Will it get you in, yes. Will it be helpful in dental school...probably not.
Here is my observation in D-school. The students that have a Bio related degree's study less and make better grades. They were exposed to this material before so its easier to pick up. I have a friend with a business degree and he studies a lot. He makes good grades, but man he really studies.
I have a Biology degree and already took bio-chem, anatomy, physiology, histology...etc so it comes easier to me and I have much more free time.
A good thing for you is that engineering is not an easy degree and adcoms know this...so that will be helpful
Best of luck to you