Ah, well I would not really worry. I believe those are completely separate things. I definitely do not think they will hold it over you --> so you would be entering the "normal" applicant cycle with a clean slate unless you want to talk about how you grew from the experience in your PS. A 3.9 GPA is really strong and if you keep it around there (and get a decent DAT score) you should not have to worry about not getting into dental school. (And you won't need to waste time on making a contingency plan).
Good luck! 🙂