Three-Dimensional Mapping of Distal Clavicle Fractures: Displacement Patterns and Clinical Implications for Surgical...

Area of Science:

• Orthopedic Surgery
• Radiology
• Biomechanical Engineering

Background:

• Current distal clavicle fracture classifications primarily focus on coronal plane displacement.
• Existing methods often underestimate injury complexity and multiplanar instability on standard radiographs.
• There is a need for improved characterization of fracture patterns to guide surgical strategies.

Purpose of the Study:

• To develop and validate a three-dimensional (3D) fracture mapping technique for distal clavicle fractures.
• To characterize multiplanar displacement patterns in distal clavicle fractures.
• To provide mechanistic insights for optimizing surgical interventions and classification systems.

Main Methods:

• Retrospective analysis of 81 distal clavicle fractures using CT scans.
• Manual simulated repositioning of fracture lines and superimposition onto a standard clavicle template.
• Generation of 3D fracture maps and heatmaps to quantify displacement (shortening, horizontal/vertical displacement) and angulation in three planes.

Main Results:

• Fracture lines were predominantly in the distal third of the clavicle, concentrated at the acromion end.
• The majority of displaced fractures exhibited multidirectional displacement (posterior, superior, shortening) and angulation.
• Analysis quantified spatial positioning and displacement angles, revealing complex injury patterns.

Conclusions:

• Most displaced distal clavicle fractures involve multiplanar displacements and angulations.
• Three-dimensional (3D) analysis is crucial for accurate fracture reduction, stability assessment, and treatment guidance.
• 3D fracture mapping enhances classification accuracy and informs tailored imaging and fixation strategies.