Viscosupplementation in lumbar facet joint arthropathy: a pilot study

Degeneration of the spine is a prevalent problem that generally advances with age, although its occurrence is not restricted to the elderly. Chronic low back pain is a common problem with several treatments, but rigorous evaluation of many interventions is still lacking. One of the most common methods of treating lumbar facet arthropathy is intra-articular injection of local anesthetic and steroid. However, in large joints, such as the knee, viscosupplementation has been shown to compare favorably to steroid in terms of symptom relief and duration of benefit. It is suggested that viscosupplementation may supersede steroid in treatment of symptomatic knee osteoarthritis. Hyaluronic acid (HA) therapy is still in its infancy in joints outside the knee, although some preliminary results are promising.

This was a pilot study to test the potential effectiveness of HA injection therapy in the treatment of lumbar facet joint arthritis.

Thirteen patients with symptomatic lumbar facet joint arthritis who met the inclusion criteria were prospectively recruited. Pretreatment evaluation of patients was by questionnaire, including the Visual Analog Score and Oswestry Disability Questionnaire. A single injection of HA into affected facet joints was then performed, with correct placement confirmed on fluoroscopy. The patients were similarly evaluated 6 weeks after treatment.

Eighteen facets in 13 patients were injected with HA. At 6-week follow up, there was no significant improvement in pain when measured on the Visual Analog Score. There was also no significant improvement in the Oswestry Disability Questionnaire.

Preliminary results from this pilot study do not demonstrate any benefit of viscosupplementation in the management of symptomatic lumbar facet arthropathy.