Got the basic lab stuff back and I'm playing phone tag with the vet to follow up. Everything's normal other than glucose (obviously), fructosamine (high, but much lower than previously), and glucose in the urine. Precision PSL was normal. Everything's in the labs tab of Oberon's SS. I also emailed the other vet, because I realized I never got an actual copy of the September IGF results there, and I don't know if my regular vet has seen that test at all.
In his message the vet said that labs all look good for dental; the main concern would be if Oberon ends up needing a lot of extractions and has to be under for a long time. He mentioned that we might want to discuss going to a specialist. I've already looked up the three or four board certified dentists in the area, so I can ask if he has any experience with any of them and can recommend any in particular.
Still need to find out about the IGF test and TAMU GI panel. I mentioned them in my message when I called him back. The office closes soon, so maybe he'll return calls at the end of the day.