Biomechanical comparison between BioScrew and titanium alloy interference screws for bone-patellar tendon-bone graft fixation in anterior cruciate ligament reconstruction

David N.M. Caborn, William P. Urban, Darren L. Johnson, John Nyland, David Pienkowski

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

This investigation compared the maximum load at failure of BioScrew (Linvatec Corp, Largo, FL) and titanium alloy interference screw femoral fixation using a human cadaveric model that approximated the anatomical orientation and physiological strain rate of in vivo bone-patellar tendon- bone (BPTB) graft loading following anterior cruciate ligament reconstruction. Eighteen fresh-frozen human BPTB allografts (10-mm wide, 10- mm thick, 25-mm long bone plugs) with either BioScrew or titanium alloy (Ti 6Al4V) screw (7 x 25 mm) fixation were compared for maximum load at failure at a strain rate of 20 mm/minute. Nine cadaver femurs with bone mineral densities of 0.88 ± 0.18 g/cm2 (anterior/posterior) and 1.3 ± 0.24 g/cm2 (lateral) received the allografts. No statistical differences were observed in maximum load at failure (P = .95) or failure mode (P = .11) between specimens fixed with either screw type. When biomechanically tested with anatomic orientation and at functionally relevant strain rates, the BioScrew provided maximum load at failure equal to a titanium alloy screw.

Original languageEnglish
Pages (from-to)229-232
Number of pages4
JournalArthroscopy
Volume13
Issue number2
DOIs
StatePublished - Apr 1997

Keywords

  • Anterior cruciate ligament reconstruction
  • Graft fixation
  • Interference screw

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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