional outcomes with and without brace in selected, assessed-as-stable burst fractures without neurological deficits. This cannot be generalised to unstable injuries or all A4 fractures. Whether an orthosis is helpful in a given situation is decided individually. A prescribed brace should therefore not be discontinued without medical advice.
Bailey CS et al. Spine J. 2014. PMID 24184649
When surgery is particularly important
Surgery is indicated particularly for relevant instability — usually B- and C-injuries — for persistent nerve compression with neurological deficits, and for significant malalignment. Unsuccessful conservative mobilisation or the overall situation of a multiply injured patient may also support this decision.
The urgency depends on the neurological findings, injury pattern, and general condition. In acute spinal cord injury, current AO Spine/Praxis clinical practice guidelines recommend early surgery within 24 hours as a treatment option, where medically feasible. Progressive deficits require immediate assessment. This time frame does not apply universally to every vertebral fracture without neurological involvement.
Minimally invasive stabilisation is often possible
In percutaneous stabilisation, screws are placed through small skin incisions and connected by rods. Placement is image-guided — for example under fluoroscopy. The back muscles require less extensive exposure. This allows stable fixation with reduced access trauma in suitable injuries.
In appropriate cases, the instrumentation can act like an internal splint without permanently fusing every bridged spinal segment. After confirmed healing, it is individually assessed whether implant removal is worthwhile. The fracture, the intervertebral discs, and the actual fusion achieved are decisive.
The length of stabilisation and the approach are determined by the stability required. Complex malalignment, necessary direct nerve decompression, or severely damaged anterior column may require additional or open steps. The smallest meaningful intervention is the one that reliably addresses the injury.
Dandurand C et al. J Clin Orthop Trauma. 2026. PMID 41798250
Vertebral body reconstruction
In cases of severe destruction, additional reconstruction of the anterior column may be necessary. A vertebral body replacement bridges the partially or completely removed vertebral body. Combined with posterior stabilisation, this creates a 360-degree construct. It is not required for every burst fracture.
Distinct from this is augmentation and realignment of a preserved vertebral body — for example with a vertebral body stent and filling material. This technique is an option for selected fractures and does not replace necessary management of a tension band injury. Our stent series included traumatic, osteoporotic, and tumour-related fractures; it does not establish general superiority in high-energy injuries.
Deml MC et al. Eur Spine J. 2020. PMID 32468192 · Oswald KAC et al. Eur Spine J. 2023. PMID 36715755
Risks to consider
Surgical risks include infection, haemorrhage, injury to nerves or dura mater, implant malposition or failure, non-union, and the need for revision surgery. Conservative treatment also carries potential problems, including inadequate mobilisation, progressive malalignment, and persistent pain. Individual risk depends strongly on injury, co-morbidities, and the extent of treatment.
After both treatment pathways, loading is increased gradually. In patients with restricted mobility, measures to prevent thrombosis and other consequences of immobility are planned individually.
Camino Willhuber G et al. Global Spine J. 2026. PMID 41456154
Healing and return to everyday life and sport
The initial bone healing phase typically takes six to twelve weeks. Higher loading capacity may take several months; after complex injuries or fusion, longer. These time frames are reference values, not an automatic clearance. What matters are symptoms, function, and the imaging course.
For return to work, I distinguish between predominantly sedentary work and physical labour. In sport, everyday activities and basic training are built up first, then strength, sports-specific movements, and lastly training or competition with high fall or contact risk. Prerequisites are sufficiently healed and stable injury, an unremarkable or stable neurological examination, and adequate function for the specific demand.
Our follow-up of 28 young patients after combined stabilisation of a burst fracture showed that 83 percent returned to their previous activity level within twelve months. This is encouraging, but not an individual prognosis and not evidence that every competitive athlete returns to their prior competitive level. In the care of competitive athletes, I coordinate the loading progression with the specific sport and injury.
Aregger FC et al. Brain Spine. 2024. PMID 38510642
New weakness, sensory disturbances in the perineal area, bladder or bowel dysfunction, or marked worsening of pain require prompt reassessment. After surgery, this also applies to fever or wound abnormalities. Persistent symptoms can be related not only to bone healing but also to injured discs, muscles, or nerves.
What back protectors can achieve
Back protectors must not create a false sense of security. Our retrospective winter sports study could not demonstrate clear protection against spinal injuries in the injured patients examined. Overall injury severity was also not significantly reduced after statistical adjustment for other factors. Because only patients at a trauma centre were studied, no definitive conclusion about benefit in all winter sports participants can be drawn. A protector does not replace appropriate speed, technique, and risk assessment.
Tinner C et al. Eur J Trauma Emerg Surg. 2025. PMID 41148341
My approach in trauma care
My treatment pathway begins with rapid clinical and neurological assessment and CT as the gold standard for initial imaging. In thoracolumbar burst fractures, I pay particular attention to associated B-injuries. MRI supplements the workup where open questions about ligaments, discs, or nerves would influence the decision.
I then summarise the findings and discuss which pathway offers the best prospect of safe and rapid recovery in your situation. If surgery is appropriate, I aim for stable, minimally invasive fixation. Conservative treatment is guided by clear loading instructions and follow-up visits.
Spinal trauma is one of my central research and teaching areas. I contribute to classification and treatment decisions as a member of the AO Spine Knowledge Forum Trauma & Infection and serve as Chair of the AO Spine Trauma Curriculum Course. As a member of the Trauma Curriculum Task Force I also contribute to the development of international training programmes. This work informs my clinical assessment and counselling.
Research behind treatment decisions
This article draws on my own work together with independent comparative studies. What matters is which question a study actually answers. Similar outcomes at one year do not preclude differences in early recovery. Conversely, earlier mobilisation does not prove a lasting advantage in all areas of life.
Surgery versus conservative treatment
The international A3/A4 cohort complements small randomised studies with varying results. Wood found advantages of conservative treatment after 16 to 22 years in selected stable fractures; Siebenga reported advantages of surgery. Different patient selection and older surgical techniques limit generalisability.
Dvorak MF et al. Global Spine J. 2026. PMID 40605521 · Dandurand C et al. Spine J. 2025. PMID 39892710 · Wood KB et al. J Bone Joint Surg Am. 2015. PMID 25568388 · Siebenga J et al. Spine. 2006. PMID 17139218
Identifying B-injuries
A recent analysis by Canseco and colleagues found less favourable outcomes in conservatively treated burst fractures with additional B1/B2 injury. The conservative subgroup comprised only six patients, however. The study underlines the importance of complete injury diagnosis; it does not provide a precise universal threshold for surgery.
Canseco JA et al. Eur Spine J. 2026. PMID 41854908
Own research
Our epidemiological study recorded 8,307 fractures in 4,772 patients over ten years. Further work addresses diagnostic accuracy, expert decision-making, minimally invasive techniques, and sport after spinal injury. Such studies inform counselling but cannot anticipate decisions for the individual patient.
Bigdon SF et al. J Orthop Surg Res. 2022. PMID 35568925 · Schnake KJ et al. Global Spine J. 2024. PMID 38324596
Consultation after acute care
If the acute injury has already been assessed and treated, I can support you with questions about next steps, a recommended operation, or return to everyday life and sport. For a second opinion, original CT images, MRI if applicable, the treatment report, and previous follow-up visits are particularly helpful.
Written and medically reviewed by Sebastian Bigdon, MD · Last updated: 9 September 2026 · The sources used are cited with PubMed references in the section «What does the research say?».
Frequently Asked Questions
Does an A3 or A4 fracture require surgery?
Does a fragment in the spinal canal mean impending paralysis?
Can surgery be performed through small incisions?
Do I need a brace?
When can I return to sport?
Do screws and rods need to be removed?
I take the time to review your imaging and provide a clear, written assessment – including as a second opinion.