Barton's Fractures

Barton's fracture is a fracture-dislocation of the distal radius involving the volar or dorsal articular rim with associated carpal subluxation. It was first described by Irish surgeon John Rhea Barton in 1838.

Distal radius articular anatomy:

The distal radius has two distinct articular rims:

• Volar rim: Stronger, with attachment of volar radiocarpal ligaments
• Dorsal rim: Thinner, with attachment of dorsal radiocarpal ligaments

The key biomechanical principle is that the carpus and rim fragment move as a single unit due to the intact ligamentous connections.

History:

• Mechanism (fall, position of wrist at impact)
• Energy level (high-energy vs low-energy)
• Hand dominance
• Occupation and functional demands
• Previous wrist injuries
• Medical comorbidities

Physical examination:

Neurovascular assessment:

• Median nerve: Most at risk with volar Barton
  • Sensation: thumb, index, middle finger palmar surface
  • Motor: abductor pollicis brevis (opposition weakness)
  • Acute carpal tunnel may develop
• Ulnar nerve: Assess if medial displacement
• Radial artery: Palpate at wrist
• Capillary refill: All digits

Associated injuries to assess:

• DRUJ instability (piano key sign after reduction)
• TFCC injury
• Scapholunate ligament injury
• Ulnar styloid fracture
• Carpal fractures

Differential diagnosis:

Post-traumatic arthritis:

Rehabilitation principles:

• Stable fixation allows early motion
• Balance protection with mobilization
• Hand therapy optimizes outcomes
• Watch for signs of complication (pain, weakness, numbness)

Outcomes with operative treatment:

Modern surgical treatment of Barton's fractures produces good to excellent results in the majority of patients. Key outcome determinants include:

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Long-term considerations:

• Post-traumatic arthritis risk correlates with reduction quality
• Symptomatic arthritis may require salvage procedures (fusion, arthroplasty)
• Hardware removal in 15-20% for irritation

Global epidemiology

Barton's fracture is an uncommon pattern, accounting for a small proportion of the very large global burden of distal radius fractures (one of the most common fractures worldwide, with a characteristic bimodal distribution: younger patients sustaining high-energy injuries and older patients with osteoporotic fragility falls). Volar Barton's is encountered more frequently than the dorsal (reverse) variant, which is genuinely rare, with the largest published surgical series numbering only ~20 cases (Lozano-Calderón et al., PMID 16818974). The defining articular-rim-plus-subluxation pattern is consistent across populations; resource setting affects access to CT and to low-profile fragment-specific implants rather than the injury itself.

Major guidelines, side by side

The dedicated evidence base for Barton's fractures is limited to retrospective series, so guidance is largely extrapolated from the wider distal radius and partial-articular fracture literature. The strongest unifying recommendation across bodies is that displaced partial articular (rim) fractures with carpal subluxation are surgical and that fixation should be driven by fracture pattern.

Registry evidence

Major arthroplasty registries (NJR, AJRR, AOANJRR, SHAR, Norwegian, NZJR) do not track fracture-fixation implants such as distal radius plates, so there is no registry-level survivorship data specific to Barton's fixation; the evidence base is therefore confined to single-centre series and comparative cohorts (e.g. Tang et al., PMID 22868605).

Global practice variation

• Implant choice: volar locking plates are the default for volar Barton's worldwide; in limited-resource settings, non-locking buttress plates or K-wire/external-fixation constructs remain in use and still achieve union, though with modestly lower functional scores (Tang et al., PMID 22868605).
• Dorsal Barton's: managed by dorsal buttress plating where low-profile implants are available; fragment-specific or wire fixation is substituted where they are not.
• Imaging: CT for pre-operative planning is routine in high-resource centres but selectively used elsewhere; the lateral radiograph remains the universal diagnostic view.