Toddlers in some parts of England are up to 120 times more likely to be admitted to hospital with rotten teeth than others, statistics show.
Government data reveals in Rotherham there are 1,143 hospital admissions because of tooth decay for every 100,000 children under the age of four.
In contrast, just nine admissions occur in Leicester for the same amount of youngsters, according to Public Health England figures.
It comes as part of a series of interactive maps that show the stark divide in health across each county and unitary authorities.
They also revealed infant mortality, low birth weights and childhood obesity are three times higher in certain parts of England than others.
Dentists have today blasted the statistics, which also showed a stark north/south divide in terms of the oral health of children.
Dr Richard Marques, of Wimpole Street Dental, told MailOnline that they are ‘very worrying’.
He added: ‘This suggests that there is an underlying inequality in dental health throughout the country.’
A spokesperson for the Oral Health Foundation echoed the concerns and branded the figures as ‘completely unacceptable’.
They told MailOnline: ‘Every single case of tooth decay is preventable.
‘With correct oral health education and an effective routine no child should suffer from tooth decay, no matter where they are in the country.
In England, 241 children under the age of four out of 100,000 will be admitted to hospital with dental caries, on average
‘There main and most dangerous cause of this is excessive sugar consumption.
‘Tooth decay is the number one reason for childhood hospital admissions in the UK and children consuming too much sugar and consuming it too often is the major cause of this.’
It is believed that Leicester operates in a different way to many unitary authorities and children are referred to community services and not hospitals.
In England, 241 children under the age of four out of 100,000 will be admitted to hospital with dental caries, on average.
While a quarter of children (24.8 per cent) across the country have at least one decayed tooth, missing or filled teeth.
But there are four times as many youngsters with rotten teeth in Blackburn with Darwen than there are in South Gloucestershire.
Some 56.1 per cent of children in the Lancashire district, according to the data. In contrast, the figure is just 14.1 per cent in South Gloucestershire.
The data, which is maintained by the National Child and Maternal Health Intelligence Network, also laid bare the staggering differences in infant mortality.
For every 1,000 babies born in Bracknell Forest – one of six authorities in Berkshire, 1.6 die before they turn one.
This is five times less than the figure in Stoke-on-Trent, where 7.9 babies don’t survive until their first birthday.
Child mortality rate – the amount of children who die before they turn 18 – also varies dramatically across different regions of England.
Luton topped the charts, with 22.4 children out of every 100,000 dying before they officially become an adult, on average.
Cornwall placed at the polar opposite end of the scale, with 6.2 children out of every 100,000 not surviving until their landmark 18th birthday.
In terms of low birth weight, 1.8 per cent of babies born in Wokingham weigh less than 5lbs 5oz, compared to nearly 6 per cent in the City of London.
One interactive map also provides a breakdown of how many children have been given the MMR vaccine across England.
It showed that just 69.8 per cent of two-year-olds have been given the jab in the London borough of Westminster.
In comparison, this is significantly lower than the 91.6 per cent of two-year-olds who have been immunised against measles, mumps and rubella in England.
Other data also confirmed the stark divide in childhood obesity across the country, with some regions having almost triple the rates of others.