# What the evidence can tell you about relief *What the Evidence Says — Regenerative Medicine Chandler* > Does regenerative medicine work? A plain answer about possible relief, uncertain results, and why relief does not mean a rebuilt joint. Your knee may loosen on the walk to the kitchen, then ache again by noon. Changing soreness doesn't mean the worn surface has changed. ## Does regenerative medicine work? Start with what is known For joint soreness, regenerative treatments mean non-surgical choices made with blood or tissue. Human studies suggest that certain forms may ease soreness for some people. The results vary by person, joint, and the material used. Other careful studies have found little difference from simpler care. Less soreness doesn't prove that the joint grew new tissue. Scans in human studies haven't shown steady repair where arthritis has worn the joint. Any benefit is possible rather than promised. You can weigh that chance against the cost, recovery, exercise, and care from your doctor. ## What to know about PRP results The letters PRP mean platelet-rich plasma, which comes from a blood sample spun to collect more platelets. Platelets are tiny blood parts that carry growth factors, which are proteins the body uses in healing. Those proteins may affect soreness for a while, even if worn surfaces stay the same. Feeling better and growing new joint tissue are two different results. A clinic can leave different amounts of platelets or white blood cells in PRP. Studies may therefore compare treatments with the same name but a different mix. Human research doesn't give one settled answer for every kind of PRP. Ask which kind is offered and whether no relief is also possible. ## What to compare before you decide Compare paid care with gentle exercise and the advice from your usual doctor. Stronger muscles may steady the joint even though the worn surface remains. Choose one change you could notice, such as easier walking or sounder sleep. That gives you a plain way to judge whether treatment helped. Ask how soon relief might start and whether later visits add cost. The first price doesn't always tell you the total amount. Choosing the treatment or deciding against it can both be reasonable. Your exam, health, goal, and budget help you decide between them. ## Sources 1. The RESTORE trial - a participant-, injector- and assessor-blinded RCT of 288 adults aged 50+ with symptomatic medial knee OA (Kellgren-Lawrence 2-3) - compared three weekly intra-articular PRP injections against saline placebo, with co-primary endpoints of 12-month knee pain and medial tibial cartilage volume on MRI. PRP did not beat placebo on either. It is the single best-designed test of the specific claim that PRP changes joint structure, and it was negative. Bennell KL, 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. 2. A four-arm, multicentre, single-blind phase 2/3 randomized trial of 480 knee OA patients (KL II-IV) compared autologous bone marrow aspirate concentrate, autologous adipose stromal vascular fraction and allogeneic umbilical-cord-tissue mesenchymal stromal cells against a corticosteroid injection control. At 12 months NONE of the three orthobiologic injections was superior to another, or to the corticosteroid control, and none of the four groups showed a significant change in MRI osteoarthritis score from baseline. No procedure-related serious adverse events occurred. Mautner K, et al. — [Cell-based versus corticosteroid injections for knee pain in osteoarthritis: a randomized phase 3 trial.](https://pubmed.ncbi.nlm.nih.gov/37919438/). *Nature medicine*, 2023. DOI: 10.1038/s41591-023-02632-w. 3. A 2026 systematic review and meta-analysis of 28 randomized trials of intra-articular mesenchymal stem cell-based therapies in knee OA found significant improvements in several pain and function measures (delta-VAS MD -1.67; KOOS pain MD 15.37) but NO significant difference in WOMAC, KOOS quality of life or the Lequesne index, and MRI-based WORMS scores were non-significant - indicating no consistent structural benefit. Its own conclusion: these therapies serve a primarily SYMPTOM-modifying rather than STRUCTURE-modifying role, with higher frequencies of local reactions to weigh against the symptomatic benefit. Awad G, et al. — [Efficacy and safety of intra-articular mesenchymal stem cell-based therapies in knee osteoarthritis: A systematic review and meta-analysis of randomized controlled trials.](https://pubmed.ncbi.nlm.nih.gov/41863718/). *Clinical rheumatology*, 2026. DOI: 10.1007/s10067-026-08042-w. 4. A GRADE-rated systematic review and meta-analysis of 16 randomized trials (807 participants) found that MSC therapy for chronic knee OA pain PROBABLY RESULTS IN LITTLE TO NO DIFFERENCE in pain relief at 3-6 months (WMD -0.74 cm on a 10 cm VAS against a minimally important difference of 1.5 cm) or physical functioning (WMD 2.23 on the SF-36 100-point subscale against a 10-point MID), both moderate certainty; at 12 months pain was again probably little-to-no-different (WMD -0.73 cm). The measured effect is real but sits BELOW the threshold at which a patient would notice it. Sadeghirad B, et al. — [Mesenchymal stem cells for chronic knee pain secondary to osteoarthritis: A systematic review and meta-analysis of randomized trials.](https://pubmed.ncbi.nlm.nih.gov/38777213/). *Osteoarthritis and cartilage*, 2024. DOI: 10.1016/j.joca.2024.04.021. 5. A randomized trial of 90 patients with KL grade 1-3 knee OA found bone marrow aspirate concentrate - the product most often sold as a 'stem cell injection' - was EQUIVALENT to, not better than, PRP through 24 months, with no statistically significant IKDC or WOMAC difference at any time point. Both arms improved from baseline and plateaued at 3 months. Anz AW, et al. — [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/). *The American journal of sports medicine*, 2022. DOI: 10.1177/03635465211072554. 6. FORWARD, the longest disease-modifying osteoarthritis drug trial reported to date, gave intra-articular sprifermin (a recombinant FGF-18) or placebo to knee OA patients and followed 378 of them for 5 years. Sprifermin produced a significant, sustained dose-response INCREASE in total femorotibial cartilage thickness versus placebo - and WOMAC pain improved about 50% from baseline in ALL groups, including placebo. It is the cleanest demonstration in the literature that adding measurable cartilage and relieving pain are two different results, and that one does not deliver the other. Eckstein F, et al. — [Long-term structural and symptomatic effects of intra-articular sprifermin in patients with knee osteoarthritis: 5-year results from the FORWARD study.](https://pubmed.ncbi.nlm.nih.gov/33962962/). *Annals of the rheumatic diseases*, 2021. DOI: 10.1136/annrheumdis-2020-219181. 7. The AAOS third-edition clinical practice guideline for non-arthroplasty management of knee osteoarthritis is the orthopedic profession's own GRADE-style appraisal of the same options a regenerative clinic sells; it is the benchmark against which any 'regenerative' claim on this topic should be read, and it rates the strongest support for exercise, weight loss and self-management rather than for injectables. Brophy RH, et al. — [AAOS Clinical Practice Guideline Summary: Management of Osteoarthritis of the Knee (Nonarthroplasty), Third Edition.](https://pubmed.ncbi.nlm.nih.gov/35383651/). *The Journal of the American Academy of Orthopaedic Surgeons*, 2022. DOI: 10.5435/JAAOS-D-21-01233. ## What to do when the joint stays sore QC Kinetix offers a consultation at no charge at its Chandler clinic on South Dobson Road. A medical provider will examine your joint, review earlier care, and discuss regenerative treatment options that may fit. Take your medicines and old reports, then ask about likely relief, recovery, limits, and full cost. You can go home and decide after you have those answers. Schedule a free consultation: --- Clear help when a joint stays sore. Plain help for joint soreness in Chandler, from easy home measures to warning signs and non-surgical care. Plain facts about aching joints, simple measures, danger signs, and non-surgical choices in Chandler. This site is operated by the owners of the QC Kinetix clinics in the Phoenix area, including the Chandler location at 1100 S. Dobson Rd., Suite 210. It is a commercial publication and carries no reviews, ratings or patient stories. © 2026 The Word and the Evidence · Chandler, Arizona. Educational content only, not medical advice about your particular joint.