I've had my braces on for 18 months. 1 tooth doesn't seem to move. Can anything be done to lower it down?

It moves so slow, I had a screw put in and it moved then, but not as much as it should have. My ortho took it off the screw, but the problem is I have a missing top tooth I want an implant for, but because the bottom 1 sits high Idk if I will like the look of the implant or if I can get one. Is there anything that can be done to lower it down? Perhaps I can try the screw again, but placed on the inside?

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