Melatonin Reduced Bone Loss Around Immediate Implants in Small Trial

Most people know melatonin as a sleep aid. A new trial suggests it may also help protect the bone around dental implants, at least when it's packed straight into the socket. Patients who got it lost noticeably less bone in the first six months. The catch is in the details, and there are a few.

TL;DR

• Melatonin powder mixed with saline was packed into the gap around immediate premolar implants.

• Marginal bone loss averaged 0.44 mm with melatonin and 0.77 mm without it.

• Bone volume around the implant dropped about 4% with melatonin and 15% without it.

• Only 24 patients were followed for six months, so the results are an early signal.

What Did the New Melatonin Dental Implant Study Investigate?

The trial was run by Toka Moustafa Helal, Magda Mohamed Saleh, and Dina Metawie in the oral and maxillofacial surgery department at Alexandria University in Egypt, and published in BMC Oral Health on October 17, 2026. They wanted to know whether melatonin, placed directly around a fresh implant, would change how the surrounding bone remodels.

All 24 patients, aged 25 to 50, needed a hopeless upper premolar replaced. Each had the tooth extracted and an implant placed in the same visit. That's immediate placement, which is different from immediate loading. Here, the crowns went on six months later, so the immediate versus early implant loading debate doesn't apply.

Case selection was tight. Every site had an intact buccal plate and a gap under 2 mm between implant and socket wall, so no bone grafting was needed. Patients were non-smokers without conditions or medications affecting bone. One surgeon placed all the implants 1 to 2 mm below the crest with 35 to 40 Ncm of torque, then added a healing abutment.

The melatonin group had the contents of a 3 mg melatonin capsule mixed with saline and packed into the gap. The control group got nothing in the gap. Patients were randomly assigned, and a blinded examiner read the CBCT scans at placement and at six months.

Did Melatonin Reduce Bone Loss Around Dental Implants?

On the main bone measures, yes. Marginal bone loss is the drop in bone height at the neck of the implant, measured mesially and distally from the implant platform. Bone volume here meant the amount of bone in the top 3 mm around the implant, where the melatonin was placed.

The 0.33 mm difference in marginal bone loss sounds small, but it's measured over just six months and before loading. The first months after placement are when most early crestal remodeling happens. Keeping more bone at the neck of an implant helps support the soft tissue and the eventual emergence profile.

One result deserves a closer look. Bone density was the trial's primary outcome, and the final density values weren't significantly different between groups. The melatonin group only pulled ahead on percentage gain from baseline. The serum OPG difference, a blood marker linked to reduced bone breakdown, had also faded by three months.

How Might Melatonin Affect Bone Healing and Osseointegration?

Melatonin is best known as the sleep hormone, but bone cells respond to it too. In lab and animal studies, it encourages osteoblasts, the cells that build bone, and holds back osteoclasts, the cells that break it down. It does that partly by raising osteoprotegerin (OPG), a protein that blocks the main signal osteoclasts need to form. It's also an antioxidant, which may calm the inflammation that follows surgery.

An extraction socket is already a busy healing site. The bone walls remodel and shrink, and the buccal plate is especially prone to resorption, as covered in the tooth extraction healing stages guide. Placing an implant at the same time doesn't stop that process. Anything that slows early resorption around the implant neck could help preserve bone during osseointegration.

The early rise in blood OPG in this trial fits that story. Still, the trial measured outcomes, not mechanism. It can't prove melatonin worked through OPG, and the authors note that OPG in blood may not reflect what's happening right at the implant.

Could Melatonin Become Part of Dental Implant Treatment?

It's not ready yet. The idea is appealing, since melatonin is cheap, widely available, and has a long safety record as an oral supplement. But a few practical details stand out.

The melatonin in this trial came from an over-the-counter 3 mg supplement capsule, emptied and mixed with saline at the chair. Supplement capsules contain fillers, and they aren't made or tested as sterile surgical materials. There's also no agreed dose, carrier, or technique. Before this could become routine, someone would need to settle those questions and show the effect holds up in longer, larger trials.

None of this should be read as advice to take melatonin pills after implant surgery. The trial tested a local application packed into the socket. It says nothing about swallowing a supplement.

For now, the things that most affect early bone levels are still case selection, implant position, and surgical technique. Those belong in dental implant treatment planning and in each patient's dental treatment plan. Guided implant surgery can help with positioning, especially in fresh sockets where the drill tends to slip toward the thinner wall.

What Are the Study's Limitations?

The authors are open about most of them. With 12 patients per group and six months of follow-up, this is early-phase evidence. It covers only upper premolars in healthy non-smokers with ideal sockets, which are the cases least likely to run into trouble.

The control group had nothing placed in the gap, so there was no placebo filler. The authors acknowledge that simply packing the gap with a paste may have had some physical effect on the bone volume result. The surgeon and patients also knew who got melatonin, though the scans were read blind. The trial was registered after it began.

The numbers themselves are worth a careful look. The marginal bone loss ranges didn't overlap at all, 0.30–0.55 mm against 0.70–0.90 mm. That's an unusually clean split for a clinical study, and measuring fractions of a millimeter on CBCT next to titanium is hard because of scatter and artifacts. The study also didn't record implant stability, probing depths, bleeding, or soft tissue thickness.

Larger multicenter trials with a placebo, molar and anterior sites, delayed placement, and follow-up after loading would show whether this holds up.

Bottom Line

In this small Alexandria trial, packing melatonin around immediate premolar implants was linked to less marginal bone loss and better-preserved bone volume at six months. It fits with earlier, mostly small studies pointing the same way. But the main density outcome wasn't significantly different. There was no placebo, and nothing is known beyond six months. Melatonin is worth studying further. It isn't a new standard for implant placement, and patients shouldn't take supplements expecting it to help.