Tooth Decay | Cavities

Tooth Decay and Cavities in Children

Tooth decay is one of the most common childhood dental problems, and one of the most preventable. It happens when bacteria feed on sugars and produce acids that weaken enamel. At San Marcos Kids Dentistry, we help families prevent cavities and catch them early, before they cause pain. Call (760) 744-8600.

Tooth decay is one of the most common concerns we see in children, but it is also highly preventable. At San Marcos Kids Dentistry, our team helps families understand what causes cavities, how to prevent them, and how to recognize the early signs, so we can protect your child’s comfort, development, and long-term oral health. This page focuses on understanding and preventing decay. When a cavity does need to be fixed, you can read about our gentle fillings and crowns.

What Causes Tooth Decay in Young Children?

Early childhood decay, sometimes called baby bottle decay, often begins when a child falls asleep with a bottle of milk, formula, or juice. When sugary liquids sit on the teeth, bacteria feed on the sugars and create acids that weaken enamel. Over time, that can lead to cavities, pain, or infection. The encouraging news is that simple daily habits make a big difference.

How to Prevent Cavities and Baby Bottle Decay

Prevention starts early, even before your child has a full set of teeth. A few habits go a long way:

• Skip bedtime bottles with milk, formula, or juice, and offer water instead
• Limit juice in bottles or sippy cups to mealtimes only
• Encourage drinking from a cup early in the day
• Never dip pacifiers in honey or sugar
• Begin gentle brushing as soon as the first tooth appears
• Use fluoride toothpaste: a grain-of-rice amount under age two, and a pea-sized amount twice daily once your child can reliably spit
• Help your child brush until they can do it well on their own, usually around ages seven to eight

Regular cleanings and checkups plus fluoride and sealants add another strong layer of protection.

Why Cavities in Baby Teeth Still Matter

Even though baby teeth eventually fall out, cavities should never be ignored. Many baby teeth stay in place until around ages eleven or twelve, and untreated decay can cause pain, infection, and trouble eating or sleeping. Baby teeth also guide proper development, so if one is lost too early to decay, neighboring teeth can drift into the space and crowd the permanent teeth coming in. We focus on prevention first, and when treatment is needed, we recommend only what is necessary.

How to Tell If Your Child Has a Cavity

Cavities are not always painful at first. Early signs may include white spots, dark areas on a tooth, or sensitivity to hot, cold, or sweet foods. Because early decay is often invisible to parents, regular dental checkups are the best way to catch it before discomfort develops. If we find decay very early, options like silver diamine fluoride can sometimes stop it without a drill, while more advanced decay may need a filling, a crown, or, if it reaches the nerve, a pulpotomy.

Schedule a Checkup in San Marcos

The best time to deal with a cavity is before it starts, or as early as possible. Call San Marcos Kids Dentistry at (760) 744-8600 or request an appointment online. Find our hours and directions on our San Marcos office page.