Clinical Efficacy of Low-Level Laser Therapy as an Adjunct to Non-Surgical Treatment of Peri-Implantitis: A Systematic Review and Meta-Analysis

Why It Matters

The results suggest that laser‑based adjuncts can enhance short‑term clinical management of peri‑implantitis, potentially reshaping dental practice standards and driving demand for standardized laser devices.

Key Takeaways

• LLLT cuts probing depth by 0.34 mm.
• Bleeding on probing drops 0.28 units.
• Plaque index improves by 0.44 points.
• No significant effect on marginal bone loss.
• Outcomes vary by laser type and protocol.

Pulse Analysis

Peri‑implantitis remains a pervasive complication of dental implants, affecting up to 20 % of patients and often requiring intensive maintenance. Traditional non‑surgical mechanical debridement can control inflammation but frequently falls short of restoring healthy peri‑implant tissues. In this context, clinicians have turned to adjunctive technologies such as low‑level laser therapy and antimicrobial photodynamic therapy to boost outcomes without resorting to surgery, prompting a surge in research and market interest.

The recent meta‑analysis of fifteen RCTs provides the most comprehensive quantitative assessment to date. While the pooled data reveal statistically significant improvements in probing depth, bleeding on probing, and plaque scores, the absolute changes are modest—generally less than half a millimeter or a few index points. Notably, marginal bone loss did not differ, indicating that laser adjuncts primarily address soft‑tissue inflammation rather than hard‑tissue regeneration. The pronounced heterogeneity (I² exceeding 80 % for several outcomes) reflects divergent laser wavelengths, energy settings, and treatment frequencies, with Er,Cr:YSGG and aPDT protocols emerging as the most effective.

For practitioners, the findings signal a cautious endorsement of laser adjuncts: they can refine short‑term clinical parameters when applied with evidence‑based protocols, but they are not a panacea for bone loss. Manufacturers should prioritize standardizing device settings and delivering clear clinical guidelines to reduce variability. Future research must focus on long‑term outcomes, cost‑effectiveness, and head‑to‑head comparisons of laser modalities to solidify their role in comprehensive peri‑implantitis management.