There are six different Graston Technique instruments. The shape and size of each instrument varies based on the area that it is designed to treat. However, all Graston Technique instruments sport a curved edge and a concave or convex shape that are designed for optimum comfort and efficiency.
The Graston Technique helps break down scar tissue forms either due to a tear in a tissue or ligament, over which scar tissue forms a bridge-like structure, or when soft tissue areas do not receive sufficient amounts of oxygen. Scar tissue differs from normal tissue in a couple of ways. First, scar tissue is not nearly as flexible as normal tissue, so areas that have scar tissue often have reduced mobility. Second, scar tissue does not lend strength to the body as healthy muscle tissues do since scar tissue is designed to function only as a bridge that joins the healthy tissue on two sides of a damaged area together.
When scar tissue forms over a damaged or oxygen-deprived area, it replaces the normal tissue that formerly occupied that space, thereby reducing the amount of tissue in that area that lends the body strength. Additionally, scar tissue may produce pain, either due to nerve entrapment, which occurs when scar tissue traps a nerve against the muscle, or due to the pain nerve endings that exist in scar tissue. Breaking up scar tissue may increase mobility and strength and reduce pain.