Hey Steve,
This is really interesting. First I think it's weird how the upper left 3,4,5 have not really developed or had any root development between the two time points. Because of this, I would wait a little more before extracting the primary teeth. Maybe they are just super slow to develop or maybe there is something else? Either way, I think we would expect to see some more root development in 10-11 months of treatment. I'm curious to see what everyone else thinks of this.
When looking at the panos I think some of the problem is due to the UL2 which is misshapen and looks ankylosed. It looks like the alveolar ridge on the left goes up mostly around the UL2. So, perhaps try to see if that tooth is ankylosed first by having it exposed and luxated and try to bring it in. If it doesn't move then think about extraction or surgical repositioning. In the meanwhile hopefully the canine and premolar roots will develop and and you can have the primary teeth extracted or re-eval what to do about the delayed development.
Let's see what everyone else says! Cool case! I've never seen so many teeth delayed like this.
Hemali
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