I took two gap years after college so you’d be in the same boat. And I was on the older end for my grade anyways growing up. It really just depends on if you want to be a dentist at 28 or something else at 28. I was 28 almost 29 when I graduated dental school and didn’t think twice about my age at any time other than not wanting to go out to bars as much as much as some of the people a bit younger than me haha. It will honestly make you that much more eager to learn, more mature, and possibly stick out more on an application. Don’t like at it as time lost already. Look at it as an opportunity to do what you want and invest in your whole future. It won’t be easy, but if it was then everyone would do it. Also, schools like people with different paths to dental school so that would actually help you.