Authors of section

Authors

Tania Ferguson, Daren Forward

Executive Editor

Richard Buckley

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Basic technique: spring hook plates

1. Pearl: Spring hook plates

Principle

Spring hook plates can stabilize posterior wall fragments that are too small or too peripheral for lag screws. They are available pre-contoured or are prepared from small fragment one-third tubular plates.

Be careful to ensure that the hooks of the spring plate do not impale the labrum and are far enough away from the edge of the joint not to scratch the femoral head.

basic technique spring hook plates

Pre-contoured plate

basic technique spring hook plates

Cut off the plate

In many countries, it is satisfactory to use a one-third tubular plate as it is inexpensive. Take a three or four-hole one-third tubular plate. Cut off the tip through a hole.

basic technique spring hook plates

Bend the ends into hooks

Bend the newly created prongs downwards to create small hooks.

basic technique spring hook plates

Overbend the hook

The shape of the hook plate should be more convex than the underlying bone, so that tightening its screw compresses the hooks against the fragment to be stabilized.

Proper alignment is achieved by compressing the fragments against the femoral head.

Great care must be taken to ensure that the hooks do not penetrate the articular surface. Radiographs do not demonstrate violation of the articular surface.

basic technique spring hook plates

Fixation of the spring plate

Typically, single screw fixation of the spring plate is insufficient. Therefore, the spring plate is positioned under the definitive posterior wall plate, as illustrated.

These supplementary plates provide additional buttress support for the comminuted fragments, as well as direct stabilization via the hooks.

basic technique spring hook plates