Yeah, definitely don't apply to the three or so schools that don't accept any CC credits/pre-reqs. Fortunately, most of the top tier dental schools actually accept CC credits and having CC credits really isn't a hindrance when applying to dental schools. I think CC pre-reqs get a bad reputation when in reality they're a pretty ideal way to go... especially when done the traditional way of CC --> University --> DAT --> Applications.
If you avoid university level science classes all together then yeah, that can be a red flag... but nothing wrong with working your way from the bottom (CC) to the top (dental school).
I applied to 9 schools, the 6 higher tier schools were: Harvard, UCLA, Penn, UCSF, UoP, and USC
I didn't get interviews at Harvard (very few do) or UCSF but got accepted into UCLA, Penn, and USC. I turned down an interview for UoP. None of the schools I applied to seemed to have any issue with my CC credits... and I had a TON.