Grey Baby Tooth. Most kids have brilliantly white teeth. You do not replace the baby tooth.
Follow a good oral care routine for your toddler and teach your kid to brush and floss from an early age to avoid early onset of tooth decay. The dentin inside the tooth is what gives the tooth its color and it is living so if the tooth is grey the dentin has had its blood supply compromised and so wont revert to white. If the discoloration is caused by poor dental hygiene more thorough brushing might help.
When a tooth turns gray after a trauma or dental treatment like a root canal treatment it usually doesnt mean much other than the tooth being a different color.
You do not replace the baby tooth. Causes of Discolored Gray Baby Teeth Yellow or Brown Stains on Toddler Teeth More Smile Reef. Medications traumatic injuries intra-canal medicaments and enamel defects may be responsible for causing yellow yellowish-green or yellowish-brown. This antibiotic can cause teeth to turn gray in children whose teeth arent fully developed.