vaginal mesh erosion

What causes mesh erosion and why are so many women suffering from this? I had a surgery to correct vaginal and rectol prolasps....using the mesh. Also a sling was put on my urethra, now 6 months later, everything has to come out...I am schedualed this coming week for yet a third surgery. I have been told it will take up to 3 more surgerys to fix everything. After finding this site, I am shocked as to how many women are suffering the same thing. What is the cause of mesh erosion? Why does it come through the vaginal wall and possibly other areas.....I see where there are law suits pending against this mesh.....what's going on?

                                                                 Shelly