What is the best management for my teeth after they have been shifted due to a crown which was too big? (Photos)

After my dentist performed a root canal (1st molar, top left), he left me with a crown which was way too big; causing my teeth to sit in a funny place. After a month of trying to get my teeth settled, I went to a new dentist who simply ground away the excess crown... Now I'm finding my teeth want to sit in their original placement but they have been shifted downwards on my left side causing clashing and an uneven bite. I have had braces before so my teeth are still quite straight.

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