Publication

Biomechanical testing of bioabsorbable cannulated screws for slipped capital femoral epiphysis fixation

Journal Paper/Review - Jun 1, 2002

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Citation
Kroeber M, Rovinsky D, Haskell A, Heilmann M, Llotz J, Otsuka N. Biomechanical testing of bioabsorbable cannulated screws for slipped capital femoral epiphysis fixation. Orthopedics 2002; 25:659-62; discussion 663.
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Type
Journal Paper/Review (English)
Journal
Orthopedics 2002; 25
Publication Date
Jun 1, 2002
Issn Print
0147-7447
Issn Electronic
Pages
659-62; discussion 663
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Brief description/objective

This study compared cannulated 4.5-mm bioabsorbable screws made of self-reinforced poly-levolactic acid to cannulated 4.5-mm steel and titanium screws for resistance to shear stress and ability to generate compression in a polyurethane foam model of slipped capital femoral epiphysis fixation. The maximum shear stress resisted by the three screw types was similar (self-reinforced poly-levolactic acid 371 +/- 146 MPa, steel 442 +/- 43 MPa, and titanium 470 +/- 91 MPa). The maximum compression generated by both the self-reinforced poly-levolactic acid screw (68.5 +/- 3.3 N) and the steel screw (63.3 +/- 5.9 N) was greater than that for the titanium screw (3 +/- 1.4 N, P <.05). These data suggest cannulated self-reinforced poly-levolactic acid screws can be used in the treatment of slipped capital femoral epiphysis because of their sufficient biomechanical strength.