I don’t take physics but I take maths and know a lot of people who take sciences.
Most people who take sciences either take chemistry and biology together or physics and chemistry, they seem to be very distinct groups from what I can tell, and I don’t know anyone who does all three sciences.
There is a lot of physics involved in maths (the mechanics side of the course covers Newton’s laws and kinematics etc) so if you are interested in both, both would be covered in maths.
Also, I think maths relates a lot to chemistry, so I would recommend maths over physics. If you are studying dentistry I don’t think physics would have very much to do with it, whereas maths seems to complement most subjects, especially sciences 😊