# What to ask about joint soreness and repair *Joint Regeneration Phoenix | Joint Soreness Questions Answered* > Joint regeneration Phoenix answers on microfracture surgery, cartilage repair, scans, home care and finding a local clinic. ## Which joint treatment makes sense for me? Start by asking what is sore, when it began and what the exam found. One damaged cartilage area differs from wear across a joint. Relief still matters when a later scan looks the same. I'd use these answers to write questions for your visit. ## Sources 1. 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. 2. 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. 3. 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. 4. FDA's public list of licensed cellular and gene therapy products is the checkable answer to 'is this FDA-approved?'. A product not on that list, and not being administered under an active IND, is not an approved therapy however it is described in a brochure. For orthopedics the list is short and its cartilage entry is MACI, indicated for focal full-thickness knee defects. US Food and Drug Administration, Center for Biologics Evaluation and Research — [Approved Cellular and Gene Therapy Products](https://www.fda.gov/vaccines-blood-biologics/cellular-gene-therapy-products/approved-cellular-and-gene-therapy-products). *FDA*, 2026. 5. 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. 6. 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. 7. 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. ## What usually helps an aching joint? Gentle motion, lighter use and strength work often help common joint soreness. Cold or warmth might make your joint feel better too. If you aren't improving, get an exam before spending money on a procedure. ## What is microfracture surgery? It is an operation for one damaged cartilage spot, usually in a knee. The surgeon makes tiny openings in the bone so repair tissue can form. It isn't meant to restore a joint with wear spread throughout it. ## Can cartilage regenerate after years of wear? Worn cartilage doesn't simply grow back throughout an older joint. An operation can form repair tissue in one prepared spot, but that's different. Ask whether your aim is less soreness, easier motion or repair of a small damaged area. ## Will a scan explain why my joint hurts? A scan can show worn cartilage, worn bone or swelling, but it can't measure soreness. The doctor also needs to hear what you feel and examine the joint. Ask which worn area matches the exact place and motion that bother you. ## What is the best treatment for a worn joint? There isn't one best treatment for everyone. The cause, your health and the tasks you want back all matter. Ask what to try first, how long to try it and when another treatment makes sense. ## Where can I find regenerative medicine near me? Regenerative medicine is a name for care made from material from your own body. If soreness doesn't settle, you can request an exam at QC Kinetix at Banner Estrella, 9305 W. Thomas Road, Suite 460, Phoenix, AZ 85037. Bring old reports and ask what the exam suggests before discussing treatment. ## What to ask if it does not settle QC Kinetix offers regenerative treatments, a name for non-surgical care made from your own blood. PRP means blood that's spun to gather more platelets. Concentrated PRP is prepared to gather an even higher amount of platelets. Medical providers, meaning the trained people giving your care, prepare and provide it in a clinic for soreness due to a joint condition. These treatments aren't a promise that worn cartilage will grow back. Your first talk covers the sore joint, earlier care and the activity you miss most. Ask about the likely visit count, full cost and work needed afterward. Then you'll be able to decide without being rushed. Schedule a free consultation: --- Plain help for soreness, care at home and a useful visit. Joint regeneration Phoenix: why your joint may ache, ways to ease it yourself and when a visit makes sense. Simple guidance on aching joints, care at home, urgent signs and useful visit questions. This site is run by the Phoenix-area clinic owners of QC Kinetix. The business benefits when readers book, so the relationship is stated plainly and the signed research sources remain visible for checking. Copyright 2026 Phoenix Joint Field Guide. General health education only; a clinician who can examine the joint should guide personal medical decisions.