Axial and shear pullout forces of composite, porcine and human metatarsal and cuboid bones.

ABSTRACT:

Objectives

The varying mechanical properties of human bone have influence on the study results. Pullout and shear forces of human bone were compared to different substitutes to evaluate their suitability for biomechanical studies.

Methods

After bone mineral density (BMD) determination, axial pullout tests were performed with cortical 3.5 mm nonlocking (NL) and 2.7 mm head locking (HL) screws on human, porcine and polyurethane composite bones. Porcine and human constructs were additionally loaded in shear direction.

Results

Apparent BMD was significantly lower in osteoporotic (159 mgHA/ccm ± 56) and nonosteoporotic (229 mgHA/ccm ± 25) human bone than that in porcine bone (325 mgHA/ccm ± 42; p < 0.01). Axial construct stiffness and ultimate pullout force of porci

SUBMITTER: Lenz M 

PROVIDER: S-EPMC6071584 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature