Why treat decay in baby teeth if they will fall out?
Baby teeth support chewing and preserve space for permanent teeth. Decay can cause pain, infection or early tooth loss, so it needs assessment even though the tooth will eventually fall out.
Details
Is the permanent tooth always affected?
Not every cavity in a baby tooth damages its successor. However, infection or premature tooth loss can create problems. Nearby teeth may shift into the gap; a dentist assesses whether a space maintainer is needed based on the tooth and eruption timing.
Choosing treatment
The decision depends on decay depth, symptoms, restorability and the tooth’s stage of development. Do not wait for severe pain before arranging assessment. Pain with swelling or fever warrants prompt dental contact.
Related question: When should I start brushing my child’s teeth, and how much toothpaste should I use?.