Blue Sky Bio have created a very nice overview of dental surgical guide creation for implants using their excellent Blue Sky Plan software. This software is free to use with a charge for export, this is an excellent business model giving users access to learn and experiment with the software without a huge upfront cost.
Check out the guide here http://www.blueskyplan.com/stepbystep
Robox is the most popular FFF/FDM 3D printer in dentistry. We think this is because it is the easiest to use. Dental professionals are very skilled with their hands and can visualise and create very accurate and detailed objects. They are also very busy with valuable time. Being able to work through cases quickly and simply send them to the printer without fiddling or dealing with nasty resins makes the whole process clean, fast and predictable.
Robox is the best 3D printer for dental surgical guides because it is very easy to set up and use, Robox is clean and compact with safe and very cost effective consumable materials. Best of all it has dedicated and knowledgable support staff who are ready and able to help along with the best warranty of any 3D printer.
There is a comparison of SLA vs FDM here.