A baby tooth usually stays in place until a permanent tooth underneath pushes it out and takes its place. Unfortunately, some children lose a baby tooth too soon. A tooth might be knocked out accidentally or removed because of dental disease. When a tooth is lost too early, your pediatric dentist may recommend a space maintainer to prevent future space loss and dental problems. If a baby tooth is lost too soon, the teeth beside it may tilt or drift into the empty space. Teeth in the other jaw may move up or down to fill the gap. When adjacent teeth shift into the empty space, they create a lack of space in the jaw for the permanent teeth. Therefore, permanent teeth are crowded and come in crooked. If left untreated, the condition may require extensive orthodontic treatment.