Compliant Joint Reconstruction

Compliant Intramedullary Stems

Although knee replacement is a common procedure that successfully treats knee osteoarthritis, some knee replacement implants do not last the remaining lifetime of the patient. When these implants fail, patients face increasingly invasive revision operations with decreasing chances of success. The objective of this project is to increase the lifespan of revision knee replacement implants by incorporating a new mechanism that accommodates rotational motion into the tibial stem. This new mechanism has the potential to reduce the risk of aseptic loosening by decreasing cross-shear within the mechanism without adding a new wear surface.

  • Project Lead: Armin Pomeroy
  • Surgical Collaborator: Drs. Nelson SooHoo and Alexandra Stavrakis (Orthopaedic Surgery, UCLA)
  • Project Team: Brandon Peterson, Dean Chen, John McCullough, Prof. Jonathan B. Hopkins, Prof. Hani Haider

Relevant Publications

  • J. A. Mccullough, B. T. Peterson, A. M. Upfill-brown, T. J. Hardin, J. B. Hopkins, N. F. Soohoo, and T. R. Clites. Compliant Intramedullary Stems for Joint Reconstruction. IEEE J. Transl. Eng. Heal. Med. vol. 12, pp. 1–13, 2024.
  • Chen, D., Pomeroy, A., Peterson, B.T., Flanagan, W., Lim, H.K., Stavrakis, A., SooHoo, N.F., Hopkins, J.B., & Clites, T.R., Hard-Stop Synthesis for Multi-DOF Compliant Mechanisms. Journal of Mechanical Design. (under review)
  • 2. A. W. Pomeroy, A. Upfill-Brown, B. T. Peterson, D. Chen, J. Weisenburger, A. Stavrakis, H. Haider, N. F. Soohoo, J. B. Hopkins, T. R. Clites. “Compliant Tibial Stem for Primary Total Knee Arthroplasty,”. IEEE J. Transl. Eng. Heal. Med. (under review).