I dont understand with conditions like this why they woudlnt want to remove all the teeth in one go, cats cope really well with no teeth, and it is much better for them than going through 2+ dentals and anaesthetics (I had that with Ginger, he ended up with 3 dentals cos they would only take out a few, and they wnated to leave 2 in on his last dental, so I kicked off, he was 13 by that point and overweight, I didn't want him going back in another years time).