BACKGROUND

The Multiwave Locked System (MLS) has been shown to reduce inflammation and enhance biostimulation.

OBJECTIVES

The aim was to investigate the effect of using MLS laser in reducing pain severity in patients with chronic back pain.

METHODS

This randomized double-blind study was conducted on 30 patients (15 in each group) with chronic low back pain (LBP) who were referred to Imam Khomeini Hospital and diagnosed by a physical medicine specialist based on diagnostic criteria. The intervention group was treated with MLS multiple wave laser, performed 12 times, with patients receiving laser treatment twice a week. The control group was treated with exercise therapy. Pain intensity was evaluated using the Visual Analog Scale (VAS) before treatment and 6 weeks after treatment. Pain was analyzed before and after the intervention, both within and between groups.

RESULTS

Of the 30 evaluated patients, the mean and standard deviation of age (P = 0.392) and gender (P = 0.666) were not statistically significant between the two groups. The VAS value before treatment in the intervention and control groups was 7.66 ± 1.11 and 7.73 ± 1.16, respectively (P = 0.794). After treatment, the VAS values in the MLS and control groups were 5.60 ± 1.35 and 7.73 ± 1.16, respectively. Statistical evaluation showed a statistically significant difference between the two groups (P = 0.001), and the total change in VAS values was significant (P = 0.001).

CONCLUSIONS

Multiwave Locked System laser can reduce the pain severity of chronic LBP, with the reduction rate in the intervention group being significantly higher than in the exercise group.