What damaged joint cartilage means

A worn joint and one damaged area are different findings

Broad wear often brings an ache, stiffness and less comfortable movement. One damaged spot may cause swelling, catching or soreness in one place. Yet either finding can appear on a scan without causing trouble. During the exam, the person examining you bends the joint, checks strength and presses each sore area.

That exam can show whether bone, a tendon or another joint part may be involved. It also helps keep an unrelated scan finding from driving care.

QC Kinetix focuses on non-surgical soreness care

At the Chandler office, regenerative treatments are care done without surgery using material taken from a patient's body. The letters PRP mean platelet-rich plasma. Staff take a sample of your blood, spin it until platelets separate, and put that portion into the aching joint with a needle. Concentrated PRP has a higher platelet amount. Here, medical providers examine the joint and perform the care.

These choices aren't operations that move or cover cartilage. Ask what change in soreness is reasonable, since feeling better doesn't mean new cartilage formed.

Microfracture makes repair tissue rather than original cartilage

Microfracture is an operation that opens small holes in bone below joint damage. Blood and marrow cells from the soft center of bone then reach the damaged area. They form fibrocartilage, a tough patch that differs from the original smooth covering. An operation can still help some people without making original cartilage.

Surgical choices depend on the damage's size, depth and place in the joint. Recovery can take months before walking, lifting, work and other usual activity return.

The exam decides whether the scan finding matters

Take the scan report and point to the sore area. Say how long the joint has hurt. Name the movement that starts the soreness. Mention swelling, catching, locking and trouble standing on the joint. Earlier operations matter because they can affect later choices.

You don't need every tissue term before the visit. Ask which joint part likely hurts and why the suggested care fits.

Sources

1. Carbon-14 bomb-pulse dating of tibial plateau cartilage from 23 people born between 1935 and 1997 showed that virtually no replacement of the cartilage collagen matrix happens after skeletal maturity, and that neither osteoarthritis nor tissue damage changed that turnover rate. This is the measurement behind the statement that adult articular cartilage has almost no capacity for self-repair.

   Heinemeier KM, et al. — Radiocarbon dating reveals minimal collagen turnover in both healthy and osteoarthritic human cartilage.. Sci Transl Med, 2016. DOI: 10.1126/scitranslmed.aad8335.

2. At two years in the randomised trial of ACI versus microfracture in 80 patients, both groups improved significantly, and the microfracture group's SF-36 physical component score improved significantly MORE than the ACI group's. Biopsies were obtained from 84% of patients and blinded histological evaluation showed no significant difference between the two repair tissues, with no association between histological quality and clinical outcome.

   Knutsen G, et al. — Autologous chondrocyte implantation compared with microfracture in the knee. A randomized trial.. J Bone Joint Surg Am, 2004. DOI: 10.2106/00004623-200403000-00001.

3. The original autologous chondrocyte transplantation series treated 23 patients with full-thickness knee defects of 1.6 to 6.5 cm2. At two years, 14 of 16 femoral condyle transplants were good to excellent, but only 2 of 7 patellar transplants were excellent or good, three were fair and two poor, with two patellar cases needing reoperation. Location mattered from the very first paper.

   Brittberg M, et al. — Treatment of deep cartilage defects in the knee with autologous chondrocyte transplantation.. N Engl J Med, 1994. DOI: 10.1056/NEJM199410063311401.

4. Repair tissue removed at joint replacement from five patients whose marrow-stimulation procedure had failed was analysed by histology, polarised light microscopy, immunohistochemistry and biochemistry. The defects were mostly filled with FIBROCARTILAGINOUS tissue carrying small and large fissures; the subchondral bone was incompletely restored, a new tidemark was absent, and the tissue was more cellular than the cartilage next to it. This is what marrow stimulation actually builds.

   Kaul G, et al. — Failed cartilage repair for early osteoarthritis defects: a biochemical, histological and immunohistochemical analysis of the repair tissue after treatment with marrow-stimulation techniques.. Knee Surg Sports Traumatol Arthrosc, 2012. DOI: 10.1007/s00167-011-1853-x.

5. A meta-analysis of 29 second-look arthroscopy studies covering 586 ankles found cartilage-quality success of 57% (95% CI 48-65%) after bone marrow stimulation, versus 86% after fragment fixation, 91% after osteochondral transplantation and 80% after cartilage implantation techniques. Marrow stimulation was significantly worse than all three when someone actually looked inside the joint afterwards.

   Vreeken JT, et al. — Second-Look Arthroscopy Shows Inferior Cartilage after Bone Marrow Stimulation Compared with Other Operative Techniques for Osteochondral Lesions of the Talus: A Systematic Review and Meta-Analysis.. Cartilage, 2026. DOI: 10.1177/19476035241227332.

6. A JBJS evidence-based review of chondral lesions of the knee sets management by lesion size, location, limb alignment and rotation, and patient demand rather than by product: osteochondral autograft transfer is described as durable and predictable for smaller lesions (under 2 cm2) in young active patients, while lesions of 2 cm2 or more are typically treated with osteochondral allograft transplantation, particulated juvenile articular cartilage, or matrix-associated chondrocyte implantation, with favourable mid- and long-term results reported for allograft or MACI in large lesions of 3 cm2 or more.

   Dekker TJ, et al. — Chondral Lesions of the Knee: An Evidence-Based Approach.. J Bone Joint Surg Am, 2021. DOI: 10.2106/JBJS.20.01161.