Cartilage Repair
Cartilage Repair - Related Videos
02:25
Overview of DNA Repair
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2020
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage. Chemically...
12:37
3D Hydrogel Scaffolds for Articular Chondrocyte Culture and Cartilage Generation
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Cited by 38 •
2015
Cartilage repair represents an unmet medical challenge and cell-based approaches to engineer human articular cartilage are a promising solution. Here, we describe three-dimensional (3D) biomimetic hydrogels as an ideal tool for the expansion and maturation of human articular chondrocytes.
02:27
Safranin-O Staining: A Method to Visualize the Structural Integrity and Cellularity of Cartilage
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2025
In this video, we demonstrate a staining procedure for cartilage using safranin-orange. This method helps visualize the cartilage and detect any damage.
01:54
Base Excision Repair
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2020
One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template. The first step of...
08:58
Matrix-assisted Autologous Chondrocyte Transplantation for Remodeling and Repair of Chondral Defects in a Rabbit Model
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Cited by 5 •
2013
An experimental technique for the treatment of chondral defects in the rabbit's knee joint is described. The implantation of autologous chondrocytes seeded on a matrix is a well-accepted method for the remodeling and repair of articular cartilage lesions providing satisfying long-term results. Matrix-assisted autologous chondrocyte transplantation (MACT) offers a standardized and clinically established implantation method.
FAQs
Cartilage repair faces a biological limitation: articular cartilage is largely avascular, so access to circulating repair resources is restricted, and it contains relatively few chondrocytes, the resident cells associated with cartilage maintenance. These features help explain why damage may persist and why treatments often add cells, graft tissue, or regenerative stimuli.
These approaches differ in what supplies the proposed repair response. Microfracture may stimulate marrow-derived cells, while grafting places replacement tissue in the damaged area. Cell-based strategies introduce cells, and biomaterial-based methods provide a supporting setting for new extracellular matrix formation. This distinction explains why cartilage repair includes both established clinical techniques and emerging regenerative designs.
New extracellular matrix formation is central because it provides the structural material associated with cartilage tissue. Strategies that support matrix production therefore seek more than short-term symptom relief: they aim for repair that is biologically integrated and durable. This focus connects cell delivery and biomaterials with the longer-term goal of restoring joint function.
Microfracture occupies a marrow-stimulation role among clinical cartilage-repair options. Its intended contribution is to stimulate marrow-derived cells rather than directly replace the damaged surface with a graft. That makes it mechanistically distinct from osteochondral grafting and from approaches centered on implanted chondrocytes or biomaterials. It is an example of biologic stimulation.
Clinical options span different repair concepts. Osteochondral grafting replaces damaged tissue with grafts, whereas autologous chondrocyte implantation centers on implanting chondrocytes. Emerging tissue-engineering methods may deliver cells together with biomaterials that support new extracellular matrix formation. Comparing these approaches shows how cartilage repair can replace tissue, add cells, or create a regenerative environment.
The clinical value of cartilage repair is assessed against several connected goals: reducing pain, improving joint function, and delaying osteoarthritis or joint replacement. These aims explain why the field includes both established procedures and emerging regenerative methods. A strategy is relevant not only for its biological mechanism but also for whether it supports meaningful joint function over time.