Doctors used to pull teeth. For most of medical history the mouth was simply part of the patient, treated by the same hands that treated everything else. The divide came later, and it came from paperwork, not from biology. This publication documents where it came from and what the evidence actually shows.
When Parliament dissolved the Company of Barber-Surgeons in 1745 and split barbers from surgeons into separate professions, it drew a hard line between the two trades. Barbers could no longer practice surgery. Surgeons could no longer cut hair. The Act carved out exactly one procedure both sides were still permitted to perform: pulling teeth.
The mouth was the last common ground. It was not anyone's separate specialty. It was everybody's business, because a rotten tooth was understood as what it is, a body part that has gone septic.
This is not an argument about who is at fault. Nobody alive built this divide, and the clinicians working on both sides of it are the ones who most consistently work around it. It is an argument about a line that was drawn for administrative reasons, kept for administrative reasons, and never once ratified by the body it runs through.
The regulatory phrase by which Medicare has begun conceding, case category by case category, that the mouth is medical.
Read the brief → ClearanceWhy oral clearance precedes valve surgery, what an adequate clearance contains, and what the screening trials actually found.
Read the brief → ClearanceOsteoradionecrosis, MRONJ, and why cancer centers treat the mouth before the tumor.
Read the brief → CardiovascularThe association is real and replicated. The causation is not proven, and the AHA says so in its own words.
Read the brief → MetabolicBidirectional for thirty years. The Cochrane effect size on HbA1c is real, and smaller than you have been told.
Read the brief → SystemsThe cheapest intervention on the ward, the honest state of its evidence, and what its neglect reveals about how the system prices the mouth.
Read the brief →The clinical scenarios where dental care is medically necessary before medical treatment are documented, cited, and free to read. No gate, no sales call. Dental practices and physician teams each get their own side of the same standard.
1840 Baltimore, the 1926 Gies report that told medicine to take dentistry back, the 1965 statute that made the split federal law, and the body that never signed the paperwork.
Read the investigation → Field guideWhat the medically necessary lane actually is, why most practices never found it, and what doing it right requires.
Read the guide → RegistryDe-identified case entries showing what complete, accurate medical billing of a dental case looks like against what was actually collected.
Open the registry →