Human motion capture (MOCAP) systems are vital while determining the loads occurring at the joints. Most of the clinical MOCAP systems are very costly, requiring investment and infrastructure. Therefore, alternative technologies are in demand. In this study, a novel markerless wearable MOCAP system was assessed for its compatibility with a biomechanical modeling software. To collect evidence, experiments were designed in two stages for quantifying the range of motion (ROM) of the hip joint, in vitro and in vivo. Three constrained single-plane motions—abduction/adduction, flexion/extension, and internal/external rotation movements of the active leg—were analyzed. The data were collected from 14 healthy volunteers, using the wearable system and a medical grade optoelectronic MOCAP system simultaneously and compared against. For the in vitro study, the root-mean-square error (RMSE) for the abduction/adduction motion of the hip joint was calculated as 0.11 deg/0.30 deg and 0.11 deg/0.09 deg, respectively, for the wearable and the opto-electronic system. The in vivo Bland–Altman plots showed that the two system data are comparable. The simulation software is found compatible to run the simulations in offline mode. The wearable system could be utilized in the field of biomechanics software for running the kinetic simulations. The results demonstrated that the wearable system could be an alternative in the field of biomechanics based on the evidence collected.

Biomedical engineering (BME) is a multidisciplinary field, resulting in a heavy course load from different fields. We hypothesize that the engineering curriculum be tailored according to the requirements of the BME profession. In this study, we focus on the teaching of the finite element modeling (FEM) technique by redesigning the course to address the needs of the BME profession by some custom-made changes to meet the unmet needs. After the completion of the course, evaluation methods of the students were analyzed and detailed over a survey providing feedback from the students. The surveys were related to the teaching the theory of FEM, the laboratory sessions, and the project sessions. The survey results were evaluated using statistical methods. The Pearson correlation coefficient showed a linear agreement between theoretical and practical sessions indicating efficient blending of skills because of the custom-made changes. The survey analysis showed that the students were in favour of the changes, allowing them to be more resourceful and confident with their skills. The positive results indicate a positive attitude among the students towards their profession. As the course design addresses the needs of the profession allowing students to fit in better, the students might follow their own profession after graduation. A wider follow-up study might be planned next to compare the results between who received tailor-designed courses and those who did not.

Objective: The aim of this study was to evaluate whether the locking femoral neck plate (LFNP) can be an alternative fixation method to the cannulated screws with a medial buttress plate. For this purpose, we compared biomechanically the LFNP and cannulated screws with or without a medial buttress plate in Pauwels type 3 femoral neck fractures. Methods: A vertical fracture model was created at an 80-degree angle to the femoral neck in 28 synthetic bone models. The models were randomly divided into 4 groups, each containing 7 bones each. The bone fracture models were fixed with 3 parallel cannulated screws in group 1, 3 parallel cannulated screws combined with a medial buttress plate in group 2, LFNP in group 3, LFNP combined with a medial buttress plate in group 4. The stability of the specimens was tested biomechanically at a 7° valgus inclination to simulate normal 2-legged weight-bearing through an anatomical femur. The forces corresponding to 0.5 mm, 1 mm, 1.5 mm, and 2 mm displacement and failure loads were calculated in all groups. Results: The axial load values corresponding to 4 di!erent fracture displacements and the failure load values of the groups were compared, group 1 was significantly weaker (P < .05 for each) while group 4 was significantly stronger (P < .05 for each) compared to the other groups. There was no statistically significant di!erence between group 2 and group 3 (P > .05 for each). Conclusion: The results of this biomechanical study showed that the LFNP fixation system provided su"cient biomechanical stability for unstable Pauwels type 3 femoral neck fractures. The biomechanical performance of LFNP was similar to that of cannulated screws with medial buttress plate and better than that of cannulated screws alone. This suggests that LFNP can be a promising stable alternative fixation method to cannulated screws with a medial buttress plate in unstable femoral neck fractures Cite this article as: Onder Y, Bulut T, Eroglu O.N., Ciklacandir S, Isler Y. Biomechanical comparison of locking femoral neck plate versus cannulated screws with or without a medial buttress plate in Pauwels type 3 femoral neck fractures. Acta Orthop Traumatol Turc., 2024;58(6):313-317