# Which knee procedure might make sense for me? *Knee Injections Guide — Knee Pain Treatment Glendale* > A plain knee injections guide for knee pain treatment Glendale, covering cortisone, gel, PRP, marrow concentrate, cost, and fit. ## What would each choice put in my knee? Glendale’s long drives can make repeat clinic trips wearisome. Your knee care can’t ignore the ache or the travel. Cortisone puts medicine into the joint to calm swelling for a while. Gel is meant to copy the knee’s slippery fluid. PRP means platelet-rich plasma; staff take an arm blood sample to make it. A machine spins the sample, gathers more platelets, and the clinic puts that portion into your knee. Bone marrow concentrate is different: a needle draws liquid marrow from the pelvis, and the clinic separates a smaller portion before putting it into the knee. I’d want each step explained before I agreed to it. ## How long might help last, and what could go wrong? Cortisone may help most during the first two to six weeks. In stronger studies, little benefit remained by about twelve weeks. Repeating cortisone every twelve weeks for two years caused more cartilage loss than salt water and didn’t ease soreness better. That’s why a standing repeat schedule needs a clear reason. Large fair tests found that gel changed soreness very little beside salt water. Some people do feel better, but you can’t count on it. PRP results don’t agree. Clinics don’t always keep the same platelet amount or the same number of white blood cells, so their PRP may not match the study material. ## What do I need to ask at the visit? The visit starts with the sore spot, swelling, and knee movement. Take the names of your medicines plus any old exam or X-ray reports. Ask what’ll go into your knee and who will do it. Then ask about cost, when a change might show, and what happens if nothing changes. Pick one daily test before you go. You might use a familiar walk, a flight of stairs, or a full night’s sleep. Keep up the safe walks and leg work that already help. QC Kinetix provides regenerative treatments, meaning procedures that use a body sample such as arm blood or liquid from the pelvis; its medical providers—the people who examine you and carry out care—check the knee before discussing a non-surgical choice, and the label isn’t a promised result. ## Sources 1. In a 2-year, double-blind RCT of 140 patients with symptomatic knee OA and ultrasound synovitis, intra-articular triamcinolone 40 mg every 12 weeks caused significantly GREATER cartilage volume loss than saline (index-compartment cartilage thickness change -0.21 mm vs -0.10 mm; between-group difference -0.11 mm, 95% CI -0.20 to -0.03) with NO significant difference in pain (-1.2 vs -1.9 on the WOMAC Likert pain subscale). McAlindon TE, LaValley MP, Harvey WF, et al. — [Effect of Intra-articular Triamcinolone vs Saline on Knee Cartilage Volume and Pain in Patients With Knee Osteoarthritis: A Randomized Clinical Trial.](https://pubmed.ncbi.nlm.nih.gov/28510679/). *JAMA*, 2017. DOI: 10.1001/jama.2017.5283. 2. A Cochrane review of 27 trials (1,767 participants) of intra-articular corticosteroid versus sham or no treatment in knee OA graded the quality of evidence as LOW for all outcomes, citing inconsistent effect estimates, wide variation across trials and imprecise pooled results. Juni P, Hari R, Rutjes AW, et al. — [Intra-articular corticosteroid for knee osteoarthritis.](https://pubmed.ncbi.nlm.nih.gov/26490760/). *Cochrane Database of Systematic Reviews*, 2015. DOI: 10.1002/14651858.CD005328.pub3. 3. A Radiology review documented four categories of adverse joint event structurally observed after intra-articular corticosteroid injection of the hip and knee: accelerated osteoarthritis progression, subchondral insufficiency fracture, complications of osteonecrosis, and rapid joint destruction including bone loss — concluding that these injections are 'perhaps not as safe as we thought' and that risk factors need to be identified before intervention. Kompel AJ, Roemer FW, Murakami AM, Diaz LE, Crema MD, Guermazi A. — [Intra-articular Corticosteroid Injections in the Hip and Knee: Perhaps Not as Safe as We Thought?](https://pubmed.ncbi.nlm.nih.gov/31617798/). *Radiology*, 2019. DOI: 10.1148/radiol.2019190341. 4. A BMJ meta-analysis of 169 trials (21,163 participants) found viscosupplementation (hyaluronic acid injection) reduced knee OA pain by SMD -0.08 (95% CI -0.15 to -0.02) in the 24 large placebo-controlled trials — about 2.0 mm on a 100 mm scale, far below the prespecified 0.37 SMD minimal clinically important difference — and increased serious adverse events (RR 1.49, 95% CI 1.12 to 1.98). Trial sequential analysis showed conclusive evidence of clinical equivalence to placebo has existed since 2009. Pereira TV, Juni P, Saadat P, et al. — [Viscosupplementation for knee osteoarthritis: systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/36333100/). *BMJ*, 2022. DOI: 10.1136/bmj-2022-069722. 5. An earlier Annals of Internal Medicine meta-analysis of 89 trials (12,667 adults) found viscosupplementation moderately reduced pain overall (effect size -0.37), but the effect shrank toward nothing in the highest-quality subsets: five UNPUBLISHED trials showed an effect size of -0.03 (95% CI -0.14 to 0.09). Trial size, blinded outcome assessment and publication status all predicted effect size — a textbook demonstration of publication bias in this literature. Rutjes AW, Juni P, da Costa BR, Trelle S, Nuesch E, Reichenbach S. — [Viscosupplementation for osteoarthritis of the knee: a systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/22868835/). *Annals of Internal Medicine*, 2012. DOI: 10.7326/0003-4819-157-3-201208070-00473. 6. A Bayesian network meta-analysis restricted to LARGE randomized trials (>=100 patients per group) of 18 intra-articular interventions in knee and hip OA found treatment effects were larger in the 35 high-risk-of-bias trials than in the 22 low/unclear-risk trials. Excluding high-risk trials, triamcinolone had the highest probability of exceeding the minimal important difference at weeks 2 and 6; hyaluronic acid had NO effect on pain (SMD -0.04, 95% CrI -0.19 to 0.11) but higher odds of dropouts due to adverse events (OR 2.01) and of serious adverse events (OR 1.86) than placebo. Effects of 16 of the 18 interventions were smaller than the MID and most were consistent with placebo. da Costa BR, et al. — [Effectiveness and safety of intra-articular interventions for knee and hip osteoarthritis based on large randomized trials: A systematic review and network meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/39265924/). *Osteoarthritis and Cartilage*, 2025. DOI: 10.1016/j.joca.2024.08.014. 7. The RESTORE trial randomized 288 adults aged 50+ with symptomatic mild-to-moderate medial knee OA to three weekly leukocyte-poor PRP injections or saline placebo. At 12 months, pain change was -2.1 vs -1.8 points (difference -0.4; 95% CI -0.9 to 0.2; P=.17) and medial tibial cartilage volume change was -1.4% vs -1.2% (P=.81). 29 of 31 prespecified secondary outcomes showed no significant between-group difference. The authors concluded the findings 'do not support use of PRP for the management of knee OA.' Bennell KL, Paterson KL, Metcalf BR, et al. — [Effect of Intra-articular Platelet-Rich Plasma vs Placebo Injection on Pain and Medial Tibial Cartilage Volume in Patients With Knee Osteoarthritis: The RESTORE Randomized Clinical Trial.](https://pubmed.ncbi.nlm.nih.gov/34812863/). *JAMA*, 2021. DOI: 10.1001/jama.2021.19415. 8. A randomized trial of 90 patients with KL grade 1-3 knee OA found bone marrow aspirate concentrate ('stem cell injection') was EQUIVALENT to, not better than, PRP at 24 months: no statistically significant IKDC or WOMAC difference between groups at any time point, with both improving from baseline and plateauing at 3 months. Anz AW, Plummer HA, Cohen A, Everts PA, Andrews JR, Hackel JG. — [Bone Marrow Aspirate Concentrate Is Equivalent to Platelet-Rich Plasma for the Treatment of Knee Osteoarthritis at 2 Years: A Prospective Randomized Trial.](https://pubmed.ncbi.nlm.nih.gov/35289231/). *American Journal of Sports Medicine*, 2022. DOI: 10.1177/03635465211072554. 9. Medicare's national coverage policy states that CMS covers autologous platelet-rich plasma ONLY for patients with chronic non-healing diabetic, pressure and/or venous wounds, and only within an approved coverage-with-evidence-development clinical study. There is no Medicare national coverage for PRP in knee osteoarthritis, which is why these injections are billed to the patient as cash-pay. Centers for Medicare & Medicaid Services — [Autologous Platelet-rich Plasma (Coverage with Evidence Development)](https://www.cms.gov/medicare/coverage/evidence/plasma). *CMS.gov*, 2024. 10. FDA states verbatim: 'None of these products have been approved for the treatment of any orthopedic condition, such as osteoarthritis, tendonitis, disc disease, tennis elbow, back pain, hip pain, knee pain, neck pain, or shoulder pain.' The only FDA-approved stem cell products in the United States are blood-forming (hematopoietic progenitor) cells derived from umbilical cord blood, approved only for disorders of blood production. There are currently NO FDA-approved exosome products. U.S. Food and Drug Administration — [Consumer Alert on Regenerative Medicine Products Including Stem Cells and Exosomes](https://www.fda.gov/vaccines-blood-biologics/consumers-biologics/consumer-alert-regenerative-medicine-products-including-stem-cells-and-exosomes). *FDA (Center for Biologics Evaluation and Research)*, 2020. ## Want someone to look at your knee? Take notes about the ache, your medicines, and earlier care. The clinician examining your knee can explain the choices and say when other care makes more sense. Schedule a free consultation: --- Straight talk about a sore knee. Straight answers about knee soreness, simple home care, danger signs, treatment choices, and nearby clinics. Plain help for understanding a sore knee and deciding what to ask next. This site is operated by the owners of the QC Kinetix Phoenix-area clinics, including the locations serving Glendale, and those owners benefit when readers book a consultation. © 2026 Glendale Knee Field Notes. General education only; it does not replace diagnosis or advice from a qualified medical professional.