The JVL Research Center is recognized internationally for major contributions to the understanding of the effects of implant design features on fixation. The researchers developed the first composite synthetic femur for biomechanical testing in the 1980’s, now widely available. Numerous biomechanical models have been established for the evaluation of fixation of different types of implants.
Current Research
Over the last few years, various aspects of implant design and fixation have been evaluated using custom load simulators. Some of the questions that have been addressed have been:
•What is the relative influence of proximal stem geometry on initial fixation?
•What is the influence of cement thickness on fixation?
•How much proximal bone is required to achieve stable fixation?
•What is the optimal surface finish for a cemented femoral stem?
Researchers
Sophia Sangiorgio, PhD
Eddie Ebramzadeh, PhD
Sang-Hyun Park, PhD
Selected Publications
Sangiorgio, S. N., Ebramzadeh, E., Knutsen, A. R., Borkowski, S. L., Kalma, J. J., & Bengs, B. C. (2013). Fixation of non-cemented total hip arthroplasty femoral components in a simulated proximal bone defect model. The Journal of Arthroplasty, 28(9), 1618-1624.
Sangiorgio, S. N., Longjohn, D. B., Dorr, L. D., & Ebramzadeh, E. (2011). Challenges in relating experimental hip implant fixation predictions to clinical observations. Journal of Biomechanics, 44(2), 235-243.
Sangiorgio, S. N., Longjohn, D. B., Dorr, L. D., & Ebramzadeh, E. (2011). The influence of proximal stem geometry and surface finish on the fixation of a double-tapered cemented femoral stem. Journal of Biomechanics, 44(1), 22-27.
Bengs, B. C., Sangiorgio, S. N., & Ebramzadeh, E. (2008). Less range of motion with resurfacing arthroplasty than with total hip arthroplasty: in vitro examination of 8 designs. Acta Orthopaedica, 79(6), 755-762.
Sangiorgio, S. N., Longjohn, D. B., Lee, J. L., Alexander, J. D., Dorr, L. D., & Ebramzadeh, E. (2008). Simulation of extreme loads on the proximal femur for implant fixation assessment. Journal of Applied Biomaterials and Biomechanics, 6(2), 72-80.
Sangiorgio, S. N., Ebramzadeh, E., Longjohn, D. B., & Dorr, L. D. (2004). Effects of dorsal flanges on fixation of a cemented total hip replacement femoral stem. Journal of Bone and Joint Surgery, 86(4), 813-820.
Ebramzadeh, E., Sangiorgio, S. N., Longjohn, D. B., Buhari, C. F., & Dorr, L. D. (2004). Initial stability of cemented femoral stems as a function of surface finish, collar, and stem size. Journal of Bone and Joint Surgery, 86(1), 106-115.
Ebramzadeh, E., Sangiorgio, S. N., Longjohn, D. B., Buhari, C. F., Morrison, B. J., & Dorr, L. D. (2003). Effects of total hip arthroplasty cemented femoral stem surface finish, collar and cement thickness on load transfer to the femur. Journal of Applied Biomaterials and Biomechanics, 1(1), 76-83.