Researchers injected 3 milliliter volumes of either Simplex P PMMA or Kryptonite Bone Cement CTBC into contralateral screw tracts of six cadaveric sacra. Screws were inserted immediately after the injection, followed by a 12-hour setting period where the sacrum was potted in a custom fixture and mounted into the frame of a materials testing machine.
The researchers observed that the PMMA-augmented screws required more loading cycles and a larger applied movement to reach six degrees of rotation than the CTBC-augmented screw.
Read the abstract about augmentation for sacral screw fixation.
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