Dorsal Approach for Complex Dorsal MCP Dislocation
For complex dorsal dislocations of the metacarpophalangeal (MCP) joint that cannot be reduced by closed means, use the dorsal surgical approach as your primary technique.
Why the Dorsal Approach is Superior
The dorsal approach offers significant advantages over the volar approach for these injuries 1:
- Reduced operative time: Average 45 minutes versus 70 minutes with volar approach
- Eliminates need for secondary approach: 0% required a second incision versus 42% of volar approaches requiring conversion to dorsal
- Better safety profile: Minimizes risk to palmarly displaced neurovascular structures 2, 3
- Superior visualization: Provides direct access to the entrapped volar plate and facilitates management of any osteochondral fractures 4, 2
Technical Considerations
The dorsal approach requires longitudinal splitting of the volar plate to achieve adequate reduction 2. While this may theoretically delay recovery, the clinical evidence demonstrates this is outweighed by the reduced operative time and elimination of secondary procedures.
When Osteochondral Fractures are Present
The dorsal approach is particularly advantageous when the dislocation is complicated by metacarpal head fractures. You can directly visualize and fix the fracture fragments using screw fixation through the same incision 4.
Common Pitfalls to Avoid
- Do not persist with closed reduction attempts once you identify radiographic signs of complex dislocation (widened joint space, sesamoid interposition, skin dimpling without gross deformity) 3
- Do not start with a volar approach - nearly half require conversion to dorsal, increasing operative time and tissue trauma 1
Postoperative Management
Brief immobilization followed by early mobilization at 6 weeks typically restores full function 4. Expect normal range of motion and grip strength by 2-year follow-up with no growth disturbances when properly executed.
The evidence consistently supports the dorsal approach as the primary surgical technique for complex dorsal MCP dislocations, regardless of which digit is involved 1, 2, 3, 5.