It's mild form of Rickets
and it's called vit. D deficiency Rickets. It has no connection with your chicken pox. Vit. D deficiency rickets is very common condition in Indians and mostly it's due to low Vit. D level in mother. Bony changes are reversible and you will see it as baby grows. Do monthly x rays of baby after consulting with doctor and you will see x ray
changes over period of month.