Computer-assisted percutaneous scaphoid fixation: concepts and evolution

Area of Science:

• Orthopedic Surgery
• Medical Technology
• Surgical Innovation

Background:

• Treatment for undisplaced scaphoid waist fractures has shifted from casting to percutaneous screw insertion.
• Percutaneous fixation minimizes open surgery risks but presents technical challenges and radiation exposure.
• Computer-assisted percutaneous scaphoid fixation (CAPSF) is an emerging technique gaining attention.

Purpose of the Study:

• To review the evolution and rationale behind CAPSF.
• To describe the fundamental principles of computer-assisted technology in scaphoid fixation.
• To highlight the potential benefits of CAPSF in orthopedic surgery.

Main Methods:

• Conventional percutaneous scaphoid fixation uses fluoroscopic guidance for guide wire and screw placement.
• Adapting computer-assisted techniques involves addressing challenges in patient tracking and registration.
• Various guidance techniques (2D fluoroscopy, cone-beam CT, ultrasound) and wrist immobilization strategies are employed.

Main Results:

• Five distinct groups have successfully implemented CAPSF systems.
• Strategies for patient tracking and registration have been developed to overcome technical hurdles.
• Diverse guidance modalities have been utilized to circumvent patient-based registration.

Conclusions:

• CAPSF demonstrates potential to significantly decrease radiation exposure during scaphoid fracture treatment.
• The accuracy of percutaneous scaphoid fixation may be improved with computer-assisted methods.
• CAPSF represents a significant advancement in the surgical management of scaphoid waist fractures.