first make sure you are going to glue the tooth back into the correct position, then see how visible the damage is. Before going nuts with sanding, i would mix up paint trying to get the tan-grey-brown-white-yellow color of the base of the tooth and apply it to the white chipped area. see how it looks. hopegully that will be close enough it will blend right in. Test the paint mixture on a scrap piece of paper before applying it to the statue, let it dry and hold it up next to the tooth . if it looks good glue it correctly back into place, and put this thing on your shelf and buy something nice like a ice cream sundae with your 25% refund.