A Bankart repair is a surgical procedure that reattaches torn cartilage and ligaments inside the shoulder joint after a dislocation has left the joint unstable. The surgery targets a specific injury called a Bankart lesion, where the ring of cartilage lining the shoulder socket gets torn or pulled away from the bone. Without repair, this torn cartilage leaves the shoulder prone to dislocating again, sometimes repeatedly.
The Injury Behind the Surgery
Your shoulder is a ball-and-socket joint where the rounded top of your upper arm bone sits inside a shallow socket on your shoulder blade. A ring of cartilage called the labrum lines and deepens that socket, acting like a bumper that helps keep the ball centered. When your shoulder dislocates, the arm bone gets forced out of the socket and can tear or completely separate this cartilage from the bone. That tear is a Bankart lesion, and it typically occurs along the lower front portion of the socket.
A doctor can pop a dislocated shoulder back into place, but that doesn’t fix the torn labrum. The damaged cartilage leaves the joint loose and unstable. You might notice the shoulder feeling like it shifts too much when you move your arm, particularly when it’s out to the side or across your body. Some Bankart lesions heal on their own, but they often don’t heal well enough to restore full stability, which means the shoulder is likely to dislocate again.
Who Needs the Surgery
Not everyone with a Bankart lesion needs an operation. For people who are less active and have experienced a single dislocation, physical therapy alone can sometimes restore enough stability. But for younger, more active people, the odds of redislocation without surgery are steep. In this high-risk group, redislocation rates have been reported as high as 90% with non-surgical treatment alone.
Surgery is generally recommended when a person has had multiple dislocations, when the shoulder continues to feel unstable despite physical therapy, or when an athlete needs to return to a sport that puts the shoulder at risk. Surgeons also use scoring systems that factor in age, sport type, and the degree of bone and cartilage damage to predict how likely the shoulder is to dislocate again. The timing matters too: the more dislocations that happen before surgery, the worse the outcome tends to be, because each event causes additional damage to the cartilage and surrounding tissue.
How the Procedure Works
Most Bankart repairs are done arthroscopically, meaning the surgeon works through small incisions using a camera and specialized instruments rather than opening the shoulder with a large cut. The core of the procedure involves reattaching the torn labrum to the rim of the socket using small devices called suture anchors.
These anchors are drilled into the bone along the edge of the socket, starting at the lowest point of the tear and working upward. Each anchor holds sutures that the surgeon threads through the torn cartilage and surrounding tissue, then ties down tightly. This pulls the labrum back against the bone and also tightens the joint capsule (the tissue envelope around the joint), reducing the overall looseness. Surgeons typically place a minimum of four to six anchors to recreate a stable “bumper” along the front of the socket. Using fewer than four has been linked to higher rates of the shoulder becoming unstable again.
A newer variation uses knotless anchors that lock the sutures in place without the surgeon having to tie knots inside the joint. This can shave roughly 10 minutes off the procedure time. In terms of outcomes, studies comparing knotless and traditional knotted anchors have found no meaningful differences in redislocation rates, need for revision surgery, or overall functional scores.
Open Surgery vs. Arthroscopic Repair
Open Bankart repair, where the surgeon makes a larger incision to directly access the joint, was the standard approach for decades and still has a role. A meta-analysis comparing the two techniques found that open repair produces slightly more stable shoulders afterward, with recurrence rates below 10%. Arthroscopic repair, on the other hand, tends to preserve more range of motion. The tradeoff is real: patients who get the open procedure may end up with a stiffer shoulder, while those who get the arthroscopic version have a slightly higher chance of experiencing instability again. For most patients today, arthroscopic repair is the default choice, but open surgery may be preferred when the tissue damage is extensive or other factors make the arthroscopic approach less reliable.
When Bone Loss Changes the Plan
Repeated dislocations don’t just damage cartilage. They can also chip away at the bone along the front edge of the socket. When enough bone is missing, a soft tissue repair alone won’t hold. The traditionally accepted threshold was 20% to 25% bone loss, but more recent evidence suggests the critical cutoff is closer to 15% of the socket’s width. Beyond that point, reattaching the labrum can’t restore normal joint mechanics, and surgeons will typically recommend a bone grafting procedure (such as a Latarjet, which transfers a small piece of bone to rebuild the socket rim) instead of a standard Bankart repair.
Recovery Timeline
Recovery follows a structured progression that takes several months. For the first four weeks, you’ll wear a sling whenever you’re outside the home. During this phase, a therapist will gently move your arm for you (passive motion only) to prevent stiffness, gradually increasing how far the shoulder can go. You can use your elbow, wrist, and hand right away, and light cardio like a stationary bike is fine as long as the sling stays on.
Between weeks two and four, you’ll start very light isometric exercises, where you contract muscles without actually moving the joint, along with scapular squeezes and basic rowing movements. Resistance band work for the rotator cuff begins around weeks four to six, but nothing that pushes your arm behind your body.
From weeks six to ten, the focus shifts to regaining full range of motion and adding progressive resistance training. By week ten to twelve, most people are close to symmetrical motion compared to the other shoulder, though subtle differences are normal. Strengthening continues to build through this phase with resisted rows, rotator cuff exercises, and lower body work.
Returning to Sports and Full Activity
Six months is the most commonly cited timeline for returning to sports after arthroscopic Bankart repair, though the range varies widely depending on the sport and the individual. Non-contact activities like swimming or jogging can often resume at three to four months. Contact and overhead sports typically require five to seven months, and competitive play may take closer to nine or ten months. A study of teenage athletes found the average time to return to any sport was about 6.6 months, but getting back to pre-injury competitive levels averaged 10.6 months.
Functional testing usually begins around week 16 and involves a battery of assessments: stability tests with resistance bands, push-up variations that challenge core and shoulder control, single-arm hop tests, and endurance tests for the rotator cuff. These aren’t just formalities. Passing them, particularly hitting benchmarks like 85% of the opposite arm’s strength on posterior shoulder endurance testing, helps confirm that the repair is solid enough to handle the demands of sport.
Recurrence Rates After Surgery
Arthroscopic Bankart repair is effective for most people, but it doesn’t guarantee the shoulder will never become unstable again. A large meta-analysis estimated the overall recurrence rate at about 17%, after adjusting for the likelihood that studies with poor results are less likely to be published. When recurrence was defined strictly as a full dislocation, the rate was lower, around 11%. When subluxations (partial slips) and persistent feelings of looseness were included, the rate climbed to about 16.5%.
Several factors influence the odds. Patients with more bone loss, a history of many dislocations before surgery, or participation in high-demand overhead or contact sports face higher recurrence risk. Having the surgery done sooner after the first dislocation, before the cartilage and bone accumulate more damage, consistently leads to better long-term results.