High GPA and DAT; No acceptance?

I guess it might sound strange but this has been on my mind. I came here to see if anyone can help explain it. My sister applied to dental school a few years ago with a 3.9 GPA and I don’t remember the exact score of her DAT but it was in the 99th percentile. She was also involved in many activities at college. She even did a program where she went around to local elementary schools and taught students about oral hygiene. I’m obviously biased and don’t know much about dental school... High GPA and DAT; No acceptance?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums