LANAP: Laser Gum Surgery & a New Era in Periodontics

The periodontal disease does not warn with pain. Sometimes it just bleeds a little. However, it is the main cause of tooth loss in adults. Every year, thousands of teeth that could be saved are lost due to late diagnoses. The critical point is that the damage occurs silently: when the patient arrives, the bone has already changed.

The periodontitis has been, for decades, a problem treated with methods that sacrificed healthy tissue to control damage. Today, that logic is beginning to be reversed. With laser-assisted surgery –LANAP– The intervention stops being an open battle against the gum and becomes a precise, selective therapy with the capacity for regeneration. What once involved scalpels, sutures, and prolonged discomfort can now be resolved through a light energy-guided protocol that preserves what matters and removes only what is necessary.

Many patients comment that “brushing bleeds a little,” or that they feel “a bad taste in the morning.” Others notice that some teeth “move barely, but it doesn’t hurt.” They also appear halitosis persistent, receding gums, or the sensation that the bite has changed. It’s all part of the same picture: periodontal disease.

It’s not about dirt. It is a chronic immunological reaction against specific bacteria lodged between the gum and the tooth root. It has a genetic component that defines who develops it and how aggressive it will be. The consequence is always the same: bone loss, tooth loosening and, if it progresses, permanent loss of teeth.

In Uruguay the diagnosis is usually delayed. Many patients spend years receiving cleanings that relieve, but do not stop, the destruction of dental support. That it doesn’t hurt is part of the problem: it progresses without giving strong signals.

For decades, advanced periodontitis was treated by lifting the gum with a scalpel to scrape and smooth the root, thoroughly clean, and resuture. It works, but it is invasive and can leave aesthetic consequences that are difficult to reverse.

LANAP – for its acronym in English, Laser Assisted New Attachment Procedure – changes that approach for a specific reason that is very understandable for any patient: it does not hurt.

Not during the procedure, not the next day, not three days later. No inflammation appears and there is no postoperative Typical trauma of periodontal surgeries.

The laser acts on the diseased tissue without cutting the gum and without damaging the healthy tissue. The result is a clean, sterilized, closed bed capable of biologically re-uniting with the tooth root.

Histological studies carried out in the United States showed real regeneration: new bone, new root cementum and new periodontal ligament in cases treated with LANAP. Clinical series of more than six years describe stability and less tissue loss than with traditional surgeries.

In March 2025, the Journal of Periodontology published a comparative analysis between conventional surgery and LANAP. The laser protocol achieved better bacterial reduction, less postoperative inflammation and older periodontal stability at 12 months. It’s not a miracle: it’s technique, physics and rigorous execution.

The crucial point is that LANAP does not simply seek to “clean up” the affected area. Its real objective is to modify the biological behavior of the tissue. The controlled heat of the laser stimulates the formation of a stable, dense clot, which functions as a matrix for the fibers to re-adhere to the tooth. That adhesion is what determines long-term stability. It is a documented tissue response, with results that surpass classical approaches when the case is well indicated.

Photodynamic Therapy (PDT) adds a step that enhances the result. A photosensitizer is applied – such as blue methylene– that enters the bends and root tubules where bacteria can hide. It is then activated with red light, which generates a photochemical reaction that destroys bacteria without generating resistance.

In clinic we use a dual diode laser of 810 + 980 nm for the surgical phase, and lengths of 808 nm (100-200 mW) and 660 nm for PDT. The logic is simple: one laser cleans and coagulates, the other eliminates hidden bacteria. This integration improves healing and long-term stability.

Photo: Freepik.

Classical surgical techniques were indispensable for decades. They responded to a time when regenerating was not possible. The laser allowed us to advance to a different model: minimal aggression, absence of pain, deep bacterial control and a real possibility of recovering structure instead of losing it.

LANAP is not a substitute for clinical judgment or the experience of the periodontist. But when evidence shows that it is possible to recover tissue instead of losing it, the paradigm moves. And what is at stake is not just the gum: it is your teeth and your bone. Periodontics is entering a different stage, more conservative and more precise, where preserving is worth more than cutting.