My crown work, and colleagues root canal were done at:

http://www.thantakit.com/

We used the All Seasons branch, in the same complex at the Conrad Hotel in Wireless Rd. The firm paid all the bills, so can't help you there. My sense is that the crown was about THB 20,000, or around USD 550. This was for visits (investigation, removal tooth bits and apply temp cap, and fitting porcelain crown)

PS Good guess - costs here http://www.thantakit.com/dental-trea...-thailand.html