Effectiveness of Thread-Embedding Acupuncture at EX-B2 on the Oswestry Disability Index and Finger-to-Floor Distance in Chronic Low Back Pain

Chronic low back pain (CLBP) is a leading cause of disability worldwide and significantly impairs functional capacity and quality of life. Non-pharmacological therapies are recommended as first-line management, and acupuncture has demonstrated potential benefits in reducing pain and disability. Thread embedding acupuncture (TEA) is a modified acupuncture technique that provides prolonged stimulation through the implantation of absorbable polydioxanone (PDO) threads at acupuncture points. This randomized controlled trial aims to evaluate the effectiveness of TEA at the EX-B2 points compared with sham TEA in improving disability and lumbar flexibility in patients with chronic non-specific low back pain. Disability will be assessed using the Oswestry Disability Index (ODI), and lumbar flexibility will be measured using the Finger-to-Floor Distance (FFD) test over an 8-week follow-up period.