To make it simpler, it's like there are three layers of teeth. But the ones we only see are just the line of teeth at the center. The ones in the second and third (canine) layers are still inside the gums and will have to erupt yet.
The dentist needed an xray before extracting one of his milk teeth; which was on the way of the permanent tooth. The baby tooth needs to be extracted coz the new tooth can't come out completely and it's a bit painful. Now the permanent tooth is getting out bit by bit and there's no more pain for him. Yey!
We've been to the dentist for cleaning and flouride but this was his first tooth extraction by a dentist. It means other teeth just fell off naturally or while playing. He was nervous on the way to the clinic, but he was brave until the procedure was done. Great job kuya Zach!
And here's the good news! Zach is exempted from taking his Final Tests in Computer and Robotics subjects. In his class, he's the only one who is exempted in Robotics. Hhmmm, I think that's another proof of where his interest lies.