Atypical Bennett's fracture-dislocation

Area of Science:

• Orthopedic Surgery
• Trauma Surgery
• Hand Surgery

Background:

• Bennett's fracture-dislocation is a common injury involving the thumb's trapeziometacarpal joint.
• Understanding the biomechanics and radiographic presentation is crucial for effective management.

Observation:

• An unusual fracture-dislocation of the thumb metacarpal base was observed.
• This case presented with features of Bennett's fracture-dislocation plus proximal fragment rotation.
• This indicates a more severe ligamentous injury than typically seen.

Findings:

• Radiographic analysis revealed unique features of this complex injury.
• The pathomechanics suggest significant force leading to instability.
• Surgical intervention was necessary due to the inherent instability.

Implications:

• This case expands the understanding of thumb metacarpal fracture-dislocation patterns.
• Highlights the importance of recognizing subtle radiographic signs of ligamentous injury.
• Informs surgical decision-making for complex thumb base trauma.