Dental Visits During the COVID-19 Pandemic and Unmet Treatment Needs Among Schoolchildren in a Low-Income Area of Mexico City

The mouth is a window into overall health, yet for many children living in poverty, the path to a dentist's chair is blocked by more than just a locked door. It is blocked by fear, by a lack of money, and by the sudden, overwhelming disruption of a global crisis. When a pandemic strikes, the routine machinery of daily life grinds to a halt, and for families already struggling to make ends meet, non-urgent care is often the first thing to be cut. This is not just about missing a check-up; it is about the silent accumulation of pain and decay that goes untreated until it becomes an emergency. Understanding how a health crisis changes the way families seek care, and what happens to children's teeth in the aftermath, offers a stark look at the fragility of public health systems and the deep inequalities that persist even when the immediate danger has passed.

In a low-income neighborhood on the southeastern edge of Mexico City, researchers set out to measure the damage left behind by the COVID-19 pandemic on the oral health of schoolchildren. They focused on a community where unemployment is high, income is low, and access to basic services is often unreliable. The team wanted to know three specific things: how many children actually managed to see a dentist during the height of the pandemic, whether the severity of their tooth decay influenced their decision to visit, and what their dental needs looked like six months after the strictest restrictions were lifted. To find the answers, they gathered a group of 411 elementary school students, ranging in age from about seven to eleven years old. The researchers did not rely on guesswork; they conducted careful, hands-on examinations of every child's mouth, counting cavities, checking for gum inflammation, and looking for signs of early decay. At the same time, they asked the children's parents to fill out a questionnaire about whether their child had visited a dentist in the previous year, a period that overlapped significantly with the pandemic's most restrictive phases in the city.

The results painted a picture of a system that had largely stopped working for the most vulnerable. Only a small fraction of the children, roughly 17 out of every 100, had managed to see a dentist during that difficult year. For the vast majority, the dental chair remained empty. When the few children who did visit were asked why they had gone, the answers were almost entirely driven by pain. Nearly half of those visits were prompted by an abscess or severe toothache, and another third were for existing cavities that had finally become too painful to ignore. Very few visits were for routine check-ups or preventive care. This pattern suggests that for these families, dental care had shifted from a proactive habit to a reactive emergency response. The fear of infection, combined with the economic strain of the pandemic, likely kept families away until the pain became unbearable.

The study also revealed a striking difference in how parents viewed their children's baby teeth versus their adult teeth. The researchers found that children were significantly more likely to be taken to the dentist if they had severe decay in their permanent teeth, the ones they would keep for the rest of their lives. However, even when children had extensive, painful cavities in their baby teeth, it did not significantly increase the likelihood of a dental visit. This points to a common misconception among parents that baby teeth are temporary and therefore less important to treat. The data showed that more than a third of the children had severe decay in their baby teeth, yet this suffering did not translate into action. In contrast, the presence of severe decay in the permanent teeth acted as a stronger trigger for seeking help, suggesting that parents perceive damage to adult teeth as a more serious, long-term threat.

Despite the lifting of restrictions and the return to normal school schedules, the need for dental care remained overwhelming. Six months after the pandemic's peak, the researchers found that nearly all the children had unmet treatment needs. In the permanent teeth, almost 96 percent of the children required restorative work, such as fillings, to fix cavities that had grown too large to heal on their own. In the baby teeth, the need was also high, with over 84 percent requiring treatment. Furthermore, the study highlighted that oral hygiene had suffered; a significant portion of the children had poor plaque control and bleeding gums, signs that the daily routine of brushing and flossing had been disrupted or neglected during the crisis. The researchers noted that older children were slightly more likely to have visited a dentist than younger ones, perhaps because they were more vocal about their pain or because their permanent teeth were more visible and concerning to their parents.

The story emerging from this low-income corner of Mexico City is one of resilience tested by a perfect storm of barriers. The pandemic did not create new problems so much as it exposed and deepened existing cracks in the system. The fear of the virus, the loss of income, and the closure of schools created a perfect storm that kept children away from care until it was too late. The findings suggest that simply reopening clinics is not enough; the gap between the need for care and the actual receipt of care remains wide. The study concludes that to protect children's health during future crises, systems must be designed to reach those who are most vulnerable, ensuring that access to care is not dependent on the presence of pain or the ability to pay. The data serves as a quiet but urgent reminder that for these children, the pandemic's shadow still lingers in their mouths, waiting to be addressed.