hi Daniela
to make sure you tell K.Tonngpiht to take time for the treatment of tooth if it takes all day, you can come back to write leave record on backwards. If possible, do not forget to ask for a medical certificate. Hopefully it will get well soon
about your plan to go to Cambodia
For overseas travel during this time, you can do it.
But don't' forgotten when you plan for their trip.
Every time, it is important that you will need to make a Re-entry permit.
During this 90-day visa, I suggest that you have Allow plenty of time of time before check-in at the airport to applied for Single Re-entry.So it does not affect your visa. And i will make for Multiple Re-entry after we extending one year visa.