caa a22 4500 605459258 CHVBK 20210128100233.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00167-014-3055-9 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3055-9 In vitro comparison between cortical and cortico-cancellous femoral suspension devices for anterior cruciate ligament reconstruction: implications for mobilization [Elektronische Daten] [Cristina Rodríguez, Tomás García, Susana Montes, Luis Rodríguez, Antonio Maestro] Purpose: To analyse the capability of cortical and cortical-cancellous suspension devices to provide a strong fixation in order to follow an aggressive early mobilization protocol. Methods: Anterior cruciate ligament (ACL) reconstruction was performed in vitro on 40 porcine femurs employing a high-strength braided cord as a graft. Four femoral suspension devices were analysed: the cortical suspension devices Endobutton and XO Button and the cortical-cancellous suspension devices Biosteon Cross-pin and Cross-pin ACL. Two kinds of biomechanical testing were carried out: static and post-fatigue failure strength tests. Stiffness, failure load, elongation at failure load, elongation after 20 cycles and elongation after 1,000 cycles were assessed. The bones were cut after testing to analyse the failure pattern. Results: All of the devices exceed 50% of total elongation in the first 20 cycles of fatigue. In the static failure tests, there were significant differences (p<0.05) in elongation to failure between the cortical-cancellous suspension devices Biosteon Cross-pin and Cross-pin ACL and the cortical suspension device Endobutton. No significant differences were found in the failure tests after 1,000 cycles of loading. The failure mode of the cortical devices comprised breakage of the cortical bone, accompanied by introduction of the device into the tunnel. The failure mode of the cortical-cancellous devices was pin breakage accompanied by tunnel enlargement. Conclusion: The first cycles of mobilization are critical for elongation. This mobilization process does not significantly diminish the mechanical characteristics of the reconstructions. All the fixations support an intensive early mobilization protocol, with loads of over 500N. Springer-Verlag Berlin Heidelberg, 2014 Biomechanics nationallicence Anterior cruciate ligament reconstruction nationallicence Surgical fixation devices nationallicence Rehabilitation nationallicence Rodríguez Cristina University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut García Tomás University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut Montes Susana University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut Rodríguez Luis Orthopaedic Surgery and Sport Medicine, FREMAP, Juan Carlos I, 1, 33212, Gijón, Spain aut Maestro Antonio Orthopaedic Surgery and Sport Medicine, FREMAP, Juan Carlos I, 1, 33212, Gijón, Spain aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2324-2329 0942-2056 23:8<2324 2015 23 167 https://doi.org/10.1007/s00167-014-3055-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3055-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rodríguez Cristina University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut NATIONALLICENCE 700 1- García Tomás University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut NATIONALLICENCE 700 1- Montes Susana University Institute of Industrial Technology of Asturias (IUTA), University of Oviedo, Edificio Departamental Oeste. 7.1.17. Campus Universitario de Gijón, 33203, Gijón, Spain aut NATIONALLICENCE 700 1- Rodríguez Luis Orthopaedic Surgery and Sport Medicine, FREMAP, Juan Carlos I, 1, 33212, Gijón, Spain aut NATIONALLICENCE 700 1- Maestro Antonio Orthopaedic Surgery and Sport Medicine, FREMAP, Juan Carlos I, 1, 33212, Gijón, Spain aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/8(2015-08-01), 2324-2329 0942-2056 23:8<2324 2015 23 167