You can't staff when the reimbursements drop. That is what is happening now. The same is happening with prescription drugs. So what has been experienced in the past is getting worse, and will continue to get worse.
Dental care is totally different! Most people have very little dental insurance and dentists tend to deal with more cash patients! Here in the Southwest many people have traveled to Mexico for braces, dentures, root canals, etc. Some of them have came back with very bad infections, others have had great luck. This practice is less popular now that you need a passport, as it takes away from some of the cost savings.
If people from Canada can have their medical procedures at covered 100% in Canada, why would they be willing to pay cash to have it done someplace else? Could it be due to a waiting list? Could it be due to the long pre-approval process?