An audience built from a treatment page is a list about health
Standard remarketing on a dental site groups people by the condition they were reading about, and that is not the same as grouping shoppers by product.
A retail remarketing list says somebody looked at a jacket. A dental remarketing list built the same way says somebody was reading about gum disease, tooth loss or sedation, which is information about their health.
Regulators have paid increasing attention to tracking technologies on healthcare websites and to what gets transmitted to advertising platforms. This is an active area rather than a settled one.
The practical consequence is that the tracking setup deserves a deliberate decision rather than a default installation. What is being collected, what is sent where, and whether procedure-level pages should feed audiences at all.
Safer configurations exist. Building audiences from general site visits rather than from specific condition pages, and keeping conversion tracking away from anything that identifies a person, are the usual starting points.
Have your own counsel review the arrangement, including any agreements with the platforms. The obligation sits with the practice, and this is the part of a dental account most likely to be wrong.