caa a22 4500 605459169 CHVBK 20210128100232.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00167-013-2768-5 doi (NATIONALLICENCE)springer-10.1007/s00167-013-2768-5 Regional mechanical properties of human patellar tendon allografts [Elektronische Daten] [Adam Yanke, Rebecca Bell, Andrew Lee, Elizabeth Shewman, Vincent Wang, Bernard Bach Jr.] Purpose: Very little is known regarding regional biomechanical properties of patellar tendon allografts. Methods: Ten human bone-tendon-bone (BTB) patellar grafts were separated into equal thirds and underwent cyclic and failure testing. Grafts were non-irradiated and processed using proprietary sterilization methods. Results: The central third was the thickest region (4.9±0.4mm) compared to the medial and lateral (p<0.05). The lateral third was the longest region (58.8±8.8mm) compared to the medial (47.9±8.5mm) and central (47.2±8.8mm) portions (p<0.05). Cyclic testing demonstrated no regional differences with respect to elongation (n.s.) and creep strain (n.s.). Failure testing demonstrated increased maximum load and stiffness in the central region (1,680±418N and 278±67N/mm, respectively) as compared to the medial (1,033±214N, p<0.002, 201±37N/mm, p<0.03) and lateral thirds (908±412N, p<0.03, 173±66N/mm, p<0.002). Elongation at maximum load did not vary between regions. Central region maximum stress (41.0±12.5MPa) was greater than that of the medial third (28.1±3.6MPa, p<0.02), with strain at maximum stress larger in the central third (0.21±0.03) compared to lateral (0.16±0.03, p<0.01). Conclusions: The central third of a non-irradiated, human bone-patellar tendon-bone construct is thicker and biomechanically superior to the medial and lateral regions in most respects. These findings reinforce the use of the central third of a patellar tendon allograft in anterior cruciate ligament reconstruction. Further investigations are required to determine whether the decreased biomechanical properties of the medial and lateral third of the BTB construct negatively influence the mechanical function of hemi-BTB grafts. Springer-Verlag Berlin Heidelberg, 2013 Anterior cruciate ligament reconstruction nationallicence ACL nationallicence Morphology nationallicence Biomechanics nationallicence Bone-patellar tendon-bone allograft nationallicence Yanke Adam Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut Bell Rebecca Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut Lee Andrew Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut Shewman Elizabeth Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut Wang Vincent Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut Bach Jr. Bernard The Claude Lambert-Helen S. Thomson Professor in Orthopedic Surgery, Division of Sports Medicine, Rush University Medical Center, Chicago, IL, USA aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 961-967 0942-2056 23:4<961 2015 23 167 https://doi.org/10.1007/s00167-013-2768-5 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/s00167-013-2768-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yanke Adam Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 700 1- Bell Rebecca Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 700 1- Lee Andrew Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 700 1- Shewman Elizabeth Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 700 1- Wang Vincent Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 700 1- Bach Jr Bernard The Claude Lambert-Helen S. Thomson Professor in Orthopedic Surgery, Division of Sports Medicine, Rush University Medical Center, Chicago, IL, USA aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 961-967 0942-2056 23:4<961 2015 23 167