FiberTape is a flat, 2-millimeter-wide surgical suture used to repair torn ligaments, tendons, and other soft tissues during orthopedic surgery. Unlike traditional round sutures, its ribbon-like shape spreads force over a wider area, which reduces the risk of the material cutting through damaged tissue. It’s most commonly used in shoulder, knee, and ankle procedures, though surgeons have recently begun applying it in unexpected areas like cardiac surgery.
How FiberTape Differs From Standard Sutures
A traditional high-strength surgical suture looks like a thin, round thread. FiberTape is made from the same materials, a core of ultra-high-molecular-weight polyethylene wrapped in braided polyester with a silicone coating, but its braids are expanded into a flat, tape-like profile. That wider surface area is the entire point: when a surgeon pulls tissue together, a round suture concentrates force along a narrow line, which can slice through weakened tendon or ligament. A flat tape distributes that same force across a broader footprint.
The strength difference in lab testing is dramatic. In mechanical testing, FiberTape withstood about 806 Newtons of force before breaking, compared to roughly 258 Newtons for a standard round suture of the same material. In cadaveric testing, where the tape is actually anchored through tendon and bone, the gap narrows considerably because the limiting factor becomes the tissue itself, not the suture. Both tape and suture pulled out of tendon at around 153 to 178 Newtons. This means FiberTape’s real advantage isn’t raw breaking strength but its ability to grip tissue without sawing through it.
Shoulder and Rotator Cuff Repair
One of the most common uses for FiberTape is reattaching torn rotator cuff tendons to the bone of the upper arm. The technique most associated with it, often called SpeedBridge, is a knotless repair method where strips of FiberTape are passed through the torn tendon and locked into small anchors drilled into bone. The tape creates a broad, bridge-like compression across the tendon’s footprint, holding it flat against the bone while it heals.
In a modified version of this technique, surgeons use multiple overlapping strips of FiberTape secured by a triangular arrangement of anchors to increase the stability of the repair. Because the tape lies flat, it creates less bulk under the skin than knotted round sutures, and the knotless design eliminates the hard lumps that can irritate surrounding tissue. After surgery, patients typically begin gentle pendulum exercises immediately, progress to passive range of motion within a week, start active strengthening around six weeks, and return to sports at roughly six months.
Knee Ligament Surgery
FiberTape has become a standard tool in knee ligament procedures, particularly for ACL reconstruction and repair. Rather than replacing the ligament entirely, surgeons can use FiberTape to reinforce a graft or a repaired ligament during its most vulnerable healing period. The tape is stitched alongside the graft as an internal brace, absorbing excess force while the biological tissue regains strength.
This approach is also used for medial collateral ligament (MCL) repair and posterolateral corner repair. A systematic review and meta-analysis found that ACL surgeries augmented with FiberTape produced biomechanically stronger repairs, though long-term clinical outcomes were similar to standard reconstruction. The practical benefit is a sturdier construct in the early weeks after surgery, when re-injury risk is highest.
Ankle Ligament Stabilization
Chronic ankle instability, the kind that follows repeated sprains, is one of the areas where FiberTape has shown the clearest advantages over older techniques. The traditional surgical fix, called a Broström repair, involves tightening the stretched-out lateral ankle ligaments with sutures alone. Adding FiberTape as an internal brace nearly doubles the repair’s resistance to rotational stress. In biomechanical testing, a standard Broström repair failed at about 24 degrees of rotational displacement, while a FiberTape-augmented repair held until nearly 47 degrees.
Clinical results back this up. In a study of 148 patients comparing the two approaches, those who received FiberTape augmentation returned to their pre-injury activity level in an average of 13.3 weeks, compared to 17.5 weeks for the standard repair. They also had fewer complications, less recurring pain, and walked sooner after surgery. Only one patient in the FiberTape group failed to complete an accelerated rehab protocol, compared to four in the traditional repair group.
The “Seatbelt” Concept
The reason FiberTape speeds recovery comes down to how healing tissue responds to movement. Tendons and ligaments that experience controlled mechanical loading during recovery develop greater stiffness and strength than tissue immobilized in a cast or brace. Cells within the tendon respond to cyclical stretching by producing more of the structural proteins that give connective tissue its toughness. Tissue held in a zero-strain environment, by contrast, tends to heal weaker.
FiberTape exploits this biology through what surgeons call the “seatbelt” principle. The tape is positioned so that it stays slack during normal, gentle movement but catches and tightens before the joint reaches a range of motion that would overload the healing tissue. Picture a car seatbelt: loose while you lean forward to change the radio, locked the instant you decelerate sharply. This lets patients begin controlled rehab exercises earlier without risking re-tear, and that early loading actually improves the quality of the healed tissue.
Newer Applications in Cardiac Surgery
Surgeons have recently started using polyethylene suture tapes to close the breastbone after open-heart surgery, replacing the steel wires that have been standard for decades. In a study comparing 150 patients closed with steel wires to 150 patients closed with suture tapes, the tape group had lower rates of sternal separation, infection, and postoperative chest pain. Closure time was also shorter. For high-risk cardiac patients, where poor bone healing and infection are serious concerns, the broader force distribution of tape over bone offers the same advantage it provides in tendon repair: less cutting through weakened tissue.
Potential Drawbacks
FiberTape’s wider profile means it has more surface area than a round suture, which raises a theoretical concern about bacterial adherence. More surface area could mean more places for bacteria to colonize if an infection develops. Research directly comparing bacterial adhesion between FiberTape and standard sutures of the same material is still limited, and clinical infection rates have not shown a meaningful difference in the studies available so far.
The flat profile can also make the tape harder to pass through tissue in tight surgical spaces. And while the material itself is extraordinarily strong, the ultimate strength of any repair is limited by the quality of the tissue it’s anchored to. In severely degenerated tendon or weak bone, FiberTape won’t overcome the underlying problem. The tape protects and reinforces a repair, but it doesn’t replace the need for the body’s own healing.