TFCC Repair (Triangular Fibrocartilage Complex)

Why this approach — at MOS

The distinction between central and peripheral TFCC tears is not just academic — it drives the treatment decision. At Maryland Orthopedic Specialists, MR arthrogram (MRI with contrast injected into the wrist joint) is preferred over standard MRI for suspected TFCC pathology because it better delineates the tear location, the degree of ulnocarpal ligament involvement, and the presence of a DRUJ communication. This imaging distinction guides pre-operative planning.

Intraoperatively, arthroscopic assessment with probing is the gold standard for TFCC tear characterization. The decision to débride versus repair is confirmed on the arthroscopic findings, not solely by pre-operative imaging. A peripheral tear that appears partial on MRI may be a complete peripheral detachment under the probe — these require suture repair, not débridement.

For patients presenting through our Montgomery County offices with ulnar-sided wrist pain — whether post-traumatic or of gradual onset — we follow a systematic approach: imaging, conservative treatment, and then arthroscopic treatment when indicated. Positive ulnar variance, if present and symptomatic, may be addressed with ulnar-shortening osteotomy as a concurrent or staged procedure in selected cases.

Who is a candidate?

Indications

• Persistent ulnar-sided wrist pain for 3–6 months after conservative management with confirmed TFCC tear on MRI or MR arthrogram
• Traumatic peripheral TFCC tear with distal radioulnar joint instability (the forearm bones feel loose with rotation)
• DRUJ instability causing weakness, clicking, or instability with forearm rotation
• Failed conservative treatment of a central TFCC tear with persistent pain
• TFCC tear associated with distal radius fracture requiring concurrent treatment

Contraindications

• Degenerative central TFCC tear in a patient without significant functional limitation — observation is appropriate
• Advanced ulnocarpal arthritis where the underlying joint disease is the primary pain generator
• Active infection over the wrist

Conservative Treatment First

Most TFCC tears — particularly central tears and partial peripheral tears without DRUJ instability — are managed non-surgically first. The standard conservative protocol includes wrist immobilization in a short-arm cast or splint for 4–6 weeks to allow the acute inflammatory phase to settle. In patients with positive ulnar variance, the ulnar carpal load is increased, and splinting that unloads the ulnar side is particularly helpful.

Corticosteroid injection into the radiocarpal joint can reduce TFCC-related synovitis and provide lasting relief in patients with primarily inflammatory symptoms. Hand therapy focused on strengthening the forearm rotators and wrist stabilizers can compensate for TFCC incompetence in patients without complete DRUJ instability. When these measures fail after 3–6 months of consistent effort, arthroscopic assessment and treatment is the next step.

The procedure

What Is TFCC Repair?

TFCC repair is surgery to treat a tear in the triangular fibrocartilage complex — the cartilage and ligament structure on the ulnar (pinky) side of the wrist. Central tears are treated with arthroscopic débridement; peripheral tears with good healing potential are repaired with sutures. The TFCC stabilizes the distal radioulnar joint and cushions the ulnar side of the wrist.

The triangular fibrocartilage complex (TFCC) is a structure on the inner (ulnar) side of the wrist that serves two functions: it acts as a cushion absorbing forces transmitted through the ulnar side of the wrist, and it holds the distal radioulnar joint (DRUJ) stable — the joint that allows the forearm to rotate (pronation and supination). The TFCC is composed of the articular disk (the cartilaginous pad), the dorsal and volar radioulnar ligaments, the ulnolunate and ulnotriquetral ligaments, and the extensor carpi ulnaris tendon subsheath.

TFCC tears are classified as traumatic (Palmer Class I) or degenerative (Palmer Class II). Traumatic tears typically result from a fall on an outstretched hand with the forearm in rotation, a sudden rotational force, or a distal radius fracture that tears the TFCC. Degenerative tears are caused by years of repetitive loading, often combined with positive ulnar variance (when the ulna is slightly longer than normal), and tend to affect the central disc and associated ligaments gradually.

The location of the tear within the TFCC determines the treatment. Central tears, which occur in the avascular central zone of the disc, cannot heal with suture repair — they are treated by trimming the torn edges (débridement). Peripheral tears, which occur at the attachment of the TFCC to the ulnar capsule and ulnar styloid, fall in a vascularized zone and can be repaired with sutures, restoring both healing potential and joint stability.

What Happens During TFCC Repair?

Setting: Performed at an ambulatory surgery center under regional or general anesthesia. The procedure takes 45–75 minutes depending on the complexity of the tear and whether concurrent procedures are needed.

Setup: Wrist arthroscopy position with traction on the fingers. Standard dorsal portals are established (see Wrist Arthroscopy page for portal details).

Diagnostic assessment: The TFCC is examined systematically. The trampoline test — pressing on the central disc with a probe — assesses disc tension. A lax, soft disc indicates a peripheral detachment. The hook test (inserting a probe under the TFCC edge) assesses ulnar attachment integrity. The Geissler grade of any associated scapholunate ligament injury is also assessed.

Central tear débridement: For central tears, a motorized shaver is used to trim the torn disc edges back to a stable margin without removing healthy tissue. The goal is to eliminate the unstable flap that catches during wrist motion, not to remove large amounts of disc substance. An adequate residual rim of TFCC must be preserved to protect the ulnocarpal joint.

Peripheral tear repair: For peripheral tears, sutures are passed arthroscopically through the TFCC tissue and through the dorsal ulnar capsule using a curved needle device or a suture shuttle. The sutures are tied outside the joint over the capsule, pulling the torn TFCC back against the vascular capsular tissue where healing can occur. Some surgeons prefer an outside-in suture technique; others use an all-inside device. The DRUJ is assessed after repair to confirm restoration of stability.

A sugar-tong splint is applied with the forearm in neutral rotation at the end of the procedure.

Recovery timeline

Frequently Asked Questions