# Common questions about joint care get straight answers *Straight Answers | Biologic Therapy Gilbert* > Biologic therapy Gilbert questions answered simply, including orthobiologics, PRP, BMAC, cost, soreness, and nearby care. Which questions matter before joint treatment? Most people want to know what is taken, where it goes, and what it costs. These short answers also explain blood, marrow, and warning signs. You can take the same questions to a clinic visit. ## Sources 1. The 2025 Cochrane review of stem cell injections for knee osteoarthritis pooled 25 randomised trials (1,341 participants) and found that, compared with placebo injection, stem cell injection MAY slightly improve pain (1.2 points better on a 0-10 scale, 7 studies, 445 participants) and function (14.2 points better on a 0-100 scale, 7 studies, 432 participants) up to six months - both rated LOW-certainty evidence, downgraded for indirectness (cell source, preparation and dose varied across studies) and suspected publication bias, since up to three larger RCTs were conducted and withdrawn before reporting results. Radiographic progression was not assessed in any included study. Whittle SL, et al. — [Stem cell injections for osteoarthritis of the knee.](https://pubmed.ncbi.nlm.nih.gov/40169165/). *Cochrane Database of Systematic Reviews*, 2025. DOI: 10.1002/14651858.CD013342.pub2. 2. The largest head-to-head trial of cell-based orthobiologics to date randomised 480 patients with KL II-IV knee OA across four arms: autologous bone marrow aspirate concentrate, autologous adipose stromal vascular fraction, allogeneic umbilical cord tissue-derived MSCs, and a corticosteroid injection control. At 12 months NONE of the three orthobiologic injections was superior to another or to the corticosteroid control on either co-primary endpoint (VAS pain, KOOS pain), and none of the four groups showed a significant change in MRI osteoarthritis score from baseline. No procedure-related serious adverse events were reported. 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. The companion ESSKA-ORBIT consensus on cell-based therapy (77 experts, 22 countries, 27 statements) found only 5 of 27 statements reached recommendation level A or B; 22 were rated C or D. It concluded that cell-based therapy shows clinical benefit in pain and function up to 12 months for KL grades 1-3 with some benefit in selected KL 4, but that because of limited high-quality studies and NO clear superiority over other injectables it should be considered a SECOND-LINE option, after other non-operative treatment fails. de Girolamo L, et al. — [The use of injectable orthobiologics for knee osteoarthritis: A formal ESSKA-ORBIT consensus. Part 2-Cell-based therapy.](https://pubmed.ncbi.nlm.nih.gov/40923345/). *Knee Surgery, Sports Traumatology, Arthroscopy*, 2025. DOI: 10.1002/ksa.70001. 4. A meta-analysis of 27 Level I studies (1,042 PRP, 226 BMAC, 1,128 HA patients) found significantly better post-injection WOMAC, VAS and subjective IKDC scores for BOTH PRP and BMAC compared with hyaluronic acid - and NO significant difference between PRP and BMAC on any outcome score. This is the clearest published statement that the two most-marketed orthobiologics perform the same as each other in the knee. Belk JW, et al. — [Patients With Knee Osteoarthritis Who Receive Platelet-Rich Plasma or Bone Marrow Aspirate Concentrate Injections Have Better Outcomes Than Patients Who Receive Hyaluronic Acid: Systematic Review and Meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/36913992/). *Arthroscopy*, 2023. DOI: 10.1016/j.arthro.2023.03.001. 5. A randomized trial allocated 175 patients with KL II-IV knee OA to BMAC (n=111), PRP (n=34) or hyaluronic acid (n=30) and followed them for 12 months. All three produced significant improvement from baseline in WOMAC, KOOS and IKDC with no serious side effects; BMAC showed significantly better clinical improvement than PRP and HA on most scores, and PRP scored higher than HA without reaching statistical significance. Note the unequal, non-blinded design - this is the strongest direct BMAC-versus-PRP randomized comparison available, and it is not a strong design. Dulic O, et al. — [Bone Marrow Aspirate Concentrate versus Platelet Rich Plasma or Hyaluronic Acid for the Treatment of Knee Osteoarthritis.](https://pubmed.ncbi.nlm.nih.gov/34833411/). *Medicina (Kaunas)*, 2021. DOI: 10.3390/medicina57111193. 6. In a within-patient placebo-controlled trial, 25 people with BILATERAL knee osteoarthritis received bone marrow aspirate concentrate in one knee and saline in the other, acting as their own controls. Pain scores fell significantly from baseline in BOTH knees at 1 week, 3 months and 6 months, and the relief - described by the authors as dramatic - did not differ significantly between the BMAC knee and the saline knee. Shapiro SA, et al. — [A Prospective, Single-Blind, Placebo-Controlled Trial of Bone Marrow Aspirate Concentrate for Knee Osteoarthritis.](https://pubmed.ncbi.nlm.nih.gov/27566242/). *American Journal of Sports Medicine*, 2017. DOI: 10.1177/0363546516662455. 7. A meta-analysis of 6 RCTs (860 patients, 334 receiving BMAC) found overall complication rates of 41.91% for BMAC versus 41.25% for comparator injectables (P=0.85), with knee effusion the commonest BMAC complication at 18.26%. Early and late complication rates did not differ significantly from HA, steroids, PRP, SVF, MSC or saline. The number needed to harm for BMAC relative to other injections was 152. Fucaloro S, et al. — [Complication rates of bone marrow aspirate concentrate injections versus other injectable therapies for knee osteoarthritis: A systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/39473874/). *Journal of Orthopaedics*, 2025. DOI: 10.1016/j.jor.2024.10.005. 8. A randomized controlled trial compared a SINGLE ultrasound-guided injection of leukocyte-rich PRP (n=30) with micro-fragmented adipose tissue (n=28) in KL 1-4 knee OA. Both groups improved clinically meaningfully from baseline, and there was no significant difference in the primary outcome (KOOS-Pain at 6 months: 80.38 vs 81.61; P=.67) or in any other score - despite MFAT requiring a lipoaspiration procedure and PRP requiring only a blood draw. Baria M, et al. — [Platelet-Rich Plasma Versus Microfragmented Adipose Tissue for Knee Osteoarthritis: A Randomized Controlled Trial.](https://pubmed.ncbi.nlm.nih.gov/36147791/). *Orthopaedic Journal of Sports Medicine*, 2022. DOI: 10.1177/23259671221120678. 9. A systematic review of 33 clinical studies of minimally manipulated adipose tissue products for knee OA - of which only 7 were randomized - meta-analysed the 5 RCTs that compared adipose products directly with PRP and found COMPARABLE results between them. The authors explicitly flagged the limits of the literature: few high-level trials and overall low quality. Veronesi F, et al. — [Adipose Tissue-Derived Minimally Manipulated Products versus Platelet-Rich Plasma for the Treatment of Knee Osteoarthritis: A Systematic Review of Clinical Evidence and Meta-Analysis.](https://pubmed.ncbi.nlm.nih.gov/38202074/). *Journal of Clinical Medicine*, 2023. DOI: 10.3390/jcm13010067. 10. FDA's July 2020 final guidance 'Regulatory Considerations for Human Cells, Tissues, and Cellular and Tissue-Based Products: Minimal Manipulation and Homologous Use' is the document that decides whether a given orthobiologic can be used without a licence: an HCT/P may be regulated solely under section 361 only if it is minimally manipulated AND intended for homologous use, among other criteria; otherwise it is a drug or biological product requiring an approved licence or an active investigational new drug application. U.S. Food and Drug Administration — [Regulatory Considerations for Human Cells, Tissues, and Cellular and Tissue-Based Products: Minimal Manipulation and Homologous Use - Guidance for Industry and Food and Drug Administration Staff](https://www.fda.gov/regulatory-information/search-fda-guidance-documents/regulatory-considerations-human-cells-tissues-and-cellular-and-tissue-based-products-minimal). *FDA Guidance Document*, 2020. ## What are orthobiologics? Orthobiologics may use your arm-drawn blood or pelvic marrow. Others use body fat or tissue from a donor. These choices don't all work the same way. Ask exactly what the clinic would take and place near your joint. ## Is BMAC better than PRP for a sore knee? Research hasn't shown a clear winner. BMAC uses pelvic marrow that is taken and spun before use. PRP is arm-drawn blood spun to keep more small blood pieces called platelets. Many knee studies found similar changes in soreness and movement. ## Does the BMAC procedure hurt? BMAC includes taking marrow from your pelvis, so it isn't an arm draw. People feel that part differently, and no website can predict your discomfort. Ask how the clinic handles pelvic soreness afterward. You'll have a clearer idea of the first few days. ## When does joint soreness need medical care? Make a regular appointment when soreness keeps limiting sleep or movement. A hot, red, swollen joint or fever needs faster care. Get help after a fall if you can't bear weight. New weakness or bladder trouble with back pain is urgent. ## How much does biologic joint care cost in Arizona? Biologic care means treatment using body material, such as blood or marrow. You'll need a written total because patients often pay the clinic themselves. Ask what the charge covers and how many visits may follow. Another person's price isn't your quote. ## What belongs on my clinic question list? Ask what will be taken from you and where it will be placed. Get the expected recovery, visit count, cost, and other choices. Don't leave without knowing who gives the treatment. QC Kinetix offers consultations through medical providers, meaning clinicians who examine you before discussing regenerative care made from prepared blood or other body material. ## Bring the questions that matter to you Bring the name of your sore joint and when it bothers you. Add old images and a list of medicines. QC Kinetix can discuss non-surgical choices, but it can't promise relief. Book a free consultation: --- Know what comes from your body before you choose. Help with Gilbert joint soreness, home care, prepared-blood treatments, and the nearby clinic. Help for Gilbert joint soreness, home care, and nearby choices. This site is operated by the owners of the QC Kinetix Phoenix-area clinics, who benefit when readers book with their clinic business. © 2026 The Gilbert Biologic Guide. General education only; personal decisions require evaluation by a qualified medical professional.