Medical

Simulation is particularly suitable for simulating high-precision forging (near-net) for designing orthopedic implants (hips, knees, shoulders, ankles, dental implants, etc.) and  ancillaries that guarantee high-level physical and mechanical properties.

Moreover, you have a high performance predictive tool for simulating the entire forging range according to different processes: closed die forging, stamping, machining, heat treatment…

Identify the defects

• For the stamping of metal parts, the simulation makes it possible to detect all of the major defects.
• The user can directly locate the underfill areas and easily analyze the origin of cold-shuts.

Simulation can also be used for biomedical applications and makes it possible to anticipate mechanical stresses during bone distractions.

Simulation is a tool to improve the performance of your medical devices (prostheses and orthopedic implants) made with investment casting process (lost-wax casting).

Investment casting for knee prostheses

Master the quality of your cast part

• For implants made through investment casting, control the evolution of the molded parts solidification and avoid risks of shrinkage or porosity.
• Simulate the entire casting cluster with precision by taking into account the effects of self-radiation.

By carrying out studies on the service life of medical devices (implants, prostheses, etc.), numerical simulation also makes it possible to improve the service life of your MDs (stents) by simulating their behavior in use.

Study of the dynamic behavior of a self-expanding stent according to the artery pressure cycle - FORGE® simulation.

Validate in-use stability

• In the upstream phase of your projects, test the various designs and check the behavior of your parts in conditions of intensive use.
• Reliable answers for the service life of parts as well as for predicting metallurgical changes.

Numerical modeling can significantly contribute to innovation in the medical sector as it can serve different types of biomedical applications.

One example is Distraction OsteoGenesis (DOG). This is a surgical procedure that was mainly used in the field of orthopedics to reconstruct a deformed skeleton or to lengthen the bones of the body, especially the lower limbs.

This technique can be used for maxillofacial surgery. The advantage of DOG is that it can simultaneously increase bone length and the volume of surrounding soft tissues.

Original condition of the jaw with 2 incisors to be treated

These studies were conducted for Dr. Charles Savoldelli, (Maxillofacial surgeon in Nice) with a research version of FORGE® by CEMEF. The study took into account the interactions between bones, the cartilage layer and soft tissues.

Implementation of the finite elements model (source Yannick Tillier, CEMEF)

Studying the interactions between bones, the cartilage layer and soft tissues

Characterization of biological materials

• Complex materials (heterogeneous, anisotropic, etc.)
• Environmentally sensitive materials
• Use of specific characterization equipment
• Use of reverse analysis for parameter identification

Numerical modeling

• Implementation of a hyper-elastic solver
• Complex geometry management
• Medical device design assistance (breast implants, heart valves, cochlear implants)
• Development of assisted surgery (gynecology, ophthalmology, maxillofacial)

Nature of results

• Stress distribution in the articular disks according to mouth opening
• Integration of patient asymmetry
• Impact of mechanical conditions and friction conditions applied between bones and/or tissues

Demonstration deformable multi-body calculus