# What can shoulder evidence really tell you? *Shoulder regeneration Gilbert | What the Evidence Says* > Shoulder regeneration Gilbert evidence can tell you about soreness and movement. It can't turn symptom relief into proof of rebuilt cartilage. This page tells you what research can prove. It can measure soreness, movement, and scan changes. Those results don't always agree. You may feel better without a scan change. A scan change won't always ease soreness. Regeneration means care intended to support tissue repair. ## What result matters for my daily life? Choose one action you miss. Maybe you want easier sleep or reaching. That'll give the visit a clear target. Pain scores show whether soreness changed. Motion tests show how far you reach. Strength tests show what your arm can hold. A scan answers a different question. It shows tissue wear at that moment. It doesn't measure your daily limits. ## What does the evidence say about PRP? PRP, short for platelet-rich plasma, is one blood portion separated by spinning. That process gathers more platelets into the prepared portion. Platelets are tiny blood parts used in repair. Knee research can't prove what helps shoulders. Shoulder problems won't always have the same results. That's why one promise can't fit everyone. After an exam, QC Kinetix offers talks about regenerative care, which uses a prepared blood portion and aims to support repair. Improvement would mean less soreness or better use. It wouldn't prove that cartilage returned. ## What questions keep the choice clear? Ask which shoulder tissue seems sore. Then ask what change you might notice. A useful answer names soreness, reach, or strength. Ask how long it'll last. You'll also need the likely risks. The clinic should explain its exact blood preparation. Compare those answers with your other choices. That includes exercise and surgery when needed. Cost matters when care isn't covered. Write down the task hurting now. Check that same task after care. You'll have a fair way to compare. ## 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. 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. 4. MACI (autologous cultured chondrocytes on a porcine collagen membrane, Vericel; STN BL 125603) IS an FDA-LICENSED cell therapy - and its approved indication is narrow and specific: repair of symptomatic, single or multiple FULL-THICKNESS cartilage defects OF THE KNEE, with or without bone involvement, in adults. It is not approved for osteoarthritis. The existence of one licensed cartilage cell therapy for focal defects is the sharpest available way to show what a licensed 'regeneration' product actually looks like, and how far it is from an injection for a worn joint. US Food and Drug Administration, Center for Biologics Evaluation and Research — [MACI (autologous cultured chondrocytes on porcine collagen membrane)](https://www.fda.gov/vaccines-blood-biologics/cellular-gene-therapy-products/maci-autologous-cultured-chondrocytes-porcine-collagen-membrane). *FDA*, 2024. 5. Eighty patients with a single symptomatic chronic femoral condyle cartilage defect were randomized to autologous chondrocyte implantation or microfracture and followed 14-15 years. No significant difference in clinical scores emerged at long-term follow-up; there were 17 failures in the ACI group versus 13 in the microfracture group and more total knee replacements after ACI (6 versus 3). Fifty-seven percent of surviving ACI patients and 48% of surviving microfracture patients had radiographic early osteoarthritis (KL >=2). Knutsen G, et al. — [A Randomized Multicenter Trial Comparing Autologous Chondrocyte Implantation with Microfracture: Long-Term Follow-up at 14 to 15 Years.](https://pubmed.ncbi.nlm.nih.gov/27535435/). *The Journal of bone and joint surgery. American volume*, 2016. DOI: 10.2106/JBJS.15.01208. 6. The SUMMIT randomized trial treated 144 patients (mean age 33.8, mean lesion 4.8 cm2) with at least one symptomatic focal cartilage defect (Outerbridge III/IV, >=3 cm2) of the femoral condyle or trochlea. Matrix-applied characterized autologous cultured chondrocytes (MACI) improved KOOS pain (37.0 to 82.5) and function significantly more than microfracture (pain 35.5 to 70.9) at 2 years, with histological and MRI assessment of the repair tissue. This is what a positive cartilage-repair trial looks like - in young patients with a discrete hole, not a worn joint. Saris D, et al. — [Matrix-Applied Characterized Autologous Cultured Chondrocytes Versus Microfracture: Two-Year Follow-up of a Prospective Randomized Trial.](https://pubmed.ncbi.nlm.nih.gov/24714783/). *The American journal of sports medicine*, 2014. DOI: 10.1177/0363546514528093. 7. A 2025 systematic review of 1,125 patients receiving intra-articular injections for glenohumeral osteoarthritis reported a 7.2% overall complication rate and a 3.2% rate of proceeding to surgery. Hyaluronic acid showed consistent though modest benefit, while the evidence for ORTHOBIOLOGICS (PRP, bone marrow aspirate concentrate, mesenchymal stem cells) 'remains limited', mainly because of heterogeneity in design, outcomes and patient characteristics. Migliorini F, et al. — [Intra-articular injections for shoulder arthritis in adults: a systematic review.](https://pubmed.ncbi.nlm.nih.gov/41204311/). *Eur J Med Res*, 2025. DOI: 10.1186/s40001-025-03423-4. 8. The August 2025 AAOS Evidence-Based Clinical Practice Guideline on Management of Rotator Cuff Injuries issued 25 recommendations and 4 consensus statements. Among its updates it clearly RESTRICTS the use of platelet-rich plasma and marrow stimulation in rotator cuff repair, limits prolotherapy in full-thickness tears, establishes CT as an adjunctive imaging modality, and endorses early mobilization after repair of small-to-medium tears. Ye Y, et al. — [[Interpretation of the 2025 American Academy of Orthopaedic Surgeons (AAOS) on Management of Rotator Cuff Injuries Evidence-Based Clinical Practice Guideline].](https://pubmed.ncbi.nlm.nih.gov/41730726/). *Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi*, 2026. DOI: 10.7507/1002-1892.202511084. 9. FDA states plainly that no stem cell, exosome, stromal vascular fraction, umbilical cord blood, Wharton's jelly or amniotic-fluid product has been approved for the treatment of ANY orthopedic condition - it names osteoarthritis, tendonitis, disc disease, tennis elbow, back pain, hip pain, knee pain, neck pain and shoulder pain individually. The only FDA-approved stem cell products in the United States are cord-blood-derived blood-forming stem cells for disorders of the hematopoietic system, and there are currently no FDA-approved exosome products. US Food and Drug Administration, Center for Biologics Evaluation and Research — [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*, 2020. ## What is your next shoulder step? At the Chandler office, QC Kinetix offers regenerative care, meaning treatments prepared from part of your blood and intended to support repair. Clinic staff can examine your shoulder and discuss choices. They may find that different care fits better. Bring prior scans and notes listing your medicines. Note which movements make the soreness worse. You'll leave knowing which choices fit the exam. Book a free consultation: --- Plain help for soreness and easier movement. Shoulder regeneration Gilbert information on sore shoulders, simple care at home, signs needing attention, non-surgical choices, and the nearby Chandler clinic. Plain help for shoulder soreness, warning signs, and care near Gilbert. This site, including its recommendation of the Chandler location, is operated by the owners of the QC Kinetix Phoenix-area clinics; those owners benefit when a reader books a consultation. Copyright 2026 Gilbert Shoulder Field Notes. General shoulder education only; urgent symptoms need prompt medical care, and individual decisions require an examination.