Youngest DenturesIn a culture where most magazine covers celebrate pearly-white smiles and movie star grins, leave it to Guinness to commemorate a lack of dental hygiene. While most three year-olds are still growing their baby teeth, Daniel Sanchez-Ruiz of the UK is the youngest person to ever be issued a full set of dentures. At a mere age of 3 years and 301 days, he was acknowledged for his oral achievements in February of 2005.