A tooth (plural teeth) is a small, calcified, whitish structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are covered by gums.
Symptoms can include: 1  A popping sound (or a popping or snapping feeling) at the time of injury can sometimes be heard (or felt) if a ligament is completely torn. 2  Swelling of your knee. 3  Pain in your knee.  Tenderness around your knee on 1  touching. Not being able to use or move your knee normally.
Depending on the knee ligament sprain or tear, symptoms may vary. With each sprain or tear, pain is usually associated with the injury, as well as swelling and tenderness. The following are common knee ligament sprain and tear symptoms. Keep in mind that each person reacts differently to trauma: Sudden snap or popping noise. Pain in the knee.