DS is autistic and when he was younger we struggled a lot with the sensory issues around toothbrushing. With a lot of trial and error we found a strawberry flavourd toothpaste he tolerates, and things got much better. The toothpaste is age 3-8, he's currently 8.5 and still hates anything minty. If I really have to switch to something else when he's 9, I'll start looking and gradually introduce it over the next few months, but do I really have to? The fluoride is 1450, which is the same as my adult toothpaste, so would it be OK for him to keep using it?
(or at least, would a calm thorough brushing with the wrong aged toothpaste be less bad then possibly missing bits while he fights me trying to use a right age one)