Dentistry and dropping a subject

Starting next Monday I will be studying 4 As's. Maths,and all sciences(biology, chemistry and physics) however my school said I need to drop on of my subjects in a2. However my weakness I writing and spelling. I do get extra time for this. And I would really love to be a dentist (to be more exact an orthodontist) but can I do this without taking a2 biology? Or would It be best for me to drop physics and mathematics. My only problem is that physics is my favorite subject and I keep getting told that it would be the least needed in the field I would like to occupy.

it looks like you've not done research properly, you need A at A2 levels in bio and chemistry, otherwise no university will consider you at all!

I have been told by a Dental student in QMUL that they highly highly recommend me not to drop Chemistry or Biology. Out of their whole year only one person studying Dentistry has only dropped on of either Chemistry or Biology and that was Biology. Also they said that the first year would have been very hard had they have dropped Biology.

I want to drop Chemistry but am not sure if I should keep Physics. I am studying the exact same things, Maths, Chemistry, Biology and Physics and I have achieved 4 A's at AS levels.

I find biology the hardest, simply because of writing and reading I am going to the Leeds open day next weekend(Saturday 12th) i'll let you know if I get any more information. I hope it helps us both

Applying for dentistry at QMUL, King's, Dundee and Queen's Belfast.
GCSES 1A*, 4As, 5Bs
AS AABB (RS, Chemistry, Maths, Biology)
A2 predictions A*AA (RS, Chemistry, Maths)
UKCAT today.
EPQ on lung cancer, Grade A
Volunteering at Centre of the Cell, 2 weeks work exp at a care home, work exp at The royal london hospital in the anaesthetic dept. in November plus dental shadowing.

Any suggestions/comments? (sorry for spamming every dentistry thread possible)