Recent figures have revealed that dental health among children is still improving.
The study, published by the NHS Dental Epidemiology Programme, revealed that the percentage of 12-year-old children affected by tooth decay has dropped from 37 per cent in 2001 to 33 per cent in 2009.
However, levels of decay were found to vary by region, with more children living in the north having some decay than those in the south.
Dr Nigel Carter, chief executive of the British Dental Health Foundation, said that the UK's "worryingly unhealthy food environment" is making it "even harder to improve the dietary habits of people, especially children".
He added: "Even though this latest study has shown improvements in children's oral health, there is more that can and should be done to tackle persistent inequalities, which continues to increase between spearhead and non-spearhead groups."
The doctor also noted that the research underlines the difficulties which parents experience "in today's society where sweets and sugary foods have been widely welcomed and accepted".