Is it possible for my gap to close using retainers after not wearing them for a month and half? (Photo)

I got my braces off in May of this year. I wore my retainers after that for about a month and a half, and stopped wearing them sometime in August, because me being my irresponsible self broke them. I slowly started to notice my two top front teeth separating and forming a gap. Can this gap still be closed using retainers again?? Or am I going to have to get braces again?

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