Topographic Localization of the Extensor Retinaculum A Cadaveric Study

Area of Science:

• Orthopedic Surgery
• Anatomy

Background:

• The extensor retinaculum is a crucial anatomical structure in the wrist.
• It serves as a donor graft material for various reconstructive surgeries, including annular pulley and ligament repairs.

Purpose of the Study:

• To determine the precise anatomical relationship between the extensor retinaculum and the radial and ulnar styloid landmarks.
• To provide valuable data for surgical planning in wrist reconstructions.

Main Methods:

• Gross dissection of 12 cadaver wrists under loupe magnification.
• Identification and marking of the proximal and distal extents of the extensor retinaculum.
• Measurement of retinaculum distances from the radial and ulnar styloids.

Main Results:

• On the radial side, the extensor retinaculum measured 29.7 ± 3.8 mm in length.
• On the ulnar side, the extensor retinaculum measured 20.3 ± 2.9 mm in length.
• Consistent measurements were observed relative to the radial and ulnar styloids.

Conclusions:

• The extensor retinaculum demonstrates a predictable anatomical relationship with the radial and ulnar styloids.
• These findings are clinically relevant for surgeons utilizing the extensor retinaculum in reconstructive procedures.
• Accurate landmark identification aids in optimizing graft harvesting and surgical outcomes.