S6 Subject choices

I am currently doing Higher human biology, chemistry, maths, English and Spanish. I know id like to do Advanced higher biology, chemistry and Higher Sports development. I've heard that Caritas is good while doing advanced highers but I want to study dentistry so I am not sure. Thank you

Yes, as I'm sure you'll know these subjects are fine for dentistry, just make sure you get minimum A's (maybe 1 B) at higher. Then B's at advanced higher and your higher to fulfill the conditional offer.
You'd also want to be looking for work experience in a dentists, as well as some sort of volunteering in somewhere like a care home.
Then you want to do well in the ucat this summer and write a half decent personal statement.
If you've done all these things to a high standard, you'll get an interview at a uni and then if you do well in that interview, you get a place in dentistry (if you fulfill your conditional offer which is usually just B's).
I know you'll already know most of this, just making sure as many think it is just school grades that get you in.
Best of luck, any questions and I'll do my best to answer them.