Final answer:
The statement that tooth decay affects one-third of young children in the U.S. is false. Tooth decay is a condition caused by bacteria which, if untreated, can lead to more serious dental issues. Good dental hygiene and prompt treatment are essential for preventing dental caries.
Step-by-step explanation:
It is false that tooth decay affects one-third of young children in the U.S. While dental health is a significant concern, the prevalence of tooth decay can vary based on factors such as access to dental care, dietary habits, and dental hygiene practices. Tooth decay, technically referred to as dental caries, is caused by microbial lesions that damage the enamel and can lead to further decay in the dentin and pulp if untreated. Overgrowth of oral bacteria, particularly Streptococcus and Actinomyces species, leads to tooth decay, with plaque and acids eroding the tooth enamel. Timely treatments like fillings and root canals are essential to prevent the worsening of these caries, which underscores the importance of regular dental check-ups and proper oral hygiene.