Red Light Therapy for Dental Implant Stability: Scientific Evidence

Researchers in China evaluated an Nd:YAG laser for healing of the gum around new implants in a 2024 randomized controlled trial. 58 patients with 70 implants were randomly split, with the laser group receiving 1064 nm at 1.5 W for 2 minutes over the surgical area held about 5 mm away, right after surgery and on days 2 and 3, and the control group receiving nothing. Pain appeared significantly lower in the laser group for the first 3 days, and on days 7 and 14 the laser-treated gums bled less, were less inflamed, and produced less fluid, with lower inflammation markers and a higher healing-related growth marker. LLLT was judged worth using in the clinic to help gums heal and ease pain after implant surgery.

Stability scores after 3 months came out highest for implants given a 650 nm laser at 75 and 100 mW in a 2024 randomized controlled trial from Iraq. 15 patients had 2 implants each in the back of the lower jaw, the left side untreated and the right side given either a 650 nm laser or a 976 nm laser at 5 power settings over 40 seconds at each of the cheek and tongue sides, or L-PRF, a concentrate from the patient’s own blood, placed under the implant. Stability rose significantly in all 3 groups over 3 months, with the red laser at 75 and 100 mW giving the highest readings against the untreated side, the researchers reported.

Implant stability appeared higher with low-level laser therapy (LLLT) at both 2 weeks and 3 months, according to a 2024 randomized controlled trial from India. 20 patients missing 1 tooth on each side had 1 implant treated with a 940 nm laser at 100 mW and 14.18 J/cm² over 40 seconds on each of the cheek and palate sides daily for 12 days, and the other side left untreated. The trial found significantly higher stability scores on the laser side at 2 weeks and 3 months, which it read as better bone bonding. Further research was called for before LLLT becomes routine in implant care.

40 people with controlled type 2 diabetes who received dental implants showed denser bone around the implant when low-level laser therapy (LLLT) was added, in a 2023 randomized controlled trial from Egypt. 20 patients were treated with an 808 nm laser in contact at 50 mW for 1 minute 14 seconds per point (11 J) around implants in the back of the lower jaw, and 20 had implants placed without laser. Bone density on CT scans and a bone-turnover marker in the fluid around the implant both differed significantly between the groups, the researchers reported, with the marker falling over time in both but more steeply without the laser. LLLT was described as promising for diabetic patients because of its effect on bone quality during bonding.

According to a 2021 meta-analysis from Brazil, low-level laser therapy (LLLT) has a positive effect on the stability of orthodontic mini-implants. 5 randomized and 1 non-randomized trial covering 108 patients were pooled, using lasers from 618 to 940 nm at 100 mW to 1.7 W for 20 seconds to 20 minutes per session over 14 to 30 days. 5 of the 6 trials were rated at low risk of selection bias, and the pooled stability gain was significant across the trials, growing larger at 1, 2, and 3 months after placement.

Polish researchers applied an 808 nm diode laser to orthodontic micro-implants, small screws that anchor braces in the upper jaw, in a 2020 clinical trial. 44 micro-implants in 22 patients (14 women and 8 men) were split so that each person had 1 laser-treated and 1 untreated implant, with the laser delivering 4 J per point at 8 J/cm² on the cheek and palate sides right after placement and on days 3, 6, 9, 12, 15, and 30. Secondary stability, measured with a tapping device up to 2 months, appeared higher on the laser side, while pain on the first day was no different between sides.

Whether low-level laser (LLL) and LED light used together make dental implants more stable during healing was the question a 2020 randomized controlled trial in Iran set out to answer. 58 patients were split into a group that received combined LLL and LED light at 632 and 830 nm for 20 minutes a day for 10 days after implant placement, and a control group that received neither. By 9 weeks, stability scores had risen more in the light-treated group, according to the trial, which measured them at placement and at 10 days, 3 weeks, 6 weeks and 9 weeks.

Researchers in Poland tested a 635 nm diode laser on implant stability and bone density in a 2019 randomized controlled trial. 40 implants were placed in the back of the lower jaw in 24 patients (8 women and 16 men, average age 46.7), with 12 patients getting the laser at 100 mW and 8 J/cm² for 40 seconds per point, 6 times a week for 15 days, and 12 getting none. Secondary stability, the firmness an implant gains as bone grows onto it, and bone density both appeared higher in the laser group. Larger and longer trials in bone of different densities were called for.

In 2018, a clinical trial in Egypt asked whether low-level laser therapy could speed up bone bonding around dental implants that were put to use the same day. 20 patients, all taking vitamin C, omega-3, and calcium, each had 1 implant placed where a lower back tooth was missing, and 10 received a 904 nm laser in contact mode at 20 mW and 4.7 J/cm² for 30 seconds per session, while 10 healed without it. Bone density on X-rays rose in both groups over 6 months, but the gain was significantly larger on every side of the laser implants, roughly 22 points against 14 at the front and 22 against 11 at the back. The authors concluded that the laser significantly promoted bone healing and sped up bonding.

Among 12 people with no lower teeth who were getting implant-supported dentures, a 2018 randomized controlled trial in Iran compared low-level laser, LED light, and no light. Each person had 3 implants placed in the front of the lower jaw, randomly assigned 1 to each group, with the laser implants receiving 810 nm at 50 mW and 20 J/cm² for 6 minutes 40 seconds and the LED implants 626 nm at 185 mW and 46.2 J/cm² for 20 minutes, 5 times a week for 14 days. Researchers found that both the laser and the LED implants were significantly more stable 3 weeks after surgery.

92% of 100 implants had survived at 6 months in a 2018 clinical trial from Turkey comparing low-level laser therapy, 2 ozone protocols, and no treatment on implants fitted with temporary crowns the same day. 25 patients received 100 implants, split into 4 groups of 25 implants that were given a GaAlAs diode laser, standard ozone, a longer ozone protocol, or nothing. Standard ozone showed no advantage over the untreated implants, whereas stability scores came out significantly higher for both the laser and the longer ozone protocol. The authors concluded that both the laser and prolonged ozone are promising for bone healing around same-day-loaded implants, while calling for more studies.

15 patients took part in a 2014 clinical trial from Turkey of LED light on implant stability and on inflammation markers in the fluid around the implant. 7 received a 626 nm LED array over the surgical area at 38.5 mW/cm², 185 mW, and 46.2 J/cm² for 20 minutes, 3 times a week for 3 weeks from the day of surgery, while 8 controls had none. Stability scores in the control group fell significantly between weeks 2 and 12, but the LED group held its starting values, while the marker levels changed similarly in both groups.

Across 63 patients having implants placed in the upper or lower jaw, a 2025 randomized controlled trial compared low-intensity pulsed ultrasound (LIPUS), low-level laser therapy (LLLT), and standard care, with 21 in each group. LLLT was given in 4 sessions over 2 weeks with an 850 nm laser, and the ultrasound twice a week for 4 weeks, with bone loss, gum healing, pain, and how much mouth problems affected daily life tracked for up to 12 weeks. At 6 weeks and 3 months, significantly less bone had been lost with LIPUS than with LLLT or standard care, while LLLT gave the better gum healing at every check from day 7 to day 30, and both reduced pain and improved daily-life scores. The authors concluded that ultrasound suited bone preservation and laser suited gum healing.

Whether photobiomodulation (PBM) improves early and later implant stability was the question a 2025 meta-analysis from India set out to answer. 117 articles were screened, 15 reviewed, and 8 pooled, covering 562 patients and lasers from 626 to 980 nm applied to the cheek and tongue sides of dental implants. Control implants came out more stable at 2, 4, and 8 weeks, laser implants at 3 weeks, and neither at 6 or 12 weeks. The authors concluded that results were mixed, with some studies showing benefit and others none, and called for more research.

1 of 2 ways of measuring implant stability favored photobiomodulation (PBM) in a 2024 meta-analysis from Saudi Arabia that pooled 26 papers and 571 patients given PBM or no laser around dental implants. The studies used lasers from 630 to 980 nm and compared PBM against a placebo or no treatment. No significant difference appeared on the vibration-based stability score, where laser implants scored only 1.02 points higher, yet tapping-device readings and bone density, about 26 units higher, both favored PBM significantly. Bone loss around the implant and implant survival were the same with or without the laser, and most of the pooled studies had weaknesses in how patients were randomized.

When researchers in Spain tested diode laser photobiomodulation (PBM) on 40 dental implants in 13 patients, their 2023 randomized controlled trial looked at healing, inflammation, and stability together. The PBM implants received 2 sessions with combined 630 and 808 nm diode lasers at 100 mW for 1 minute 40 seconds, right after surgery and again at 7 days, while the rest received a sham laser. 45% of PBM implants reached the top healing score, compared with 18.2% of sham implants, and sites without the laser were about 4 times as likely to be inflamed, yet stability scores did not differ between groups over 8 weeks. Treating the bone with 808 nm and the gum with 630 nm in 2 sessions was judged an effective way to cut inflammation and speed early healing, pending more studies.

Published in 2022, this meta-analysis from India pooled trials of photobiomodulation (PBM) with low-level laser around dental implants. 10 articles qualified for the review and 7 for pooling, covering 381 patients and lasers from 626 to 980 nm. At 2 weeks, 1 month, and 2 months, laser-treated implants appeared significantly more stable than controls, but the difference was absent at baseline and from 3 months on. The authors concluded that PBM helps implant stability during early healing and can be considered for implant patients.

4 of 7 clinical studies found a potential positive effect of photobiomodulation (PBM) on dental implant stability, a 2020 review from Egypt reported, while 3 found no effect. The 7 studies covered 115 patients, mostly with implants in the back of the jaw, and used lasers or LED light at 626 to 940 nm, with 5 using a vibration-based stability test and 2 using a tapping test. Across the 115 patients, PBM after surgery may have some positive effect on bone bonding and stability, but methods varied so much that more uniform studies are needed.

Among 20 people aged 55 to 65 with moderately controlled diabetes and ill-fitting lower dentures, a 2019 randomized controlled trial in Egypt tested low-level laser irradiation (LLLI) on small-diameter implants. Each patient had 2 narrow implants placed in the lower jaw to hold the denture and loaded straight away, with 1 implant per patient given a 940 nm GaAlAs diode laser held 2 to 3 mm away for 6 minutes, 3 times a week for 7 days, and the other left as a control. Tapping-device readings appeared to favor the laser implants at every check, but the gap reached significance only at 6 months. Bone loss around the implants and survival (100% with laser vs. 95% without) did not differ.

Comparing a laser, a blood concentrate, and the 2 together against no extra treatment, a 2019 randomized controlled trial in Egypt placed implants in the back of the lower jaw of 40 men. The 4 groups received nothing extra, an 808 nm laser at 10 J/cm² for 1 minute 6 times a week for 14 days, L-PRF (a concentrate from the patient’s own blood), or both. Researchers found that all 3 treated groups bonded better than the untreated group on CT scans, with L-PRF alone doing best, the combination next, and laser alone the least. L-PRF was concluded to outperform the laser for bone bonding around implants.

Red light at 660 nm on the day of placement and infrared light at 808 nm in 6 later sessions were tested on orthodontic mini-implants in a 2019 clinical trial from Brazil. 48 mini-implants in 19 patients were split between photobiomodulation (PBM) or none, and between loading straight away or after 4 weeks, with the laser given at 100 mW for 20 then 40 seconds at 4 and 8 J/cm², held 15.5 mm from the tissue. Mini-implants given PBM lost less stability over 3 months of loading, especially when loading was delayed, yet every group shifted slightly in position, and the amount did not differ. Patients could not all be assigned at random because not all could attend every session, so the results were treated as needing confirmation.

Comparing laser with a sham on opposite sides of the upper jaw, a 2015 randomized controlled trial placed 44 self-tapping implants into the softer bone at the back of the upper jaw in 12 patients. The laser side received a 637 nm GaAlAs laser at 40 mW and 6.26 J/cm² per implant right after surgery and daily over the following week, with follow-up for 6 weeks. Only in week 5 did the laser implants read significantly more stable than the sham side, although they appeared ahead throughout, and a bone-forming marker did not differ at any point. Every implant succeeded in both groups, and the laser was judged to have no significant influence on bone bonding in this softer bone.

Researchers in Iran tested low-level laser therapy on implants that were put to use straight away alongside a gum graft in a 2024 randomized controlled trial. 10 patients with thin bone on the cheek side of the implant site received the graft, and the laser implants were treated with a 940 nm laser at 500 mW for 10 seconds per point on the cheek and tongue sides (90 J in total) over 14 days. No significant difference in secondary stability appeared between the laser and control groups, nor in gum thickness or bone gain, although the laser implants did firm up significantly in the cheek-to-tongue direction from their starting values. All implants succeeded without complications.

2021 brought a randomized controlled trial from Brazil on low-level laser therapy (LLLT) for implants placed in jaw sites that had already healed. 64 implants in 33 patients were randomly assigned to LLLT or a control group, with the laser group receiving an 808 nm GaAlAs laser at 50 mW for 1 minute 20 seconds and 11 J/cm² per application, given both before the implant site was drilled and again after the stitches were placed, 66 J/cm² in all. Implant stability turned out no different with the laser than without it, the trial concluded, and the laser was not recommended for implants in healed bone on this evidence.

This 2021 randomized controlled trial from Turkey asked whether photobiomodulation therapy (PBMT) improves implant stability in the early weeks of bone bonding. 93 implants were placed in a split-mouth design, 47 treated with an 830 nm GaAlAs diode laser at 126 mW and 6 J/cm² for 1 minute right after surgery and over the next 15 days, and 46 left untreated. No difference in stability scores appeared between laser and control implants at 1, 2 or 3 months, although both groups rose significantly from placement to day 90. The authors concluded that PBMT had no clinically significant effect on early implant stability.

A 2020 randomized controlled trial in Brazil evaluated whether low-level laser therapy (LLLT) improves the stability of implants placed into sockets straight after a tooth is removed. 50 implants were placed in 44 patients, who were randomly assigned to LLLT with an 808 nm GaAlAs laser at 50 mW for 1 minute 14 seconds per point in a single session, or to no laser. When the healing caps were fitted, stability scores did not differ between the laser and control implants, the trial found. 3 implants were lost to follow-up, and 1 control implant failed to bond, a 4.3% failure rate.

Across 8 clinical studies, a 2019 meta-analysis from China pooled the evidence on photobiomodulation therapy (PBMT) for dental implant stability and success. Of 675 articles found, only 8 qualified, half with a low risk of bias and half moderate, using lasers from 618 to 940 nm at 20 mW to 1.7 W. The pooled data showed no significant difference in implant stability at 10 days or at 3, 4, 6, and 12 weeks, nor in success rates. The authors concluded that current studies do not provide enough evidence of a positive effect and called for more high-quality randomized trials.

Adding a diode laser to a blood concentrate on 1 side of the jaw but not the other, a 2019 randomized controlled trial in Egypt treated 9 patients missing lower back teeth on both sides. Each side received an implant with PRF, a concentrate from the patient’s own blood, and 1 side also got an 830 nm laser at 100 mW and 92.1 J/cm² for 30 seconds twice a week for a month, starting on the day of surgery. Pain in the first week, bone density at 9 months, and stability at 9 months were all similar on the 2 sides, so the laser appeared to add nothing.

No significant difference in implant stability followed low-level laser therapy in a 2018 randomized controlled trial from Iran. 80 implants in 19 patients were split evenly, and the laser implants received a 940 nm diode laser at 100 mW and 14.18 J/cm² over 40 seconds on each of the cheek and palate sides in 7 sessions over 2 weeks, while the others had the handpiece switched off. Stability readings over 12 weeks changed in both groups but never differed between them, according to the trial, even though the early dip in stability was slower on the laser side.

A split-mouth design gave each of 8 patients laser on 1 side of the lower jaw and a sham on the other in a 2012 randomized controlled trial from Brazil. 30 implants were placed in the back of the lower jaw, and the laser side received an 830 nm GaAlAs laser at 86 mW and 92.1 J/cm² over 3 seconds at each of 20 points, starting right after surgery and repeated every 48 hours for 14 days. The trial found no evidence of any laser effect on stability readings taken up to 12 weeks, as both sides dipped around week 6 and then recovered. Every implant was stable and free of symptoms at a 6-month check.