Hello, I had a chin implant inserted about 13 months ago. The doctor recommended a large size and so I had an 8 mm silicone winged implant. I have been able to 'wiggle' the implant up and down since ever and since it is unscrewed the implant seems to be pulled by gravity downwards especially when I look up. What causes this and is it common? Also, from the front it looks very boxy and masculine. How can I improve on this and get a feminine result?