A Bankart repair is a surgical procedure that reattaches torn tissue inside the shoulder joint to restore stability after a dislocation. Specifically, it fixes a “Bankart lesion,” which is a tear of the labrum, the ring of cartilage that lines the rim of the shoulder socket and helps keep the ball of the upper arm bone in place. This tear occurs in over 97% of first-time traumatic shoulder dislocations, and when it doesn’t heal on its own, the shoulder can keep slipping out of place.
What a Bankart Lesion Does to Your Shoulder
Your shoulder socket is surprisingly shallow. The labrum is a thick ring of tissue around the socket’s edge that deepens it and acts as a bumper, giving the joint much of its stability. Under a microscope, the labrum has a layered structure: a thin outer mesh of woven collagen fibers (only about 200 micrometers thick), a dense core of fibers running around the socket’s rim, and a transitional zone near the joint surface.
When the shoulder dislocates, the labrum tears away from the front-bottom edge of the socket. This detachment, called a Bankart lesion, does two things: it reduces the effective depth of the socket, and it stretches out the ligament that normally restrains the shoulder from sliding forward. Together, these changes make the joint mechanically unstable. Once multiple dislocations have occurred, the chances of the labrum healing on its own become very small.
How Doctors Diagnose the Tear
Physical examination can strongly suggest a Bankart lesion, but imaging confirms it. An MRI with contrast dye injected into the joint (called an MR arthrogram) is the preferred diagnostic tool. The dye fills the joint space and outlines the labrum, making tears easier to spot. MR arthrograms detect labral tears with 74 to 96% sensitivity and 91 to 98% specificity.
A standard MRI without contrast is less reliable. Without fluid highlighting the labrum’s edges, sensitivity drops to roughly 52 to 55%, meaning it misses about half of tears. If your surgeon suspects a Bankart lesion and a standard MRI looks normal, an arthrogram or direct visualization during arthroscopy may be the next step.
Who Needs the Surgery
Not every shoulder dislocation leads to the operating room. Surgery is typically considered when recurrent instability, repeated dislocations, or a persistent feeling that the shoulder is about to slip out interferes with daily comfort and function. Doctors generally recommend trying a structured strengthening program for 6 to 12 weeks first. If exercises fail to restore confidence and stability in the shoulder, surgery becomes the next option.
People who experience atraumatic instability (looseness that develops without a clear injury) may also be candidates if rehabilitation alone doesn’t work. The key deciding factor is whether the shoulder remains functionally unreliable despite consistent effort in physical therapy.
What Happens During the Procedure
Most Bankart repairs are done arthroscopically, meaning the surgeon works through a few small incisions using a camera and specialized instruments rather than opening the joint fully. The core of the operation involves reattaching the torn labrum to the socket rim using small devices called suture anchors.
The surgeon begins by placing the camera through a small portal in the back of the shoulder to see the damage. Through a second portal in the front, they position a drill guide on the face of the socket, starting as low as the 6 o’clock position. A small hole is drilled, and a biocomposite anchor (about 3 millimeters wide) is tapped into the bone. Sutures attached to the anchor are then passed through the labrum and the surrounding capsule, pulling the tissue back up to its original position on the socket rim. Knots are tied arthroscopically and kept away from the joint surface to avoid scraping the cartilage.
Additional anchors are placed moving upward along the socket’s edge, creating multiple fixation points. The goal is to rebuild the labrum’s “bumper” effect and tighten the stretched capsule at the same time, reducing the extra volume inside the joint that allowed the shoulder to slip.
Recovery and Rehabilitation Timeline
Recovery follows a structured progression. For the first four weeks, you’ll wear a sling for comfort and protection, especially outside the home. Very gentle range-of-motion exercises begin almost immediately, though they’re limited: in the first two weeks, forward elevation is capped at about 75 degrees, and outward rotation at only 15 degrees.
Light strengthening starts between weeks two and four. This includes gentle isometric exercises (pushing against resistance without moving the arm), shoulder blade squeezes, and lower body work you can do while still in the sling. As weeks pass, range of motion is gradually increased and the strengthening program intensifies.
Most athletes return to sports around 5 months after surgery, though the range spans from 3 to 9 months depending on the sport and the surgeon’s protocol. Six months is the most commonly cited benchmark. Contact and collision athletes often fall on the longer end of that spectrum. Return is guided less by the calendar and more by whether strength, range of motion, and confidence in the shoulder have been fully restored.
Success Rates and Recurrence Risk
Arthroscopic Bankart repair succeeds in the majority of cases, but it isn’t bulletproof. Recent studies report recurrence rates of 4 to 19%, with a pooled average around 15.3% across large patient groups. Age is the strongest predictor: among patients 19 or younger, 29.1% experienced another instability event after surgery, compared to 13.2% of those 20 and older. Younger patients tend to be more active and have more years of shoulder use ahead, both of which raise the risk.
The overall complication rate is very low at 0.67%. Frozen shoulder (significant stiffness) is the most common complication, occurring in about 0.32% of cases. Persistent pain follows at 0.17%. Nerve injury, hardware problems, and wound complications are each well below 0.1%.
When a Bankart Repair Isn’t Enough
A standard Bankart repair works best when the socket itself is structurally intact. When repeated dislocations have worn away bone from the socket’s edge, the repair has less surface area to anchor into, and the failure rate climbs. The critical threshold is about 15% of glenoid width: once bone loss exceeds that mark, a different procedure called a Latarjet is generally preferred.
The Latarjet procedure transfers a small block of bone from a nearby part of the shoulder blade to the front of the socket, effectively rebuilding the missing rim. Studies show it produces lower recurrence rates and better functional outcomes in patients with significant bone loss or a high number of prior dislocations. A large dent on the humeral head (the ball side of the joint) that catches on the socket rim during movement is another factor that may tip the decision toward Latarjet. Your surgeon will use imaging to measure bone loss and determine which procedure gives the best chance of lasting stability.