Sasori isn't controlling the 3rd the way that Chiyo controlled Sakura. The 3rd is dead. Sasori used his body to create a puppet, the way he said he did with the bodies in the last chapter. I'm sure that the body was mutilated and stitched back together. It probably has some mechanical parts to it as well.3. Sasori looks gay, I liked him much better before, and why does the so called kazakage have the mouth lines of other dolls? is he a doll (a machinary that was created in the image of the 3rd) or a controlled puppet? he didn't have those lines in the statue....
One thing that caught my interest was that this was the first time that I'm aware of that they gave any mention to the number of Kazekages. I found it interesting that in all likelihood Naruto's father is the 4th Hokage, while Gaara's father was the 4th Kazekage.
And as far as Chiyo is concerned, I've said it before and I'll say it again, because I have no doubt in my mind that Chiyo is going to sacrifice her lifeforce to revive Gaara. Its one of two purposes that old people serve in anime.