Snap Off Compression Pins for 4 Corner Fusion With Case Series

Area of Science:

• Orthopedic surgery
• Hand surgery
• Wrist biomechanics

Background:

• Scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) are debilitating wrist conditions.
• Four-corner fusion is a common surgical treatment for advanced wrist collapse.
• Current techniques carry risks like nonunion and hardware issues.

Purpose of the Study:

• To present a novel cartilage-sparing technique for four-corner fusion.
• To evaluate the benefits of using snap-off compression pins in this procedure.

Main Methods:

• A cartilage-sparing surgical technique for four-corner fusion was developed.
• Snap-off compression pins were utilized for internal fixation.
• The technique avoids disruption of dorsal surfaces and the radiolunate articulation.

Main Results:

• The presented technique provides strong internal fixation.
• Stable compression is achieved with the snap-off pins.
• Implants are positioned to spare cartilage and critical joint articulations.

Conclusions:

• This cartilage-sparing four-corner fusion technique offers a promising alternative.
• It potentially reduces complications associated with traditional methods.
• The method aims for good functional outcomes and patient satisfaction.