Case series: The use of laser assisted blood coagulation (LBC) in socket preservation without primary closure in implant dentistry

When a tooth is lost, the jawbone that once held it does not simply sit idle; it begins to shrink and reshape, much like a landscape eroding after a river changes course. This natural process, known as bone resorption, can make it difficult to place a dental implant later, as there may not be enough solid foundation to support the new artificial root. To prevent this, dentists often perform a procedure called socket preservation, where they fill the empty hole with bone graft material immediately after extraction. However, this delicate work faces a constant threat: the body's natural tendency to reject foreign materials or fail to cover them with healthy gum tissue. If the graft is exposed to the air or the mouth's bacteria before it heals, the treatment can fail, leaving the patient with a compromised jaw and a failed implant. The goal is always to create a stable, sealed environment where new bone can grow undisturbed, but achieving this without stitching the gum tightly shut has long been a challenge.

In a case series spanning twenty years, a researcher at the University of Hong Kong explored a different approach to this problem using a specific type of laser. Instead of relying solely on sutures to close the wound, the team used an 810-nanometer diode laser to assist in the formation of a blood clot. The process began by encouraging bleeding in the extraction socket, either naturally or by gently stimulating the tissue. For some cases, a different laser was used to decontaminate the area before the main procedure. The 810nm laser was then directed into the socket with high power settings. Rather than burning the tissue, the light energy acted on the blood, causing it to coagulate rapidly and form a firm, jelly-like surface that sealed the opening. This technique, called laser-assisted blood coagulation, allowed the socket to heal without the need for primary closure, which is the medical term for stitching the gum flaps together tightly. The result was a stable environment where the blood clot acted as a natural bandage, protecting the bone graft underneath while the body did its work.

The study followed six different patients over two decades, documenting outcomes that ranged from immediate success to long-term stability. In one notable case involving a thirty-year-old man, a tooth was extracted and an implant was placed immediately alongside bone graft material. The laser was used to seal the site, and no stitches were applied. Six months later, a crown was attached to the implant. Even after the crown became loose three years later, the underlying implant remained solid, and a follow-up twenty-one years after the initial surgery showed that the bone level around the implant was excellent. In another instance, a patient with an exposed bone graft was treated by cleaning the area with a different laser and then applying the blood coagulation technique. Within six weeks, the gum tissue had matured and closed over the site, and fourteen years later, the implant remained stable with healthy bone levels. These patterns repeated across various cases, including older patients and those with complex gum issues, all showing that the laser-treated sockets healed predictably.

What makes this finding significant is the consistency of the results without the need for complex surgical closure. The researchers observed that the laser-treated clots formed a dark, carbonized surface that held firm, preventing the graft material from falling out or getting infected. This stability allowed for the regeneration of both hard bone and soft gum tissue, preserving the volume of keratinized tissue—the tough, durable gum tissue that is essential for long-term implant health. In several cases, the implant stability quotient, a measure of how firmly the implant is held by the bone, recorded high values, indicating that the implants were secure. The study also noted that patients who followed specific post-operative instructions, such as avoiding straws, spicy foods, and smoking for the first week, had the best outcomes. These simple precautions helped ensure that the delicate, laser-formed clot was not dislodged during the critical first week of healing.

The paper does not claim that this method is a universal cure for every dental situation, nor does it suggest that lasers replace all other surgical techniques. Instead, it presents a reliable tool that can be used when primary closure is difficult or when preserving the natural shape of the gum is a priority. The author acknowledges that different laser settings can produce different effects; for instance, lower power settings might take longer to form a clot, while the high-power settings used in this series created a rapid, firm seal. The study also hints at future possibilities, noting that newer laser units can combine different colors of light to penetrate tissue at various depths, potentially offering even more control. However, the core conclusion remains grounded in the data presented: using an 810-nanometer diode laser to coagulate blood in an extraction socket promotes stable healing, predictable bone regeneration, and long-term implant success, all while avoiding the need for tight sutures. This approach offers a practical solution for maintaining the jaw's structure, ensuring that when a patient eventually receives a new tooth, it rests on a foundation that has been carefully and effectively preserved.