Using heat to straighten curly hair, or to curl straight hair, damages it. She was bent over and could not straighten up at all. Sodium hydroxide is used in some relaxers to straighten hair. He visits scientific laboratories to learn the science behind chemical relaxers that straighten hair. The boy had to undergo orthopedic therapy to straighten his left leg. Straighten out those loops into circles, and let the strips distort into cross-caps. I had hoped that you could straighten him out. Such kittens may develop folded ears initially which then straighten back out. It could take up to 2 hours for the shaft to straighten again. The olecranon serves as a lever for the extensor muscles that straighten the elbow joint. Side effects include infection, damage to nerves and inability to straighten the arm. Jerry promises to straighten things out. During her repairs, work was carried out to straighten, reconstruct and strengthen her hull. In 1905, Morgan accidentally discovered that the liquid could also straighten hair. Afterward the extrusion is stretched in order to straighten it.