Gum recession is one of the most common reasons patients are referred to a periodontist. You might notice it as sensitivity to cold, a tooth that looks longer than it used to, or an exposed yellowish root near the gumline. Left untreated, recession leads to root damage, decay in areas that were never meant to be exposed, and eventually — if the supporting tissue is lost entirely — tooth loss.
The encouraging news is that gum recession is very treatable. The key is understanding why it's happening, because the cause shapes the treatment.
The Most Common Causes of Gum Recession
1. Periodontal Disease
Bacterial infection in the tissue around the teeth is the leading cause of gum recession in adults. As the bacteria inflame and destroy the gum tissue and underlying bone, the gumline migrates downward. This type of recession typically affects multiple teeth and is accompanied by other signs of gum disease — bleeding, swelling, bone loss, and pocket formation.
2. Aggressive or Incorrect Brushing
Brushing too hard — or using a stiff-bristled toothbrush — physically abrades the gum tissue over years. This is called toothbrush abrasion, and it tends to affect isolated teeth (often on the side of the dominant hand) with a characteristic notched or worn pattern at the gumline. The gum tissue is worn away mechanically, not by bacteria.
3. Thin Gum Tissue (Thin Biotype)
Some people are born with naturally thin, delicate gum tissue — a characteristic called a "thin periodontal biotype." This tissue is more prone to recession from any mechanical or inflammatory trigger. It's not the patient's fault; it's anatomy. But it does mean that proactive treatment (gum grafting to thicken the tissue) is often appropriate before recession becomes more severe.
4. Misaligned Teeth or Bite Issues
Teeth that are positioned outside the normal arch — especially teeth that tip outward — often have very thin or absent bone on their outer surface. This makes the overlying gum tissue vulnerable to recession. Orthodontic movement can sometimes worsen recession in these situations if not carefully planned.
5. Tooth Grinding (Bruxism)
Chronic grinding generates lateral forces on the teeth that can damage the periodontal attachment over time, contributing to recession in some patients.
What Happens If You Leave It Untreated
Gum tissue that has receded does not grow back on its own. Once root surface is exposed, it stays exposed — and the recession typically progresses. Exposed roots are:
- Vulnerable to decay (root cementum is softer than enamel)
- Sensitive to temperature, sweets, and touch
- More prone to physical wear from brushing
- Aesthetically visible when smiling
Beyond the tooth itself, significant recession usually indicates loss of the underlying supporting bone — which is the real long-term threat to keeping the tooth.
How It's Treated: Gum Grafting
The most effective treatment for gum recession is a connective tissue graft (CTG) — the gold standard procedure for restoring receded gum tissue. In this procedure, a small amount of tissue is taken from the roof of the mouth and placed precisely over the exposed root surface, extending the gumline back to where it belongs.
The graft serves multiple purposes: it covers and protects the exposed root, thickens the gum tissue to resist future recession, and restores the natural contour and appearance of the gumline. In appropriate cases, complete root coverage is achievable — meaning the recession is effectively eliminated.
The procedure is performed under local anesthesia and takes approximately one hour. Recovery is manageable for most patients, with soft diet restrictions for about two weeks while the graft heals.
The Right Time to Treat Recession
Earlier is always better. Small areas of recession are easier to treat, require less donor tissue, and have higher rates of complete root coverage. If you notice that a tooth looks longer, feels sensitive at the gumline, or if you can see the root surface, that's the time to get an evaluation — not after waiting another year to see if it gets worse.
If the recession is due to periodontal disease, the underlying infection must be treated first — before grafting. If it's due to brushing technique, that habit must be corrected alongside the surgical correction.