I've been in a very similar boat a few times now & we are health food freaks, DD didn't have ANY sweets until 2 & 1/2, even now rarely drinks sugary drinks, eats sweets etc & has an exceptionally healthy diet, & we've always watered down juice
yet she had a tooth out at 2 - on my birthday - one I'll never forget that for sure :( - & she has had 3 more out since, all under general at the childrens hospital - though only one at a time, so a bit different to your situation
She has been fine every time & up & about & eating soft foods normally within a few days - at 7 & this time round at 9 she was back to school the next day, she wanted too, though I was on hand to pick her up if she couldn't cope - she coped fine
the hardest part was getting her to do the salt water rinses - a bit of a battle, but she did it after much cajoling, it healed quickly & she was able to eat normally after 3 days - her School friend, who had 7 out seemed to have a similar experience, though he was off School for 2 days - follow the hospitals advice on that & let them go back sooner if they seem ready
Our Dentist tells us that some kids just have weaker teeth & sadly DD is one of them, we've friends whose kids eat sweets day in & day out, all 3 of them, & none have ever needed a filling or tooth out
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I've a good friend who works in alternative medicine, specialising in babies & children & she reckons that Mums who are under stress during pregnancy tend to have kids with weak teeth enamel - fits me as I was working in a very full on career, moving cities & much more at the time & it also fits the other MMum I know in RL whose DCs have had the same problem, so interesting
Good luck, it will be over before you know it, just stock up on pain killers, kiddie ibruprophen & a small heat pad, DD found that very soothing to hold to her face
XX