Mechanical and structural characteristics of the new BONE-LOK cortical-cancellous internal fixation device

A 2.7-mm Triage Medical, Inc., HCA with BONE-LOK technology. Note the double-helix distal anchor and movable collar.

Pullout testing apparatus pictured from above. A constant load was placed on both devices until failure occurred.

Three-point bending test of the 2.7-mm HCA. The 3.0-mm CS was tested with an identical setup.

Setup for compression test of the 2.7-mm HCA. The adjustable collar was advanced to create compression until failure occurred. A similar setup was used for the 3.0-mm CS.

Bar chart summarizing pullout strength test data. Pullout strength was greater for the 2.7-mm HCA in both foam densities, but not significantly greater in the #7 foam.

Bar chart summarizing bending test data. Greater load was required to deform the 2.7-mm HCA than the 3.0-mm CS.

Bar chart summarizing compression strength test data. The 2.7-mm HCA clearly outperforms the 3.0-mm CS in both the 7# and 12# foam.