Qualifications in chemistry or biology are requirements for most universities, with physics and mathematics also viewed as relevant subjects. The expected grade standards for dentistry are generally higher than most subjects:
GCSEs Include: science subjects, mathematics, English language.
Also desirable: second language, social sciences.
A Levels Entry requirements range from BBB to AAA, with the universities and colleges most commonly asking for AAA in chemistry, biology, physics or mathematics
It’s best to check on the specific programme you’re interested in, as entry requirements can vary.