Kambiz Behzadi Presents BMD at LSI London 2025
Load Path Cellular Metal (LPCM) — Architectural Design for Biological Load Sharing
Background:
Orthopedic implant development has long oscillated between two extremes: bulk-metal constructs that are mechanically strong but excessively stiff, and porous architectures that are compliant but structurally fragile. Titanium and cobalt–chromium alloys possess moduli 6–10 × greater than cortical bone, producing stress shielding, proximal bone resorption, and long-term fixation loss. Conversely, porous and lattice metals approximate bone stiffness yet fail at junctions, experience fatigue fracture, and permit micromotion beyond the osteogenic threshold (more than 50 µm).
Objective:
To introduce Load Path Cellular Metal (LPCM)—an architectural framework that integrates bulk-metal reinforcement with graded cellular matrices to achieve the triad of strength, flexibility, and porosity within a single, tunable construct.
Methods:
LPCM applies architectural load-path logic rather than geometric modification. Embedded ribs, planks, and tubes form internal frameworks carrying high-cycle loads (more than 500 MPa). The surrounding porous matrix modulates stiffness (2–20 GPa) and porosity (100–400 µm) to preserve micromotion less than 50 µm and promote osseointegration. Finite-element modeling confirms distributed stress and physiologic strain transfer analogous to native bone.
Results:
LPCM demonstrates multi-objective mechanical optimization: high fatigue strength from the framework, controlled compliance from the matrix, and continuous load transfer that prevents stress shielding. The design supports biological load sharing—bone and implant co-load across physiologic activity, including high-strain conditions.
Conclusion:
LPCM replaces geometry-based “load-path hacks” with true architectural engineering. By merging bulk-metal durability with bone-like compliance, it redefines implant design from static fixation to dynamic, biologically integrated load sharing. This framework represents a feasible, manufacturable, and patent-distinct pathway toward next-generation orthopedic implants capable of restoring natural biomechanics and long-term bone vitality.
Autonomous Orthopedics(Aut-O-Sys): The Future of Precision Surgery
Kambiz Behzadi Presents BMD at LSI Europe ’23
An Alternative to Robotics in Total Hip Arthroplasty – Kambiz Behzadi presented BMD at LSI Europe ‘23 Emerging Medtech Summit.
Vibratory Insertion of Orthopedic Implants
Geotags Screw-sensors and Vibratory Insertion Tool with IMU technology can make use of robotics in hip replacement surgery obsolete, because it can be done with small handheld tools, that do not require registration of the tools, the patient’s bone, or establishment of a 3D coordinate system in the OR space. All you have to do is to calibrate the axis of the tool with the axis of the pelvis, then you can monitor the implant insertion and alignment in true real-time with a simple handheld tool without any bulky equipment in the OR space.
September 1, 2022 – A presentation for the International Society for Technology in Arthroplasty in Hawaii.
Prosthesis Assembly
Standardization of Assembly Technique in Orthopedic Surgery
Dr. Behzadi’s presentation at the LSI USA’23 Emerging MedTech Summit