A newly published study has introduced a minimally invasive laser device for the treatment of knee osteoarthritis, suggesting it could help delay or potentially replace the need for joint replacement surgery in some patients.

The basic science study, titled Therapeutic window of laser dosimetry for the treatment of knee osteoarthritis, was published in Lasers in Surgery and Medicine and selected as the journal’s December 2025 Editor’s Choice. The research evaluates the safety and effectiveness of spatial-temporal modulated infrared laser radiation delivered within a defined therapeutic window designed to promote tissue repair without causing thermal damage.

Knee osteoarthritis is a chronic, degenerative condition and a leading cause of pain and disability worldwide. While early-stage disease is often managed conservatively, patients with progressive cartilage degeneration frequently require surgical intervention, including total knee replacement. The study explores whether a targeted laser-based approach could offer a less invasive alternative for patients in the early to mid-stages of disease.

The technique described uses controlled thermomechanical action induced by modulated infrared laser radiation to stimulate cartilage repair while avoiding structural damage to surrounding tissue. According to the authors, careful optimisation of laser parameters is critical to achieving regeneration without overheating or destruction of cartilage.

The study was led by Dr Yulia Alexandrovskaya, senior researcher at Terra Quantum AG, and focused on identifying the therapeutic window in which laser dosimetry remains both safe and effective. The researchers determined an optimal power range that supports tissue regeneration and restoration across different defect conditions and radiation delivery settings.

Alexandrovskaya said: “Towards enhancing quality of life, our innovative laser approach to minimally invasive treatment of knee osteoarthritis is designed to provide long-term pain relief and reduce the need for knee replacement surgery.”

The findings indicate that the laser parameters identified can induce regenerative effects without causing thermal injury, a key limitation of earlier laser-based approaches. The authors suggest this non-destructive method could be integrated with arthroscopy, allowing surgeons to target degenerative cartilage defects directly while minimising damage to healthy tissue.

While the study was conducted at the basic science level, the results support the feasibility of advancing the technology into clinical trials. The authors propose future studies using a 1470 nm laser in combination with arthroscopic procedures to assess its ability to restore degenerative cartilage, reduce pain and improve joint function in patients with knee osteoarthritis.

Importantly, the study focuses on delaying disease progression rather than replacing existing surgical approaches outright. Joint replacement surgery remains highly effective for advanced osteoarthritis, but demand continues to rise as populations age. Technologies that can safely postpone surgery could help reduce healthcare burden while improving quality of life for patients.

The Editor’s Choice designation reflects the journal’s assessment of the study’s scientific significance and potential clinical relevance. However, the authors note that clinical efficacy, durability of benefit and patient selection criteria will need to be established through carefully designed human trials.

If successful in clinical settings, the laser-based approach could expand the range of treatment options available for osteoarthritis, particularly for patients seeking minimally invasive interventions before disease reaches an advanced stage.