Continuum Blue

Polymeric Total Disc Replacement

(TDR) Wear & Durability Analysis

Ranier Technologies (UK)

Fatigue, Cycles to Failure & Wear Assessment of a Total Disc Replacement (TDR) according to various ISO & ASTM Standards (ISO 18192-1, ISO 18192-2 & ASTM F2346-05 & ASTM F2423-05)

  • Cadisc-C Disp animated with logo,every 1 frame.gif
  • Cadisc-C Von.mises animated with logo,every 1 frame.gif
  • Cadisc-L Displacement animated with logo,every 1 frame.gif
  • Cadisc-L Von.Mises animated with logo,every 1 frame.gif
 Physics:  Hyperplastic Materials | Graduated Material Regions | Contact | Load & Motion Cycles | Solid Mechanics (Stress-Strain) | Fracture & Failure Mechanics (Fatigue)

 Scope:  Total disc replacements (TDR) have shown major benefits over cages when it comes to spine mechanics & restoration of patient mobility. However TDRs have stringent FDA & CE test requirements to overcome prior to going on to clinical trials. In this analysis we assess two novel polymeric TDR designs for the Lumbar (Cadisc-L) & Cervical (Cadisc-C) over various wear & durability load cycle configurations (ISO 18192-1 & ASTM F2346-05 standards).  The analysis output provided details of the fatigue life of the device and identified regions of potential failure under extreme load conditions. This data was correlated  to the physical tests.

 Input:  ISO & ASTM Standard Load Cycles | Fatigue Properties (S-N Curves, High Cycle Fatigue & Low Cycle Fatigue) | Contact | Coefficient of Friction | Hyper-elastic Material Response

 Outputs: Fatigue | Cycles to Failure | Contact Micro-motion | Potential Early Failure Regions | Wear