A relapse after my orthognathic surgery or orthodontic treatement? (Photo)

I had III malocclusion of 12 mm. The movements were: upper jaw 4 mm fw and lower jaw 9-10 mm bw. 6 mnt after the sugery they take my braces off ,what is quite quickly I think. The picture with in my pink clothes was directly after the braces removing. A few months after that, I noticed changing of the positions of my teeth The other pictures are 1,5-2 years postop. The surgeon did an x-ray with isotope to check the growth activity but no grow activity was detected. Any suggestions? Thank you!

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