On a recent MRI the Physicians that study the pictures were surprised and said they see a extremely bright areas that may be metal artifacts that has no explanation. This artifacts interfere with the MRI pictures reading.

E.G. came to receive Aliens treatment that gave results at least for several months. As part of the treatment the Aliens claim they implanted some parts in the Knee to support  weak bones areas. 

After several months E.G. undergo an MRI (Magnetic Resonance ) - similar to X-ray but much more accurate. The physicians were surprised to see some strange objects in his knee bones. As they put it: "Undefined metal artifact".

The aliens explained the artifacts are a area of the bone which were week and they added stronger protective material that is made from the same material and molecules as the natural bone but at a higher density of molecule spacing so to create a ceramic like extremely strong and durable material. The natural bone is in a way like sponge with many tiny holes in it.