An arthroscopic method for reattaching a rotator cuff tendon to a humeral head may include creating a trough in the top of the humeral head, creating a cavity in the lateral portion of the humeral head, creating one or more tunnels between the cavity and the trough, retrieving sutures affixed to a loose end of the tendon through the trough, at least one tunnel, and the cavity and passing the sutures through a tensioning and securing device, which is then implanted in the cavity, and the sutures are variously pulled or released to pull, tension, or release the sutures until the tendon is secured in the trough. The trough is preferably created using a unique extendable, angled surgical burr.