The Dentaid mobile dental unit visited Westborough High School to treat 111 children.
Some of them had not been in receipt of recent treatment.
Westborough pupils were given a pre-treatment assessment and a tooth strengthening fluoride varnish was applied.
Suzanne Baker, associate postgraduate dental dean, was pleased with Dentaid’s first experience of helping children in a secondary school. She said: “We had a great day and gained some valuable insights into service provision, as well as hopefully helping the pupils.
“We were very impressed with the behaviour and manners of the young people we treated.”