Theoretical and Practical Principles of Rigid Internal Fixation

Abstract

To obtain rigid internal fixation that will last for the duration of the healing process, three criteria must be fulfilled:

• a) Anatomical reduction must be accurate in restoring the original shape of the bone.

• b) A mechanically stable unit must be achieved. This can be done either by interfragmentary compression with lag screws, compression plates, traction absorbing wiring or external compression clamps, or by an internal support in the form of a thick medullary nail inserted into a marrow cavity that has previously been reamed out.

• c) The blood supply of the bone fragments must be preserved or conditions provided that will enable revascularization to occur easily.