ArticleCureus2025
Quantitative Radiographic Progression of Joint Space Narrowing in Medial and Lateral Compartment Knee Osteoarthritis After Intraarticular Platelet-Rich Plasma Injection.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
introductionKnee osteoarthritis (KOA) is a common pathology of the knee. Intraarticular injection of platelet-rich plasma (PRP) can be used as a nonoperative therapy to improve symptoms. The impact of PRP on structural derangements of KOA has not been widely studied. Although radiography is an appropriate imaging modality for initial evaluation and follow-up, many published studies evaluating for structural change in KOA use magnetic resonance imaging or ultrasound.
objectiveThe aim of our study was to evaluate for change in osteoarthritis severity and joint space width (JSW) on radiography in patients with KOA treated with PRP.
methodsIncluded study patients had pre-injection and post-injection posterior-anterior flexion radiography obtained. Severity of osteoarthritis was assessed using the Kellgren-Lawrence grade, and JSW was measured.
resultsSixteen patients with 20 PRP-treated knees (13 medial-compartment-predominant and seven lateral-compartment-predominant KOA) were included in the analysis. Severity grade did not change in 18 of the 20 knees but worsened in two knees at follow-up. A median change of -0.1 mm in JSW after PRP injection at a median follow-up of 11.5 months was seen in both lateral- and medial-compartment-predominant knees, which is less than the expected annual rate of joint space narrowing in untreated KOA.
conclusionOur study was underpowered and therefore was not able to demonstrate a significant structural change following PRP treatment using a radiographic comparison model. Larger studies are needed to provide further assessment on the structural impact of PRP injection in KOA.
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