Little Dayton Sherwin is your typical rough and tumble 6-year-old who ends up with the odd bruise and scrape when he goes outside to play.
So when his mum Jordan cleaned his teeth last November she wasn't too surprised to discover he had somehow chipped a back tooth.
She immediately made an appointment at the Pukekohe school dental service, and a filling was put over the damaged tooth.
Today his mum is ruing that decision after a sleepless night wondering if her little boy has contracted a blood-borne disease through contaminated dental equipment.
"I had to tell him this morning that we needed to go to the doctors first thing. It's hard to explain it to a 6-year-old so I said he might get sick and he needed a blood test.