Palmer and Werner's 1981 cadaveric study of 61 wrist specimens defines the TFCC as a single inseparable anatomical complex. Using dissection and biomechanical testing, the paper establishes the TFCC's dual role: axial load cushioning for the ulnar carpus and primary stabilizer of the DRUJ. It directly answers why TFCC injury produces both wrist pain and instability, and why complete excision is harmful.
When a patient with ulnar-sided wrist pain has a positive arthrogram showing radiocarpal-to-DRUJ dye leak, that confirms a TFCC perforation — but not necessarily a traumatic tear. Palmer's data show most perforations are degenerative, driven by ulnar variance and chronic abutment. The perforation is the result of the pain-generating process, not its cause.
This paper is the reason complete TFCC excision fell out of favor. Removing the entire complex drops ulnar load transmission from 40% to 5% and eliminates the primary restraint to DRUJ dislocation. Trading one problem for two worse ones.
In practice: when you evaluate ulnar-sided wrist pain, measure ulnar variance on the AP radiograph. Ulnar-positive wrists carry a fourfold higher perforation rate and are the candidates for ulnar shortening osteotomy, not TFCC excision.
The 70% rate of concurrent lunotriquetral ligament disruption in wrists with TFCC perforations is a reason to assess LT stability whenever a TFCC tear is confirmed. These injuries rarely travel alone.
Palmer and Werner's 1981 cadaveric study of 61 wrist specimens defines the TFCC as a single inseparable anatomical complex. Using dissection and biomechanical testing, the paper establishes the TFCC's dual role: axial load cushioning for the ulnar carpus and primary stabilizer of the DRUJ. It directly answers why TFCC injury produces both wrist pain and instability, and why complete excision is harmful.
When a patient with ulnar-sided wrist pain has a positive arthrogram showing radiocarpal-to-DRUJ dye leak, that confirms a TFCC perforation — but not necessarily a traumatic tear. Palmer's data show most perforations are degenerative, driven by ulnar variance and chronic abutment. The perforation is the result of the pain-generating process, not its cause.
This paper is the reason complete TFCC excision fell out of favor. Removing the entire complex drops ulnar load transmission from 40% to 5% and eliminates the primary restraint to DRUJ dislocation. Trading one problem for two worse ones.
In practice: when you evaluate ulnar-sided wrist pain, measure ulnar variance on the AP radiograph. Ulnar-positive wrists carry a fourfold higher perforation rate and are the candidates for ulnar shortening osteotomy, not TFCC excision.
The 70% rate of concurrent lunotriquetral ligament disruption in wrists with TFCC perforations is a reason to assess LT stability whenever a TFCC tear is confirmed. These injuries rarely travel alone.