VIVO™ Bringing New Life to Joint Motion Simulation FORCE AIMD MOTION

Joint Motion Simulator AMTI’S VIVO brings joint motion simulation, dramatically increasing simulation realism. It provides realistic simulation of knee, hip, shoulder, temporomandibular, elbow, ankle and spinal joint motions. Its advanced control capabilities and extended range of motion enable simulating activities of daily living. VIVO’s patented design provides a fully servo controlled six degree-of-freedom environment in which to test total joint replacements as well as biological joint specimens. In addition to implant wear and lifetime durability testing, VIVO enables testing of real world...

Six-Axis Orthopaedic Testing System MODULAR DESIGN & LARGE SAMPLE AREA DEGREE OF FREEDOM 1. Axial load 2. Flexion RANGE 4500 N Compression 3500 N Distraction 110° G-S, 200° Max Capable of performing short-term kinematic and long-term durability evaluations, the configurable VIVO can have from one to three test stations. Each station is equipped with six servo-hydraulic actuators. The stations are programmed independently. Setups may be copied so that stations can perform the same test procedure. VIVO’s substantial sample workspace accommodates large test specimens such as shoulders and total...

CONTROL FEATURES ENHANCE REALISM The unique lower actuator design provides a floating instant center of rotation on the lower platen. This more accurately simulates in-vivo joint conditions and eliminates joint alignment issues found in legacy test machine designs. VIVOTM also saves test sample preparation time and enables more reliable life testing through its flexible, programmable software implementation of soft tissue constraints - no need to mount constraining hardware to each test specimen. TEMPERATURE-CONTROLLED ENVIRONMENTAL FLUID SYSTEM Simulation of an implant's in-vivo environment...

Advanced Soft Tissue Models “VIVO’s multi-fiber ligament model uses a database of ligament fiber elements...” values are calculated and applied to the joint to model the 6-DOF cross coupling of the actual soft tissue structures. The ligament fiber calculations are performed in real time at every control tick so they are always exactly synchronized with the joint’s pose. VIVOSIM SOFTWARE VIVO SOFT TISSUE MODELS he implanted joint is a composite of biological structure and artificially engineered components. Understanding kinematics, kinetics and durability of the implanted joint structure requires...

POWERFUL SIMULATION CONTROL SOFTWARE VIVO's simulation control software, running on a PC, provides the user interface, supervisory functions and powerful motion programming tools. The control system accepts six reference waveforms, which are temporal signals representing either the kinematics or kinetics of a particular physiologic activity. DESIGNED FOR LONG SERVICE LIFE For compactness and maximum service life, VIVO utilizes an all-hydraulic actuator design. The main bearing of the system uses a hydrostatic design to, provide low friction, more accurate control, and long life. AMTI’s unique...

Technical Data ISO & ASTM VIVO performs a wide range of testing standards— capable of performing tests to ISO 14242-1 ISO 14243-1 ISO/CD 14243-3 ISO 14879-1 ISO 16402 ISO18192-1 ISO/TR 22676 ISO 7206-4 ASTM F1223-08 ASTM F2790-10 ASTM F2694-07 ASTM F2777-10 ASTM F2028-08 ASTM F1829-98 HARDWARE REQUIREMENTS & DIMENSIONS VIVO requires an external 5.5 MPa (800 psi) hydraulic power supply. Overall VIVO system dimensions shown below do not include the computer or hydraulic power unit. VIVO OVERALL DIMENSIONS_PER TEST STATION Height 1900 mm SPECIMEN WORKING AREA WITH ABDUCTION /ADDUCTION GIMBAL Vertical...

SPECIFICATIONS CONTINUED Vertical Actuator Flexion IE Rotation Y (AP) Translation X (ML) Translation Abduction/Varus External hydraulic power supply Pressure Required Flow Oil Temperature Fz force & position Mx torque & position Mz torque & position Fy force & position Fx force & position My torque & position Fx, Fy, Fz, Mx, My, Mz native axes. Automatically mapped to G-S axes. AVAILABLE CONTROL MODES Force or displacement control Torque or displacement control Torque or displacement control Force or displacement control Force or displacement control Torque or displacement control Required, quoted...

SPECIMEN FLUID RECIRCULATION SPECIFICATION COMMENT Pump Fluid Level SPECIMEN FLUID TEMPERATURE High/Low SPECIFICATION Temperature Controller SPECIMEN FLUID SPECIFICATION Suitable fluids VIVO™ 60 RPM peristaltic with #25 silicone tubing Stainless steel tank Magnetic sensor/float COMMENT Thermoelectric Bovine serum, saline solution, water MEASUREMENT INSTRUMENTATIONDATA ACQUISITION CHANNEL Data Rate ADC Resolution Digital Filters Anti-Aliasing Filters All channels All channels All channels All channels MULTI-AXIS LOAD CELL CHANNEL Axial Load Fz RANGE COMMENT 2000 samples/sec 14 bit none, 10-300...

SPECIFICATIONS CONTINUED NETCONTROL INTERFACE_SPECIFICATION COMMENTS Included Computer Hardware Windows based PC and accessories REAL-TIME CONTROLLER Pentium Controller CHANNELS_RANGE Intel Core 2, 3.4 GHz COMMENTS Double precision floating point math Update Rate Output Channels Analog Inputs Digital Inputs RDI Link ONTROL MODES State Space Control Iterative Virtual Soft Tissue Multi-Fiber Ligament Model WAVEFORM GENERATOR Channels Repetition Rate Programmable SPECIFICATION 6 axes per station Every axis Every axis 100 fibers Per Station High-level analog Digital I/O COMMENTS Force or Position...

Service & Support BACKED BY GLOBAL SUPPORT AMTI offers state-of-the-art technical support and field service through its ASAP service plan. The ASAP plan provides remote support from AMTI engineers and substantial discounts for on-site preventative maintenance and other post-warranty service needs. The ASAP plan is highly customizable and can be constructed to meet the specific requirements of your lab. The AMTI sales team will be happy to assist you in determining the options that provide the greatest benefit to you. As an ISO 9001-certified company, AMTI is committed to the constant evaluation...