While most comprehensive policies offer dental coverage for acute, spontaneous pain or accidental emergency, they will not offer coverage for pre-existing dental conditions.
The best solution that we can recommend is the Careington Dental and Vision Savings Plan. This plan offers 5% to 60% savings on most dental procedures including routine oral exams, unlimited cleanings and major work such as dentures, root canals, and crowns. You can read more about this savings plan, here: http://www.visitorscoverage.com/careington-discount-plans/
To apply, please visit: Careington Dental and Vision Savings Plan Application