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Views: 0 Author: Site Editor Publish Time: 2026-07-27 Origin: Site
Introduction
Pediatric radial neck fractures are relatively uncommon injuries, accounting for approximately 5%–10% of all pediatric elbow fractures. Due to the unique anatomy and remodeling potential of children's bones, many minimally displaced radial neck fractures can be successfully treated with conservative management.
However, severely displaced radial neck fractures remain challenging because inadequate reduction may result in restricted forearm rotation, malunion, radial head deformity, and long-term functional impairment.
Traditional open reduction and internal fixation can provide anatomical restoration but may increase the risk of complications, including:
Elbow stiffness
Avascular necrosis of the radial head
Physeal injury
Synostosis between radius and ulna
Therefore, minimally invasive techniques have gained increasing attention. Among these, percutaneous reduction and K-wire fixation provide a simple, effective, and tissue-preserving approach for treating severe pediatric radial neck fractures.
This article introduces the Judet classification, surgical indications, and the detailed technique of percutaneous leverage reduction and fixation using Kirschner wires.
The radial neck is located between the radial head and radial shaft and plays an important role in forearm rotation.
Unlike adults, children's radial neck fractures have several unique characteristics:
The radial head is still developing.
The physis remains open.
The periosteum is thicker and more elastic.
Bone remodeling capacity is stronger.
Because of these characteristics, treatment principles differ from adult fractures.
The main goals of treatment include:
Restoring radial head alignment.
Preserving elbow and forearm rotation.
Minimizing soft tissue damage.
Avoiding injury to the growth plate.
The Judet classification, modified by Métaizeau, is one of the most widely used systems for evaluating pediatric radial neck fractures. It categorizes fractures according to displacement and angulation severity, helping surgeons determine appropriate treatment strategies.
Characteristics
No displacement.
Minimal or no angulation.
Stable fracture pattern.
Treatment
Most Type I fractures can be managed conservatively with:
Immobilization.
Clinical and radiographic follow-up.
Early elbow mobilization after healing.
Characteristics
Mild displacement.
Slight angulation.
The radial head remains relatively aligned.
Treatment
Conservative treatment is usually recommended when:
Angulation is limited.
Elbow and forearm rotation are preserved.
Characteristics
Moderate displacement.
Increased angulation of the radial neck.
Potential limitation of forearm rotation.
Treatment
Depending on patient age and fracture severity:
Closed reduction may be attempted.
Percutaneous reduction techniques may be required if satisfactory alignment cannot be achieved.
Characteristics
Severe angulation.
Significant displacement of the radial head.
The radial head remains partially connected with the radial shaft.
Treatment
Type IVa fractures usually require surgical intervention when:
Angulation exceeds acceptable limits.
Closed reduction fails.
Minimally invasive techniques, including percutaneous K-wire leverage reduction, are preferred whenever possible.
Characteristics
The most severe form of radial neck fracture.
Complete displacement or severe translation of the radial head.
Frequently associated with major soft tissue disruption.
Treatment
These fractures are technically challenging.
Treatment options include:
Percutaneous reduction when feasible.
Open reduction if minimally invasive methods fail.
However, open surgery should be avoided whenever possible because extensive exposure may increase the risk of:
Avascular necrosis of the radial head.
Elbow stiffness.
Growth disturbance.
Percutaneous fixation is mainly indicated for:
Judet III radial neck fractures
Judet IV radial neck fractures
Failed closed reduction
Significant angulation affecting forearm rotation
The advantages include:
Minimal surgical trauma
Reduced risk of avascular necrosis
Preservation of blood supply
Faster recovery
Lower incidence of elbow stiffness
The patient is positioned supine with the affected upper limb placed on an arm table.
After anesthesia:
Standard sterile preparation is performed.
Fluoroscopy is used to evaluate fracture alignment.
The elbow is positioned to allow free manipulation.
A 1.4 mm or 1.8 mm Kirschner wire is selected.
The entry point is approximately:
1 cm proximal to the radial head.
The K-wire is inserted:
From proximal to distal direction.
Along the lateral aspect of the radial neck.
Passing beneath the annular ligament.
The wire advances toward the fracture site.
The K-wire acts as a reduction lever.
The surgical principle is similar to the Kapandji technique used in distal radius fractures.
The reduction mechanism includes:
The K-wire functions as a joystick.
The intact lateral cortex acts as a fulcrum.
Elevating and correcting the displaced radial head fragment restores alignment.
By carefully manipulating the K-wire:
Angulation is corrected.
Radial head alignment is restored.
The fracture is reduced without opening the fracture site.
After satisfactory reduction:
The K-wire is advanced toward the level of the radial tuberosity.
This area contains abundant cancellous bone, providing stronger fixation.
Important technical points:
✔ The K-wire should not penetrate the medial cortex.
Reasons:
Avoid excessive local stimulation.
Reduce the risk of bone overgrowth.
Prevent injury to surrounding structures.
After fixation:
Confirm reduction under fluoroscopy.
Check elbow flexion-extension.
Evaluate forearm pronation and supination.
After fixation:
The K-wire is cut outside the skin.
The elbow is immobilized with:
Elbow flexion at approximately 90°
Forearm positioned in supination
A long-arm cast is applied.
Usually:
Cast and K-wire removal after approximately 3 weeks.
After removal:
Begin progressive elbow motion.
Encourage gradual recovery of forearm rotation.
Early rehabilitation is essential to prevent stiffness.
3-year postoperative follow-up results
During K-wire insertion:
If resistance is encountered before reaching the fracture site, it may indicate that:
The wire is passing through the annular ligament.
The wire has already penetrated the ligament.
Incorrect passage may interfere with postoperative forearm rotation.
Before completing surgery:
The surgeon should actively assess:
Pronation
Supination
Smooth rotation indicates:
Proper K-wire position.
No soft tissue entrapment.
No annular ligament interference.
Aggressive repeated attempts may damage:
Radial head blood supply.
Physis.
Surrounding soft tissue.
The principle should be:
Minimal manipulation, maximum stability.
Compared with open reduction:
Less soft tissue damage.
Lower risk of vascular compromise.
Better preservation of fracture biology.
The procedure requires:
Standard fluoroscopy.
K-wire equipment.
Basic orthopedic skills.
It can be performed in many pediatric trauma centers.
When appropriate indications are followed:
Elbow motion can recover well.
Forearm rotation can be preserved.
Complication rates are reduced.
Potential limitations include:
Difficulty in extremely displaced fractures.
Requirement for surgeon experience.
Risk of inadequate reduction in complex patterns.
Open reduction may still be necessary when:
Closed methods fail.
There is associated elbow injury.
The fracture is severely comminuted.
Current evidence suggests that minimally invasive techniques should be considered whenever anatomical reduction can be achieved without opening the fracture site.
For pediatric radial neck fractures, the treatment philosophy has shifted from:
"Perfect anatomical exposure"
toward:
"Biological preservation and functional restoration."
Percutaneous K-wire leverage fixation follows this principle by:
Maintaining blood supply.
Reducing surgical trauma.
Providing stable fixation.
No.
Small displacement fractures are usually treated conservatively, while severe displaced fractures may require surgery.
Generally around 3 weeks, depending on fracture healing and clinical evaluation.
Possible complications include:
Limited elbow motion
Radial head deformity
Avascular necrosis
Malunion
Proper technique can significantly reduce these risks.
Percutaneous fixation using K-wire leverage reduction is an effective minimally invasive technique for treating displaced pediatric radial neck fractures.
By using the K-wire as a mechanical lever and the lateral cortex as a fulcrum, surgeons can achieve fracture reduction while preserving soft tissues and blood supply.
For Judet III and IV fractures, this technique provides a valuable alternative to open reduction, offering the advantages of simplicity, minimal invasiveness, and favorable functional outcomes.
With increasing emphasis on biological fixation principles, percutaneous techniques will continue to play an important role in pediatric elbow trauma surgery.
