Hey there,
If anyone is looking for an English speaking, or at least fairly good speaking, dentist, there is a place near Juliana's you should go. It's called More Cheegwa. It is actually a large building with a number of floors. There are several dentist there. The phone number is 721-2875 or 724-2870 for the second floor. I think the second floor is where you need to go. From Julianas head towards the Castle Night Club or Elvis. When you get to the street that runs parallel to the main road which leads out to Yeosu, you'll find the dentist on the corner across from the golf Driving Range. Go to the second floor.
Cheers
Chris