What Do You Know About PEEK (Polyetheretherketone) As a Facial Implant Material.

I understand it's a relatviely new material & used for custom implants occasionally. I'm looking for information on it, & how it compares to porex or silicone, why use it? Does it integrate with tissues like porex? Do it cause the formation of scar tissue? Is it more or less resistant to infection than other materials? Is it easier or more diffcult to remove than other materials? Does it feel more like bone than other materials? The above questions is the type of info I'm looking for. Thanks