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

Publication

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

Journal Paper/Review - Jun 1, 2002

Kroeber Markus, Rovinsky David, Haskell Andrew, Heilmann Moira, Llotz Jeff, Otsuka Norman

Units

Orthopädische Chirurgie und Traumatologie des Bewegungsapparates

PubMed

12083576

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.

Type

Journal Paper/Review (English)

Journal

Orthopedics 2002; 25

Publication Date

Jun 1, 2002

Issn Print

0147-7447

Pages

659-62; discussion 663

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.