can i get into dentistry or oral health?

i want to do dentistry or oral health and work my way up to dentistry, fortunately i done well in well in my gcses but my maths grade unfortunately wasn't enough to do bio or chem. currently i am doing wjec medical science, history and sociology and i am retaking maths to hopefully get to do chem but results come in January. i feel lost and want abit of closure to see if its likely if i can do either in uni. i dont want to relocate and i want to stay in London for uni. As well as that i found out unis dont/ wont really count medical science to help me in my case. i am confused as i thought it would help a little if i get into chemistry,
Please let me know if anyone has had a similar situation and got into them or can give me advice.