post-application grades?! (grades from senior year)

Hey whats up guys?! Quick question..what do dental schools do about your senior year grades? I applied in july and had my transcripts sent it until this past summer, but do dental schools ask to see your grades from senior year? If so, what do they look for? Honestly, my grades have been droppin down to B's and I dont think it's going to effect my gpa much. But I was just curious as to what dental schools do for this.

And if they do look at them, would they not accept you once they saw that you went from all A's to all B's? Any thoughts would be greatly apreciated.
thanks guys!