A NEW POINT CONTACT-DYNAMIC COMPRESSION PLATE BIOMECHANICAL EVALUATION
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    Abstract:

    To determine the mechanical properties(stiffness)and compression force of a new design of point contact plate,with the ability of dynamic compression for reducing the gap at the fracture site and enhancing the stability.Methods:A device wasused compare the compression force of point contact-dynamic compression plate(PC-DCP)with that of dynamic compression plate(DCP)when a cortical screw was placed at compression position.In20paired fresh cadaveric sheep tibiae,mid-shaft transverse osteotomies were created and fixed with PC-DCPs and DCPs.In10pairs,compression force was applied at the fracture sites.In the other10paires,there was a3-mm gap between the fracture sites.Four point bending and torsion tests were conducted to determine the bend-ing and torsion stiffness.Results:there were no statistically significant differences in compression force between the DCPs and PC-DCPs (p>0.05).Whether there was a bone gap or not,no significant differences in bending and torsion stiffness were seen.between the two experimental plates(p>0.05).Conclusion:The PC-DCP can ap-ply a comparable compression force between the fracture gap.Mechanically,the PC-DCP plate has adequate sta-bility in clinical application.

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ZHAO Yu-feng, LI Qi-hong, GU Zu-chao, XU Jian-zhong, YANG Liu. A NEW POINT CONTACT-DYNAMIC COMPRESSION PLATE BIOMECHANICAL EVALUATION[J]. Journal of medical biomechanics,2002,17(1):58-62

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