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Updated: Feb 4, 2026

Biomechanical Testing of Murine Tendons
Published on: October 15, 2019
Biomechanical analysis of a double fixation method for tendon graft in porcine tibia - using an interference screw
Luis Antônio de Ridder Bauer1, Hermes Augusto Agottani Alberti1, Vitor Gustavo de Paiva Corotti1
1Universidade Federal do Paraná (UFPR), Curitiba, PR, Brazil.
Objective:
The aim of the study was to compare the mechanical behavior of interference screw tibial fixation vs. screw-plus-staple tibial fixation in an animal model.
Methods:
Thirty-six pieces of swine knee specimens were selected and divided into two groups: Group 1, tibial fixation with interference screw (n = 17), and Group 2, fixation with interference screw and staple (n = 19). The models were submitted to a single cycle of tension testing. The following variables were measured: graft cross-sectional area, failure point on 10 mm (F10), yield load (Fy), and stiffness.
Results:
The mean values of graft cross-sectional area, F10, Fy, and stiffness did not present significant differences between the groups.
Conclusion:
The addition of a second staple-type ligament fixation device, complementing the interference screw, did not increase the mechanical safety of the system.
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