Peter Wood spends so much money fixing his teeth he reckons he probably pays for his dentist's annual holiday.
The retired primary school teacher grew up in Auckland in the 1950s, several years before fluoridation was introduced to the city.
He learned about fluoridated water when he moved to Thames about 35 years ago with his wife and three children.
Wood, 76, compares his unhealthy teeth to those of his children who were given fluoride tablets - and to those he taught, whose homes had a fluoridated water supply.
"They certainly don't have the monument to dental engineering that I have because I was pre-fluoride," Wood says.