I came home and googled the goo, only to find that there has never been real study of its effectiveness in gums. There have been studies of its effectiveness as an antibiotic when swallowed or injected, but no studies of its use in gums.
The largest-scale studies have shown that physical therapy doesn't help at all, like this from the New England Journal of Medicine:
http://content.nejm.org/cgi/content/short/339/15/1021And yet, when I see "skeptics" rail against "quackery," they only seem concerned with the frou-frou side of medicine. "Skeptics" never seem to care one bit about non-evidence-based procedures unless the practitioners are wearing hippie shirts.
Where do you stand, HuckleB? Does it matter to you that dentists, like mine, make use of medicine that has no evidence for it? Does it matter that hospitals and doctors constantly refer patients to physical therapy, which has been proven ineffective?
Or are these procedures hunky-dory with you, because they don't burn incense?