There was no fluoride in the water, or fluoride toothpaste, when my generation were young - I'm sure these have made a big difference to younger people's teeth. People are also much more conscious of too much sugar. Flossing and the little interdental brushes weren't at all common either.
Mind you I'm sure some of it's down to genes. My mother's teeth were never brilliant at all and yet her younger sister - same upbringing, same diet etc. - had practically perfect teeth until she died in her mid 80s.
My mother finally lost nearly all of hers - which she'd been grimly hanging on to - but that was down to dementia, since she would no,longer brush her teeth or allow anyone else to, so the build up of plaque and consequent gum disease finished them off. However she was into her 90s by then and had advanced dementia, so was past caring.
Tommy Robinson arrested. Police using their existing powers
Six foot two, eyes of blue. kg v lb. cm v ft + ins