Metal-on-metal resurfacing arthroplasty: no way under the sun!--in the affirmative

I have been charged in this debate format to refute the idea suggested in the title. To do this, I will address 2 questions: (1) What problem does it solve? and (2) What risk does it pose? The answers to these questions will support my conclusion that metal-on-metal resurfacing arthroplasty is the wrong operation to be making a reappearance at this time.