Traditional, non-locking plates, must be anatomically contoured to the surface of the bone.
In most cases, minimal contouring of the central part of the plate is required.
The most proximal and distal region of the bone generally requires more contouring.
2. Locking plates
Locking plates may need some contouring; they should not be more than 2 mm away from the surface of the bone.
3. Compression plates
Compression plates must be prestressed to produce a 1-2 mm gap between the plate and the bone at the fracture sites. Over bending of the plate at the fracture lines ensures even compression across the fracture lines.
4. Relation between plate function and load bearing
When using a compression or neutralization plate, the load is shared between the implant and the bone column. When using a bridging plate, the load is completely borne by the implant.