What is the most common type of dislocation?

The most common type of dislocation is the edge dislocation. An edge dislocation occurs when a portion of a crystal lattice is displaced in a direction parallel to the dislocation line. This type of dislocation is often found in materials that have been subjected to plastic deformation, such as metals and polymers. Edge dislocations can also be created by the growth of new crystals, such as in the case of snowflakes.