New type of implant for fixation of hamstring tendons for reconstruction of anterior cruciate ligament - results of biomechanical study
Abstract
Introduction: Fixation strength of the implant device is very important during ACL reconstruction with hamstrings. This biomechanical study tested a new prototype of femoral fixation screw developed by Beznoska company (Czech Rep) and compared its performance with other types of hamstring fixation.
Materials and methods: Nine porcine femurs were used for testing. The fixation screw was inserted into the bone and then loaded using materials testing machine at a strain rate of 10mm/min.
The ultimate load to failure test was then performed, displacement to failure and the ultimate load value were recorded. Results: The ultimate load for this fixation device was 987.77 N (SD188.74 N).
In comparison with other fixation methods this screw has similar fixation strength as Rigid-fix (Mitek, USA) 868 N (SD 171 N) or Smart screw ACL (Bionx Implatnts Inc., USA) 794 N (SD 152 N) and superior fixation strength compared with BioScrew (Linvatec Inc., USA) 589 N (SD 204 N). Discussion and summary: There are many types of implants using for ACL reconstruction.
Results of the test were important for the decision whether to promote the screw for conventional production.