TY - JOUR
T1 - Assessment of implant internal stresses under physiological femoral loading
T2 - Translation to a simplified bending load model
AU - Muehling, M.
AU - Sandriesser, S.
AU - Dendorfer, S.
AU - Augat, P.
N1 - alle außer Dendorfer: Lehr-KH: Institute for Biomechanics, BG Unfallklinik Murnau, Prof.-Küntscher-Str. 8, 82418 Murnau, Germany; Institute for Biomechanics, Paracelsus Medical University, Strubergasse 21, 5020 Salzburg, Austria
PY - 2024/7
Y1 - 2024/7
N2 - The success of surgical treatment for fractures hinges on various factors, notably accurate surgical indication. The process of developing and certifying a new osteosynthesis device is a lengthy and costly process that requires multiple cycles of review and validation. Current methods, however, often rely on predecessor standards rather than physiological loads in specific anatomical locations. This study aimed to determine actual loads experienced by an osteosynthesis plate, exemplified by a standard locking plate for the femoral shaft, utilizing finite elements analysis (FEA) and to obtain the bending moments for implant development standard tests. A protocol was developed, involving the creation and validation of a fractured femur model fixed with a locking plate, mechanical testing, and FEA. The model 's validation demonstrated exceptional accuracy in predicting deformations, and the FEA revealed peak stresses in the fracture bridging zone. Results of a parametric analysis indicate that larger fracture gaps significantly impact implant mechanical behavior, potentially compromising stability. This study underscores the critical need for realistic physiological conditions in implant evaluations, providing an innovative translational approach to identify internal loads and optimize implant designs. In conclusion, this research contributes to enhancing the understanding of implant performance under physiological conditions, promoting improved designs and evaluations in fracture treatments.
AB - The success of surgical treatment for fractures hinges on various factors, notably accurate surgical indication. The process of developing and certifying a new osteosynthesis device is a lengthy and costly process that requires multiple cycles of review and validation. Current methods, however, often rely on predecessor standards rather than physiological loads in specific anatomical locations. This study aimed to determine actual loads experienced by an osteosynthesis plate, exemplified by a standard locking plate for the femoral shaft, utilizing finite elements analysis (FEA) and to obtain the bending moments for implant development standard tests. A protocol was developed, involving the creation and validation of a fractured femur model fixed with a locking plate, mechanical testing, and FEA. The model 's validation demonstrated exceptional accuracy in predicting deformations, and the FEA revealed peak stresses in the fracture bridging zone. Results of a parametric analysis indicate that larger fracture gaps significantly impact implant mechanical behavior, potentially compromising stability. This study underscores the critical need for realistic physiological conditions in implant evaluations, providing an innovative translational approach to identify internal loads and optimize implant designs. In conclusion, this research contributes to enhancing the understanding of implant performance under physiological conditions, promoting improved designs and evaluations in fracture treatments.
KW - Bone biomechanics
KW - Euler-Bernoulli-Beam-Theory
KW - Femoral fracture
KW - Finite elements analysis
KW - Simplified loading model
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pmu_pure&SrcAuth=WosAPI&KeyUT=WOS:001268494500001&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1016/j.jbiomech.2024.112229
DO - 10.1016/j.jbiomech.2024.112229
M3 - Original Article (Journal)
C2 - 39004041
SN - 0021-9290
VL - 172
JO - JOURNAL OF BIOMECHANICS
JF - JOURNAL OF BIOMECHANICS
M1 - 112229
ER -