Yup, there were some PS work done on the teeth. Sharp eyes you guys have! The nerves on one of the teeth have died and it became greyish in colour, instead of the usual white tooth.
As to the so called sharp teeth, I take it to mean that the teeth are jagged. Well, kids are hyperactive and more often than not, there are knicks and knocks during the growing up stage. Guess that also explains why the tooth's nerve is dead.
Well, back to square one for my PS skills (and that include the skin tone). Will not do such a sloppy job in future. And thanks to all the comments. :embrass: