Causes
Bankart lesions occur when the upper arm bone becomes dislocated and exerts pressure on the soft labrum, causing it to separate from the bony glenoid. These lesions are commonly caused by injuries such as a direct impact to the shoulder, falling onto an outstretched arm, or experiencing a sudden pull. Additionally, Bankart lesions can develop gradually over time due to repetitive motions, such as those involved in weightlifting or throwing activities.
Soft vs. Bony Bankart Lesion
When it comes to Bankart lesions, there are two main types: soft and bony. A soft Bankart lesion occurs when the labrum tears away from the glenoid, involving only the soft tissue. On the other hand, a bony Bankart lesion is characterized by a torn labrum accompanied by a fracture or break in a section of the bony glenoid. Although less common, bony Bankart lesions are generally more severe in nature. They can result in significant bone loss within the glenoid, ultimately leading to chronic instability.