Classification systems for distal radius fractures

Area of Science:

• Orthopedic Surgery
• Radiology
• Medical Imaging

Background:

• Conventional radiography demonstrates fair to moderate reliability in classifying distal radius fractures (DRF).
• The need for improved diagnostic accuracy in DRF classification is critical for treatment planning.

Purpose of the Study:

• To evaluate if incorporating computed tomography (CT) scans enhances the reliability of DRF classification compared to conventional radiography alone.
• To assess the impact of CT on both intraobserver and interobserver reliability across multiple classification systems.

Main Methods:

• A prospective study involving 51 patients with displaced DRF.
• Four observers assessed fractures using Frykman, Fernández, Universal, and AO classification systems, first with radiography alone, then with added CT scans.
• Intraclass correlation coefficient (ICC) was used to measure reliability, with CT serving as the reference standard for accuracy.

Main Results:

• Intraobserver reliability improved with CT for Fernández, Universal, and AO classifications, but not for Frykman.
• Interobserver reliability ranged from poor to fair and did not consistently improve with the addition of CT scans.
• CT scanning demonstrated implications for scoring accuracy, especially in simpler fracture types.

Conclusions:

• Computed tomography (CT) enhances intraobserver reliability for classifying distal radius fractures (DRF) when used with conventional radiography, except for the Frykman system.
• Interobserver reliability in DRF classification remains limited, with no substantial improvement observed through the addition of CT scans.
• CT integration impacts fracture type scoring accuracy, particularly for less complex DRF.