Spinal Fractures

A spinal fracture is a break in one or more of the bones — vertebrae — that make up the spinal column. It can happen in an instant, such as during a fall or car accident, or develop slowly and silently over years as bones weaken with age or disease.

Because the spine houses and protects the spinal cord and the nerve roots that control movement and sensation throughout the body, a fracture here carries a different order of significance than a break in an arm or leg.

Understanding the Spine and Vertebral Bones

The spine is made up of 33 vertebrae, arranged into the cervical (neck), thoracic (mid-back), lumbar (lower back), sacral and coccygeal regions. Each vertebra is a roughly cylindrical block of bone at the front, with bony arches at the back that form a protective canal for the spinal cord. Ligaments, muscles and small joints between adjacent vertebrae work together to keep the spine stable while still allowing movement.

A vertebra can withstand considerable everyday load — supporting body weight, absorbing the impact of walking and running, and allowing bending and twisting. A fracture occurs when a force exceeds what the bone can withstand, either because the force is unusually large (as in a fall or collision) or because the bone itself has weakened and can no longer tolerate even normal, everyday loads.

What Are Spinal Fractures?

A spinal fracture is a break in any of the bones of the spinal column. It most commonly affects the mid and lower spine, where the transition between the relatively rigid thoracic spine and the more mobile lumbar spine concentrates mechanical stress. Depending on the force involved and the fracture pattern, a spinal fracture can range from a minor crack that heals with rest, to a severely unstable injury that threatens the spinal cord and nerve roots.

Traumatic spinal fractures are usually caused by a fall, sports injury or motor vehicle accident, where the spine is subjected to a sudden load well beyond what it would normally bear. Pathological or osteoporotic fractures, in contrast, occur when the bone itself has weakened — most often due to osteoporosis — to the point that even a minor movement, cough, or low-impact fall can cause a vertebra to collapse.

A compression fracture — the most common type — occurs when a force flexes the spine and compresses the front of the vertebral body, causing it to lose height and change from its normal rectangular shape into a wedge or trapezoid shape. In more severe injuries, bone fragments can be pushed backward into the spinal canal, risking damage to the spinal cord or nerve roots.

Types of Spinal Fractures

Spinal fractures are classified by the pattern of bone failure, which in turn determines how stable the spine remains and what treatment is likely to be needed.

Compression Fracture: The front of the vertebral body collapses under load, often changing from a rectangular shape to a wedge shape. May happen suddenly from trauma or gradually from osteoporosis.
Burst Fracture: A sudden, high-energy force compresses the vertebra from multiple directions, causing it to shatter and fragments to spread outward, sometimes into the spinal canal.
Chance Fracture: The vertebra fails in tension rather than compression — the back and middle of the bone are pulled apart, typically from a sudden forward-bending force such as a seatbelt injury.
Fracture-Dislocation: A fracture combined with displacement of the vertebra from its normal alignment, disrupting the ligaments and joints that hold the spine together.

Causes of Spinal Fractures

Traumatic Causes

A common cause of spinal fracture, particularly in older adults with reduced bone strength or reflexes, where even a fall from standing height can result in a fracture
High-energy collisions can subject the spine to forces far beyond what it is designed to withstand, often resulting in more complex fracture patterns
Contact sports, cycling, and activities involving heights or high speed carry a higher risk of significant spinal trauma
Sudden forceful bending, twisting, or direct impact to the back or neck during an accident or physical assault

Non-Traumatic (Pathological) Causes

Osteoporosis: A condition that causes bones to become porous and fragile, is the leading cause of spinal fractures that occur without significant trauma, particularly in the thoracic and lumbar spine
Malignancy or bone metastases: Cancer that spreads to the spine, or arises there, can weaken vertebral bone and lead to fracture with minimal or no trauma
Other bone-weakening conditions: Bone infections and certain metabolic bone disorders can also weaken vertebrae over time, increasing fracture risk

Risk Factors for Spinal Fractures

Age: Bone density and bone strength naturally decline with age, and the risk of osteoporotic spinal fractures rises significantly after menopause and in later adulthood
Sex and hormonal status: Postmenopausal women are at particularly high risk of osteoporosis-related spinal fractures due to declining oestrogen levels, which accelerate bone loss
Osteoporosis or low bone density: Reduced bone mineral density is the single strongest risk factor for a fracture occurring with little or no trauma
Long-term steroid use: Prolonged use of corticosteroid medications can weaken bone over time and increase fracture risk
Underlying cancer: Cancers involving the spine, either primary or metastatic, can compromise the structural integrity of vertebrae
High-risk activity or occupation: Contact sports, high-speed activities, and jobs involving heights or heavy manual labour increase exposure to high-impact forces
Smoking and poor nutrition: Toxins from smoking impair bone health and slow healing, while inadequate calcium and vitamin D intake weakens bone over time
Falls risk: Impaired balance, muscle weakness, poor vision or certain medications increase the likelihood of falls, a leading trigger for spinal fractures in older adults

Symptoms of Spinal Fracture

Symptoms of a spinal fracture depend heavily on the type, severity, and whether the spinal cord or nerve roots are affected.

Osteoporotic and Gradual Compression Fractures

Many compression fractures related to osteoporosis develop slowly and are not initially noticed, sometimes only identified incidentally on imaging performed for another reason. When symptoms do occur, they may include:

Back pain that develops gradually or after a relatively minor strain
Difficulty bending, twisting or changing position
Gradual loss of height over time
A forward-curving of the upper back (kyphosis), sometimes referred to as a dowager's hump, as repeated fractures accumulate

Traumatic Fractures

Fractures caused by a fall, accident or sudden injury tend to present more acutely, and the pattern of symptoms can indicate whether the spinal cord or nerves are involved:

Sudden, often severe neck or back pain at the time of injury
Muscle spasm around the injured area
Numbness, tingling, or a sensation of pins and needles radiating from the affected area
Weakness in the arms or legs
Changes in bowel or bladder control
In severe cases involving significant spinal cord injury, partial or complete paralysis below the level of the fracture

How Spinal Fractures Affect the Body

The impact of a spinal fracture extends well beyond the initial injury, particularly when fractures are left untreated or when several accumulate over time, as is common with osteoporosis.

Ongoing discomfort at the fracture site is common, particularly with unstable or multiple fractures, and can persist long after the bone has healed
Repeated compression fractures cause progressive forward curvature of the spine, altering posture and, in some cases, appearance and self-confidence
Each vertebral fracture can result in permanent height loss, which accumulates with subsequent fractures
Significant spinal curvature in the thoracic spine can reduce chest expansion, affecting breathing capacity in more advanced cases
Fractures that compress the spinal cord or nerve roots can cause lasting weakness, sensory changes, or, in severe cases, paralysis
One vertebral fracture changes the mechanics of the spine, increasing the load on neighbouring vertebrae and raising the risk of further fractures — sometimes called a fracture cascade
Chronic pain, reduced mobility and altered posture can affect independence, mood and overall quality of life, particularly in older adults

How Are Spinal Fractures Diagnosed?

Diagnosis begins with a history of the injury or symptoms and a careful physical and neurological examination, followed by imaging to confirm the fracture and assess its stability.

Clinical & Neurological Examination: Assessment of the site and pattern of pain, spinal alignment, and a check of muscle strength, reflexes and sensation to identify any nerve or spinal cord involvement.
X-ray: Usually the first imaging test performed, showing vertebral alignment, height loss and the general pattern of a fracture.
Computed Tomography (CT) Scan: Provides detailed, cross-sectional images of the bone, helping to clarify the exact fracture pattern and whether bone fragments have entered the spinal canal.
Magnetic Resonance Imaging (MRI): Used to assess whether a fracture is recent or old, and to evaluate the spinal cord, nerve roots, ligaments and surrounding soft tissue for associated injury.
Bone Density Scan (DEXA): Measures bone mineral density to diagnose osteoporosis or osteopenia, particularly important when a fracture occurs with little or no trauma.

When a fracture occurs with little or no trauma, further investigation — including a bone density scan and, where malignancy is suspected, additional blood tests or whole-body imaging — helps identify the underlying cause so it can be addressed alongside the fracture itself.

How to Prevent Spinal Fractures

Prevention differs somewhat depending on whether the greater risk is trauma or bone fragility, and often benefits from addressing both.

Always wear a seatbelt while driving or riding in a vehicle, as it significantly reduces the risk of severe spinal injury in a collision
Wear appropriate protective equipment for contact sports, cycling, and other higher-risk physical activities
Keep the home and workplace free of clutter, loose rugs and poor lighting that could contribute to a trip or fall
Maintain a diet rich in calcium and vitamin D, and engage in regular weight-bearing exercise to support long-term bone health
Undergo bone density screening if you are postmenopausal, have a family history of osteoporosis, or have other risk factors for bone loss, so that early treatment can reduce fracture risk
Review medications with a doctor if you are on long-term steroids or other bone-weakening drugs, to discuss bone-protective strategies
Address balance, vision and mobility issues that increase fall risk, particularly in older adults

Recovery and Rehabilitation

Recovery time varies considerably depending on the type of fracture, the treatment approach, and the patient's overall bone health.

Stable compression fractures managed conservatively often heal within 8 to 12 weeks, though pain may improve well before the bone has fully healed
A gradual, physiotherapist-guided return to activity helps restore strength, flexibility and confidence in movement without placing excessive strain on the healing bone
Patients recovering from surgery typically follow a structured rehabilitation programme, progressing from protected movement to increasing activity over weeks to months
For osteoporosis-related fractures, ongoing bone health treatment continues well beyond the healing of the fracture itself, to reduce the risk of future fractures
Fall-prevention strategies and home safety adjustments are often incorporated into rehabilitation for older adults recovering from a spinal fracture