For mothers on here who say their children have terrible teeth due to medical issues, that is incredibly rare in the general preschooler population.
Maybe you should check the facts before you post?
Weakened enamel is the most common genetic dental issue and affects around 1 in 18 people.
Worldwide, hypomineralisation affects around 1 in 6 children.
Around 4% are affected by hypoplasia.
Approximately 1 in 100 children are autistic which can cause brushing challenges and dietary issues. 2-5% have ADHD. In fact, around 1 in 7 people in the UK have some form of neurodiversity.
Antibiotics have been linked to issues with tooth enamel. I don't have figures on how many infants and preschoolers have used antibiotics but ear infections, chest infections, tonsillitis - all common infections in the general population and something children are likely to be treated for at some point. Around 10% of children will get a UTI before the age of five which, again, requires antibiotics. If the bacteria causing the infection is unusual or if it is a repeat UTI then the clinical process is to order testing to check kidney/bladder structure and function, prophylactic antibiotics are given during this process to prevent any further infections to protect a potentially vulnerable/damaged urinary tract and kidneys.