Patient door

A receding gum is a thin tent on a missing wall.

The pink edge has slid. The tooth looks longer. That is not a failure of brushing in isolation. It is a thin tent standing where bone no longer holds it up.

Pictures first. Then the names clinicians use. This is teaching, not a diagnosis of your mouth.

Educational and illustrative teaching models. Not a medical device. Not for diagnosis, treatment planning, or patient-specific simulation.

Why it happens

Thin gum, thin or missing bone

The tent and the wall
Gum is a tent. Bone under it is the wall. Thin gum on thin bone, or on a root that has already lost its plate, recedes when it is asked to take a scrape, a stretch, or an inflammation it cannot buffer.
Hard brushing is a scrape
A stiff brush on a thin margin is mechanical wear. Clean is not the same as grind. Plaque still matters. Inflammation thins the tent further.
A tooth pushed through the envelope
Orthodontics that move a root outside the bone envelope leave the gum standing on air. The recession is geometry arriving late, not a moral failure of hygiene.
After a clean, the swelling leaves
Inflamed gum is puffy. When the swelling goes, the margin looks lower. That can be oedema leaving, not a new disease overnight. A dentist still has to look.

What covering a root actually is

Asking a graft to live on a dead surface

A root has no blood vessels on the face you want to cover. The graft drinks from the sides for a few days. Then new vessels have to grow in. Pull the covering flap white and there is nothing to drink.

A graft lives on blood.

Covering a root is covering a dead surface. Pull the flap white and the graft has nothing to drink.

The black triangle is a missing pole.

Gum between teeth stands on a peak of bone. If the peak is gone, the triangle is geometry, not a failure of brushing.

The dense layer

First principles, written out

For clinicians, students, and anyone who wants the names. Not a surgical algorithm. Not a product pitch.

Cairo RT1

No interproximal attachment loss. The papilla is still there. Complete root coverage is the expected result if the surgery respects perfusion and tension. If you do not get it, the explanation is not “biology refused.” It is usually walls, phenotype, tension, or a flap that went white.

Cairo RT2

Interproximal loss is present, but not worse than the buccal. Partial coverage is the honest plan. You can thicken a face. You cannot pitch a tent above the pole you already measured. Selling complete fill here is optimism wearing a kit.

Cairo RT3

Interproximal loss is worse than buccal. The pole is gone. Do not sell complete coverage. The black triangle is geometry. Tarnow’s field constant still sits in the background: when the bone-to-contact distance is five millimetres or less the papilla is almost always there; at six and seven millimetres the probabilities fall off a cliff. Those are Tarnow et al., published. They are not a promise I am making to a named patient.

FGG, CTG, tunnel

A free gingival graft is a sheet on one nutrient face. It can widen keratinized tissue. The middle of a thick exposed graft is a diffusion problem — distance, then glucose. A connective-tissue graft under a flap is a sandwich: two faces, if both are actually perfused. A tunnel keeps lateral vessels by not cutting vertical releases. Same newton, different organ. I am not listing instruments.

Healing is three phases

Roughly. Day 0–3: plasmatic imbibition — the graft drinks from the sides. Day 2–11: revascularization — vessels inosculate and then work. Day 11–42: maturation. Longer if you asked the mucogingival junction to move. Colour in the first week is a perfusion report, not a personality trait of the graft.

Tension is perfusion

Blanching is edge pressure crossing capillary closing pressure. Teaching bands sit near 20 mmHg. Burkhardt and Lang (2010) put mechanical dehiscence around 0.15 N. Pini-Prato (2000) showed tension costs coverage. Colour and dehiscence are not the same event. Turn the knobs on simulate. The essay is a tight suture is a vascular event.

What this page is not

Not a diagnosis. Not a photo-status protocol. Not an Emdogain advertisement. Enamel matrix derivative is a field biologic: a gel that can signal and cannot hold vertical space alone. The chair still needs an examination. I work at Polyclinic Breyer in Sisak, and freelance. Write if this looks like a conversation.