What is a free gingival graft?

A small piece of the surface of the palate, epithelium and all, moved to a spot where the gum is too thin or has run out entirely. It is called free because the tissue is completely detached from its original blood supply before it is placed, and gingival because what it builds is gum rather than root coverage. Sullivan and Atkins set out the principles in 1968 , and the operation performed today is still the one they described.

Is a free gingival graft the same as a connective tissue graft?

No, and they are not interchangeable. A connective tissue graft takes tissue from under the surface of the palate and tucks it beneath the gum that is already there, which is why it blends in and why it is the more predictable way to cover an exposed root. A free gingival graft brings its own surface with it and sits on top, which is why it builds a thicker, tougher band but can heal a shade lighter. See the two compared side by side .

Does the palate hurt afterward?

This is the part most patients notice. Because the graft takes the surface layer with it, the donor site is left as an open wound that heals from the base upward over about two to three weeks, with the first week being the tender one. Most people describe it as a pizza burn. A dressing goes over it, and a connective tissue graft or processed donor tissue avoids it altogether where the case allows.

Will it match the rest of my gum?

Often not exactly. The graft brings its own epithelium from the palate, and palate tissue tends to be paler and firmer than the gum beside it, so a grafted band can read as a lighter patch. This is one reason it is usually placed low on a lower front tooth or somewhere a lip covers, and one reason a connective tissue graft is preferred where appearance is the main concern.

How long does it last?

In a retrospective study by Agudio and colleagues following 103 patients and 224 grafted sites for ten to twenty-five years , the band of keratinized tissue widened by 4.2 mm in the first year and had given back only 0.7 mm of that by the end of follow-up, while pocket depths stayed stable. Results in any individual case vary with the cause, the site and home care.

Free Gingival Graft: What It Is and When It Is Needed

In the Austin area? Dr. Verrett provides this care in North Austin. See Gum Recession and Gum Grafting, or request a consult.

Patients are sent for a free gingival graft far less often than for the other kind, and the reason the two get confused is that both take tissue from the roof of the mouth. They solve different problems. A connective tissue graft is the operation for a root that is showing. A free gingival graft is the operation for a tooth that has run out of firm gum altogether, which is a different situation with a different consequence if it is left alone.

What the Operation Actually Is

A thin piece of the surface of the palate is removed, including the outer layer, and placed on a bed prepared at the recipient site. The graft arrives with no blood supply of its own, which is where the word free comes from, and survives its first days by absorbing fluid from the bed underneath before new vessels grow into it. Sullivan and Atkins described the principles of free autogenous gingival grafting in 1968, and the operation has changed remarkably little since.

What makes it different from the alternative is that it brings its own surface. A connective tissue graft is slid underneath the gum that is already in place, so the patient’s own tissue covers it and the colour match takes care of itself. A free gingival graft sits exposed, and it keeps the character of the palate it came from: thicker, firmer, and usually paler.

What It Is For, and What It Is Not For

The purpose is to build a band of keratinized, attached tissue where there is not one. Attached gum is bound down to the bone underneath; it does not move when the lip moves. The alternative tissue, the loose lining that runs up into the cheek, moves constantly, tears more easily under a toothbrush, and gives a tooth nothing stable to sit in.

It is not the operation for covering an exposed root. That matters because patients often arrive having read about gum grafting generally and expecting their root to be covered. In the systematic review Chambrone and Tatakis prepared for the American Academy of Periodontology Regeneration Workshop, built from 234 included studies, connective tissue graft procedures produced the highest percentages of both mean and complete root coverage. If the complaint is a long-looking tooth, that is the operation being discussed.

Does Everyone Need a Band of Attached Gum?

This is the honest part, and it is worth setting out because the answer changed.

The older position came from Lang and Löe in 1972, who examined the relationship between the width of keratinized gingiva and gingival health and reported inflammation at surfaces with less than about two millimetres of it, even where the tooth surfaces were being kept free of plaque. For years after that, two millimetres was treated as a threshold, and grafting to reach it was routine.

Later work complicated that. Wennström published a five-year longitudinal study in 1987 under the title Lack of association between width of attached gingiva and development of soft tissue recession, and the finding was what the title says: sites with little or no attached gingiva did not reliably go on to recede. The modern reading is that a narrow band is not by itself a reason to operate. What matters is whether the site is actually deteriorating, whether it can be kept clean, and what is about to be done to it.

So the question at a consultation is not how many millimetres are there. It is whether this particular tooth, in this particular mouth, is losing ground.

When It Is the Right Choice

Dr. Verrett recommends a free gingival graft in a fairly narrow set of circumstances:

A tooth with no attached gum that is visibly getting worse. Recession documented as progressing, rather than a single measurement taken once.
Lower front teeth with thin tissue. The commonest site by a distance. There is little tissue to begin with, the bone over the root is thin, and a toothbrush reaches it at an awkward angle.
A frenum pulling on a gumline that has nothing to resist it. Often addressed together with a frenectomy, since releasing the pull without building tissue frequently leaves the problem half solved.
Before orthodontic movement that will push a tooth outward. A tooth moved beyond the bone that houses it, with no firm gum over it, is a predictable problem. Building the tissue first is easier than repairing it afterward.
Where a restoration margin will sit at or below the gumline. A crown edge against mobile lining tissue is a long-term irritation.

What the Long View Shows

The most useful evidence on durability is a retrospective study by Agudio and colleagues, who followed 103 patients and 224 grafted sites for between ten and twenty-five years. Every site had been completely lacking attached gingiva, with recession, before treatment.

Three findings are worth knowing:

The band held. Keratinized tissue widened by 4.2 mm in the first year, and over the following decades gave back only 0.7 mm of that.
The gumline moved the right way. The margin shifted 0.8 mm coronally — up the crown, covering more root — in the first year, and a further 0.6 mm across the remaining follow-up. Tissue creeping back over a root years after the surgery is a recognised and welcome behaviour of these grafts, though it is not something to count on in any individual case.
Pocket depths stayed stable throughout.

That is an unusually long runway for any periodontal procedure, and it is the main argument for doing the operation on a site that genuinely needs it.

The Palate, Honestly

The donor site is the part patients remember. Because the surface layer is taken, the palate is left as an open wound that heals from the base upward over roughly two to three weeks, rather than being closed with sutures. The first week is the uncomfortable one, and most people describe it as a pizza burn rather than as pain. A dressing goes over the area, soft food is the rule for about a week, and hot and spicy things are worth avoiding for a few days longer than feels necessary.

A connective tissue graft takes tissue from beneath the surface and leaves the surface closed, which is why its donor site settles faster. Where several teeth are being treated at once, processed donor tissue can do the job without using the palate at all. Which of the three is appropriate is settled at the consultation and explained before anything is scheduled.

Recovery

Days 1 to 7. Soft, cool food. The palate is the tender part. Over-the-counter pain relief is generally enough. Do not brush the grafted area and do not lift the lip to inspect it.
Week 2. The site is checked and sutures are removed or have dissolved. The graft commonly looks pale and slightly swollen at this stage, which is normal rather than a sign of failure.
Weeks 3 to 8. Colour and contour settle. Gentle brushing resumes once the site has been checked. The palate is usually comfortable well before this point.
Beyond. The band continues to mature for several months, and as the Agudio follow-up shows, it can keep improving for considerably longer.

If You Have Been Offered One

Three questions are worth asking at any office, here or elsewhere:

Is this tooth measurably losing ground, or is this based on a single reading?
Is the goal a band of firm tissue, or root coverage? If the answer is root coverage, why this graft rather than a connective tissue graft?
Can the palate be avoided in my case, with donor tissue or a different technique?

The full picture on the other graft types, the tunnel technique and recovery week by week is on gum recession and gum grafting. If another office has already proposed a graft, a second opinion here is an examination, measurements and a written plan you can compare against the first. Request a consult in North Austin, or call (512) 346-6097.

Free Gingival Graft: Building Gum That Is Not There