Good oral hygiene has long been recognized as an important part of childhood health, but new research suggests its benefits may extend far beyond preventing cavities. A large European study has found that severe dental problems during childhood could be linked to a significantly higher risk of developing heart disease later in life.
Researchers say the findings add to growing evidence that oral health and cardiovascular health are closely connected. While previous studies have established that poor dental health in adults can contribute to heart disease, this latest research focused on whether dental problems early in life could have lasting effects that persist well into adulthood.
The results indicate that children with severe tooth decay or ongoing gum disease may face a greater likelihood of developing cardiovascular conditions years later, emphasizing the importance of establishing healthy dental habits from an early age.
What the researchers discovered
The study, published in the International Journal of Cardiology in April 2026, analyzed health information from nearly 569,000 individuals in Denmark and the United Kingdom. Participants were followed for as long as 23 years, allowing researchers to examine how childhood oral health influenced future cardiovascular outcomes.
Investigators compared childhood records of dental cavities and gingivitis with the later development of heart disease, heart attacks and strokes. Their analysis found a consistent relationship between poor oral health during childhood and an increased risk of cardiovascular disease as adults.
Children with the most severe dental issues were more likely to experience heart related conditions later in life than those with healthier teeth and gums.
Severe cavities showed the strongest connection
The researchers found that the severity of childhood dental problems appeared to play an important role.
Children with persistent or worsening cavities experienced a greater likelihood of developing cardiovascular disease as adults compared with those whose oral health remained stable. Gum disease also emerged as an important predictor, with higher gingivitis scores linked to elevated heart disease risk.
The findings suggest that both untreated tooth decay and chronic inflammation in the gums may contribute to long term health consequences.
The risk differed between females and males
Although poor oral health affected both sexes, the study found differences in the level of risk.
Females who experienced severe childhood dental disease had up to a 45% higher likelihood of developing the type of cardiovascular disease examined during the research. Among males, severe childhood cavities were associated with a 32% higher risk.
Researchers noted that additional studies are needed to better understand why these differences exist, but the overall trend remained consistent across both groups.
Scientists believe inflammation plays a role
Medical experts have increasingly recognized the relationship between oral health and heart health.
Inflamed gums can allow harmful bacteria to enter the bloodstream, potentially contributing to inflammation throughout the body. Chronic inflammation has long been associated with damage to blood vessels and a greater likelihood of cardiovascular disease.
The American Heart Association has also highlighted several biological pathways that may explain how periodontal disease influences heart health, including bacterial infections and persistent inflammation that affects the cardiovascular system.
Healthy habits often work together
Researchers also acknowledge that oral health is only one part of the overall picture.
Children who develop consistent brushing and flossing routines may also be more likely to adopt other healthy behaviors throughout life. Nutritious eating habits, regular physical activity and adequate sleep all contribute to cardiovascular wellness and may help explain part of the connection observed in the study.
Because these healthy behaviors often occur together, scientists continue investigating exactly how much each factor contributes to long term heart health.
Early dental care remains essential
The findings reinforce the importance of helping children establish strong oral hygiene habits from an early age.
Regular brushing with fluoride toothpaste, daily flossing when appropriate, routine dental checkups and limiting sugary foods and beverages all help reduce the risk of cavities and gum disease.
Parents and caregivers may face challenges encouraging consistent brushing, especially with younger children, but experts say these daily routines could support health benefits that extend well beyond childhood.
The researchers also emphasized that cavities remain common among school age children. Public health data show that many children between the ages of 6 and 9 develop at least one cavity, meaning parents should not view a single dental problem as a sign of failure.
Instead, experts encourage families to focus on prevention, early treatment and maintaining healthy habits over time. While additional research will continue exploring the relationship between childhood oral health and cardiovascular disease, this study adds to growing evidence that taking care of children’s teeth may contribute to protecting their overall health for years to come.
