Ideally, there should be no slippage between the tissue and its clamp.
Ligaments are easier to mount because the bone at either end of the tissue.
Methods of gripping soft tissue are less reliable. The jaws of the test machine can directly grasp the cut end of the tendon or a folded cloth tape which is sutured to the tendon end. These methods are less than ideal because they do not uniformly grip the tendon. The tendon in the clamp is then frozen to the shape of the clamp teeth, allowing an extremely strong holding connection. The tendon is frozen only to a point quite close to the clamp.