What is causing my bottom right lip to go down and my top left lip to up when I speak?

I do have gum atrophy and missing teeth (back right bottom) plus there is bone loss. I had minor office gum surgery and my bridge placed back but it did not touch my gums. Financially I was unable to repair -it's been 13 years - now I've notice my right side of face droopy and when I speak sometimes my lips go in different directions.

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