Multi-Axis Biomedical Testing Machines

Simulation of human joint motion for the purpose of testing and evaluating prosthetic devices prior to clinical deployment is essential to assure the successful outcome of such surgical procedures.  AMTI’s multiaxis simulator machines provide the ideal environment for in-vitro wear, fatigue, and usability testing on a variety of prosthetic joint components.

VIVO NEW! VIVO Six D.O.F. Joint Simulator enables more realistic biomechanics research and implant life testing. The VIVO provides accurate robotic joint motion simulation of daily activities for knee, hip, shoulder, temporomandibular, elbow, ankle and spinal joint motions.

ADL-Force 5 AMTI's single station joint simulator has undergone a face lift! New look, same unparalleled testing! View here:
Up to twelve different physiological motions can be sequenced to define a particular lifestyle. Orthopaedic implants can therefore be accurately evaluated under conditions that truly replicate those experienced in everyday movement. The design also allows the machine to be used as a load frame for bending, tension and compression tests.

ADL-Knee-06-08 ADL Knee 6 Station Simulator Video (Opens New Window)

ADL-Hip-12-08  ADL Hip 12 Station Simulator Video (Opens New Window)

AMTI simulator products include the latest innovative developments in technology:

  • Activities of Daily Living - increased forces and ranges of motion simulating a more real life test, eg. walking up and down stairs, getting out of a bath, squatting to pick something up and running and even swinging a golf club.
  • Virtual Soft Tissue Control (VST) software model for the replication of in vivo kinetics and kinematics during movement.  This is a revolutionary technology (* US Patent Number 7823460 *) used in its wear simulators. VST eliminates the need for mechanical springs by using an advanced software model to incorporate the constraining influence of the soft tissue that surrounds the joint. This allows for the inclusion of nonlinear and asymmetric force displacement characteristics which occur in vivo but cannot be recreated with conventional methods.  The VST control system opens up a number of exciting new research opportunities in simulation and kinematic study of TKR performance. Soft tissue modelling can be used to create a variety of surgical conditions such as cruciate sacrificing and cruciate sparing procedures. The effects of alignment, mal-alignment and ligament balance can also be investigated.
  • Adaptive Control Technology, a breakthrough in simulator ease of use and dramatic reduction in tuning time from days to minutes. The ACT control system is enabled by a press of a button and within thirty or forty cycles of motion the RMS error is reduced to a level not obtainable with manual tuning. 
  • Improved Tracking performance in both force and displacement control modes of operation conforming to ISO and ASTM standards. 
  • Microseparation to simulate laxity in the constraining tissue of the hip (where appropriate) during the swing phase of gait. 

Ortho-POD  6 Station Pin on Plate wear testing machine Video (Opens New Window)

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NEW VIVO enables more realistic implant wear testing than ever possible before.  It's six degrees of freedom, broader range of motion and soft tissue constraint system enables testing of real-world implant failure modes, such as adverse edge loading conditions, micro-separation, stem and cup impingement and joint subluxation.