What are the requirements for obtaining a DTV visa for dental treatment in Thailand?

Check your local Thai Embassy, they're the only ones who can help you as they'll be issuing the visa based on their criteria

I'm here now I looked into this,I picked a Muay Thai school in Chiang mai,400 usd almost guaranteed.and I get to do Muay Thai,heading to Vietnam sunday.was told Vietnam,Indo are the fastest easiest to get dtv

I queried this with an agent who told me it would be up to the dental surgery. I think that meant whether they take part in the process or not. My dental work would easy be more than 6 months due to the periods of time required for healing between each treatment, so I would suggest that if you can find a dentist that participates in the DTV and your treatment covers 6+ months you should be good to go.

*I havent started my process yet so take what I said as my own personal experience 👍

Where will you apply? As noted treatment plan covering 6 months is pretty solid grounds for the DTV.

Generally it's 6 months or more, but some with less have had luck.