It's been about 4 months since my child's 2 permanent bottom front incisors (first 2 new teeth) has erupted but they are still only about 1/3 way out, very short compared to the adjacent baby incisors. is it still growing? is this normal?

Take child to a pediatric dentist for exam and x-rays. Sometimes other baby teeth can be blocking the full eruption of the permanent teeth .Normal eruption will occur if child is healthy and no trauma to that area.

The teeth appear to be normal from your description, especially if your child is about 5 1/2 to 6 years old. At this point you child should have been seen by a dentist for a number of exams and cleanings. If your child has not been seen as of this post, their first dental visit is way overdue.

Most common reason is space insufficiency. Standard of Care: American Dental Assn, American Academy of Pediatric Dentists, and American Assn of Orthodontics all recommend that ALL CHILDREN see a specialist Orthodontist at eruption of 1st permanent tooth, but not older than Age 7, for an Initial Orthodontic Evaluation (usually free). Orthodontists are dento-facial growth and development experts.