Knee conditions

Cartilage Repair & Restoration

Treating damage to the smooth surface that lines the knee joint.

Articular cartilage is the smooth white surface that lines the ends of the bones inside the knee. It has very little blood supply of its own, which is why damage to it is treated differently from an injury to a ligament or a bone.

A teenage athlete clearing a hurdle on a track

Why cartilage is treated on its own terms

Cartilage damage in a child can follow a single injury — a kneecap dislocation that shears off a fragment, for example — or accompany a condition such as osteochondritis dissecans.

Because the tissue does not simply knit back together the way bone does, the goal is to restore a durable joint surface rather than to remove the damaged area.

How Dr. Green decides between surgery and non-surgical treatment

How Dr. Green treats damaged knee cartilage

  • Cartilage repair and restoration proceduresListed in Dr. Green’s own special-expertise list as one of the areas he treats in the knee.
  • Treatment of osteochondral fragmentsAddressing fragments of cartilage with underlying bone, which often accompany patellar dislocation and OCD.
5 peer-reviewed papers on knee cartilage

Dr. Green's published research on cartilage repair

Of the papers indexed on PubMed under Dr. Green’s Hospital for Special Surgery affiliation, 5 are on this subject.

See the full publication record

The papers themselves

His 5 papers on this subject, indexed on PubMed under his Hospital for Special Surgery affiliation. Each opens on PubMed.

  1. The Number of Patellar Dislocation Events Is Associated With Increased Chondral Damage of the Trochlea The American journal of sports medicine · 2024 Aug · Dr. Green is author 3 of 11
  2. Male sex is an independent risk factor for patellar osteochondral fractures following acute patellar dislocation in pediatric patients Journal of experimental orthopaedics · 2023 Aug 26 · Dr. Green is author 5 of 5
  3. Medial patellofemoral ligament reconstruction with simultaneous osteochondral fracture fixation is an effective treatment for adolescent patellar dislocation with osteochondral fractures Journal of children's orthopaedics · 2022 Oct · Dr. Green is author 4 of 4
  4. Patellofemoral joint cartilage restoration with particulated juvenile allograft in patients under 21 years old The Knee · 2022 Jun · Dr. Green is author 9 of 9
  5. Magnetic resonance evaluation of the pediatric knee after arthroscopic fixation of osteochondral lesions with biodegradable nails Skeletal radiology · 2020 Jan · Dr. Green is author 2 of 4

Patients Dr. Green has treated for this condition

The Hospital for Special Surgery publishes these accounts in its Back in the Game archive. All 3 list Dr. Green as the treating surgeon. Each has its own page here, cited back to hss.edu.

Scott Perry Osteochondritis Dissecans of the Knee Scott Perry West Palm Beach, FL Read Scott’s story Jack Osteochondritis Dissecans of the Knee Jack Chappaqua, NY Read Jack’s story Matthew Howe Osteochondritis Dissecans of the Knee Matthew Howe Hopewell Junction, NY Read Matthew’s story
All 31 patient stories

Questions parents ask

How does cartilage get damaged in a child?

Commonly through a kneecap dislocation that shears a fragment off the joint surface, or alongside a condition such as osteochondritis dissecans.

Is cartilage damage the same as arthritis?

No. Arthritis is a progressive wearing of the joint surface; what is treated here is focal damage in a young knee.