No, they are not approved here any longer. However, there are still thousands of people walking around with implants dating from years prior to 2015. Some seem to have no side effects, others are still discovering problems, and still others have been suffering for years without realizing the cause.
There is one instance in which metal alone may be used - resurfacing a femur head without placing a cup and liner in the acetabulum. This does not seem to have the danger of metal ions being released, because the metal is harder than the bone it contacts, so it doesn't break down like the metal to metal surface can.
Sue