Greenstick Fracture – Bone Fracture in Children
A greenstick fracture is an incomplete bone fracture that occurs almost exclusively in children, where the bone bends and breaks on one side while the other side remains intact.
Things worth knowing about "Greenstick fracture"
A greenstick fracture is an incomplete bone fracture that occurs almost exclusively in children, where the bone bends and breaks on one side while the other side remains intact.
What is a Greenstick Fracture?
A greenstick fracture is a unique type of bone fracture that occurs almost exclusively in children and adolescents. The name comes from the behavior of a fresh, flexible twig: when bent, it breaks on one side while the other side remains intact. Similarly, in a greenstick fracture, the bone does not break all the way through. Only the outer layer of the bone (the cortex) on the tension side cracks, while the compression side stays intact, resulting in an incomplete fracture.
Causes
Greenstick fractures are caused by bending forces applied to the still-soft and flexible bones of children. Common causes include:
- Falls onto an outstretched hand or arm (most frequent cause)
- Direct impact to the limb
- Sports injuries, such as during cycling, climbing, or gymnastics
- Everyday play accidents
Because children's bones contain more collagen and are less mineralized than adult bones, they are more flexible and prone to incomplete fractures rather than complete breaks.
Commonly Affected Bones
Greenstick fractures most commonly occur in the following bones:
- Forearm: the radius and ulna (most frequent location)
- Lower leg: tibia and fibula
- Clavicle (collarbone)
- Finger bones (phalanges)
Symptoms
Symptoms of a greenstick fracture can vary depending on severity. They are often less pronounced than those of a complete fracture, which can make diagnosis more challenging:
- Pain at the affected site, especially when pressure is applied or the limb is moved
- Swelling and possible bruising around the injury
- Limited range of motion in the affected limb
- Possible mild angulation (bending deformity) of the bone
- No complete loss of stability, as the bone remains connected
Diagnosis
Diagnosis is typically confirmed through an X-ray. The X-ray image characteristically shows a one-sided cortical break while the opposite side of the bone remains intact. In some cases, additional imaging such as computed tomography (CT) or ultrasound may be used for a more detailed assessment of the fracture.
Treatment
Treatment depends on the degree of angulation and the bone involved:
Conservative Treatment
Most greenstick fractures are managed conservatively. The affected limb is immobilized in the correct position, usually using a cast or a splint. Immobilization typically lasts 3 to 6 weeks, depending on the child's age and the location of the fracture. Due to the high regenerative potential of children's bones, greenstick fractures generally heal completely without lasting complications.
Reduction
If significant angulation is present, the bone must be reduced (realigned) before immobilization. This is usually performed under mild sedation or brief general anesthesia.
Surgical Treatment
Surgery is rarely required for greenstick fractures. It is only considered in cases of severe malalignment or fractures in critical anatomical locations.
Healing and Prognosis
The prognosis for greenstick fractures is excellent. Children's bones have a remarkable capacity for remodeling, meaning that minor residual deformities can be corrected naturally as the child grows. In the vast majority of cases, full recovery without permanent impairment is expected.
References
- Weinberg, A. M. & Tscherne, H. (Eds.) - Unfallchirurgie im Kindesalter. Springer Medizin Verlag, Berlin/Heidelberg (2006).
- German Society for Pediatric Surgery (DGKCH) - Guidelines on Fractures in Children. AWMF Clinical Practice Guidelines.
- Rockwood, C. A. et al. - Fractures in Children. Lippincott Williams & Wilkins, Philadelphia (2010).
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