Technique of Split Flexor Carpi Ulnaris Opponensplasty

Area of Science:

• Hand surgery
• Reconstructive surgery
• Orthopedics

Background:

• Opponensplasty is crucial for restoring thumb function.
• Classic donor motor units include flexor digitorum superficialis, extensor indicis proprius, palmaris longus, and abductor digiti minimi.
• These donor sites may not always be available.

Observation:

• A literature review found no prior description of flexor carpi ulnaris opponensplasty.
• The surgical technique for split flexor carpi ulnaris opponensplasty was detailed.
• A clinical case demonstrating the procedure was presented.

Findings:

• The split flexor carpi ulnaris opponensplasty was successfully performed.
• The patient achieved satisfactory thumb opposition, reaching the ring finger tip with the wrist in neutral position.

Implications:

• This technique offers a viable alternative for opponensplasty when standard donors are absent.
• It expands reconstructive options for thumb function restoration.
• Further clinical studies may validate this approach for broader application.