Dentistry - University of Leeds

Hi, for a levels I think I'm going to get like Bs and Cs and I was just wondering if I get Bs/Cs in my a levels, but resit and get predicted grades of like AAA or something like that would that affect my application to study at leeds, btw I'm elegible for a contextual offer so I need ABB to get in, would that make me a less favourable candidate as other people will be applying for dentistry and on their website they've stated that they accept resits but I was just curious to know, My gcse grades are not bad I got 987766666 and done loadsss of work experience and volunteering (over a year of volunteering at a charity shop, one year of volunteering at a hospital, one week of dentistry work eperience at guy's hospital, one week at a pharmacy and participated in so many sports and school activities) so my personal statement will also be good, and hopefully lets assume I do really well in my ucat about like 660+, would my application be affected overall due to the fact that I'll be resitting my a levels