How does attenuating a genioplasty step-off work?

I'm having a sliding genioplasty reversed. One doctor said the notches would still remain and he would shave down the step-off to prevent any cosmetic effects in my jawline. How does this work? Are there any other ways to attenuate the step-off? I can also feel the metal hardware in my chin. It feels like a scew is popping up on one side. Is there a way to make sure the patient doesn't feel the metal hardware? I didn't feel this before, so does this mean my body is pushing out the metal?