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Subchondral Bone Injections for the Treatment of Knee Osteoarthritis

Rodriguez-Merchan EC

The archives of bone and joint surgery, 2026

30 participants

Abstract

The existing literature on whether subchondral bone injections in knee osteoarthritis is advisable for relieving patient pain is minimal and the level of evidence is low. A recent case series (2023) analyzed 30 individuals with knee OA (Kellgren-Lawrence 2-3). It showed that combined intraarticular and subchondral BMAC (bone marrow aspirate concentrate injections) provided clinical and imaging benefits up to 24 months for the treatment of symptomatic knee OA, with a low failure rate, and a significant reduction of bone marrow edema. Besides, VAS (visual analog scale) pain worsened at the final follow-up, although remained lower compared to the baseline value. Although some studies mention that subchondral bone injections can relieve pain in mild/moderate knee OA, it does not seem reasonable to advise it until better-designed research can confirm the preliminary studies discussed in this article.

How strong is the evidence?

Evidence Hub reads this as a case series, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health. Reported size: 30 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

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