MACI Cartilage Repair

If your MRI shows a focal cartilage defect on the femoral condyle, trochlea, or patella — or you have been told the only options are pain management or early joint replacement — the question worth asking is whether the rest of your joint is still healthy enough to repair the defect rather than replace the joint. For active patients, particularly under 55, with focal damage and a knee that can be made stable, aligned, and meniscus-protected, the answer is often yes — and MACI is one of the most well-studied, FDA-approved cartilage restoration procedures available today.

This page is the sub-specialty hub for MACI cartilage repair. It pairs with the cartilage transplant (OATS & allograft) page for patients whose lesion size or depth points to a different cartilage operation, and with joint preservation and osteotomy for the realignment side of cartilage protection. Here we cover what cartilage damage is and why it does not heal on its own, who is and is not a MACI candidate, the two-stage protocol in detail, the lesion-size based decision tree (microfracture vs. MACI vs. OATS vs. osteochondral allograft), when MACI is combined with TTO / HTO / DFO / MPFL / ACL / meniscus work, the cartilage-first philosophy that drives Dr. Strickland's practice, prehabilitation, the surgical days, the long recovery, the risks, common patient concerns, insurance and cost, emerging cartilage-repair options, and when to seek a sub-specialty second opinion.

What Cartilage Damage Is and Why It Matters

The articular cartilage in your knee is the thin, glassy white layer that covers the ends of the femur, the top of the tibia, and the back of the patella. It is what allows the joint to glide smoothly through tens of millions of cycles over a lifetime. It is also one of the only tissues in the body that does not heal itself when injured. There are no blood vessels in articular cartilage and the cells inside it (chondrocytes) cannot migrate to a wound to repair it. A full-thickness cartilage defect — a hole through the cartilage layer down to bone — will not fill in on its own. Left untreated, the surrounding cartilage progressively wears, the lesion enlarges, and the bone exposed at the base of the defect becomes a pain generator.

This is the central biological fact that drives the cartilage-repair field. Microfracture, MACI, OATS, and osteochondral allograft each take a different approach to the same problem: how to fill a non-healing hole in a tissue that cannot fill itself. The answers differ in what tissue is produced and how durable it is. Microfracture relies on bone-marrow elements from the underlying bone to form fibrocartilage — a short-term answer but biomechanically inferior to native cartilage. MACI implants chondrocytes — the actual cells that make hyaline cartilage — and over 12 to 18 months produces hyaline-like repair tissue that is structurally and functionally closer to what was originally there. OATS and osteochondral allograft transplant a plug of mature cartilage with attached subchondral bone, replacing both the cartilage and the bone in one stage.

Cartilage damage matters because cartilage loss is progressive. A focal full-thickness defect today, untreated and left in a malaligned or unstable knee, becomes a larger lesion in two years and incipient compartment arthritis in five. The cartilage-first philosophy — addressing focal damage early, while the rest of the joint is still healthy — is grounded in this biological reality. Dr. Strickland has framed it directly in her published article "Why I Would Rather Repair Cartilage Than Replace a Knee."

How Cartilage Damage Feels

Patients with focal cartilage damage often describe a combination of symptoms that other knee problems do not produce in quite the same way:

• Mechanical pain with loaded activities — pain when squatting, descending stairs, getting up from a chair, or pivoting. The pain is often described as deep, aching, and located beneath the kneecap or in a specific compartment of the knee depending on lesion location
• Catching, clicking, or a sense that something is moving — loose chondral flaps and unstable lesion edges can produce mechanical symptoms, sometimes the dominant complaint
• Swelling after activity — effusions are common after sport, after a long walk, or after work that involves squatting or kneeling
• Buckling or "giving way" — not a true ligament instability, but a reflex inhibition of the quadriceps when the painful spot is loaded. The leg feels like it cannot hold weight
• Pain that is worse with cold weather or after sitting — many patients notice that the first few minutes of walking after sitting are the worst
• A specific point of pain that the patient can map — unlike diffuse arthritis, focal damage is often pinpoint. Patients can put their finger on it

Patients with patellar or trochlear lesions tend to describe the pain as anterior — behind or around the kneecap, worse with stairs, prolonged sitting (the "theater sign"), and squatting. Femoral condyle lesions tend to produce medial or lateral compartment pain, sometimes with a sensation of catching when the lesion is loaded in flexion. New mechanical symptoms after a twisting injury, particularly in a younger patient, can indicate an osteochondral fragment that has separated — an indication for MRI and often for arthroscopic evaluation. Many patients have had pain for months or years before a clear focal lesion is identified on imaging.

Who Is a MACI Candidate?

The "right patient for MACI" is more specific than the "right patient for cartilage repair" in general. Six conditions need to line up — and in most cases, when one or two of them are missing, the answer is not "MACI is off the table" but "MACI plus the appropriate concurrent procedure to fix the missing piece." Lesion-by-lesion judgment is what cartilage sub-specialty surgery is.

Patients who are not MACI candidates as primary monotherapy include those with diffuse multi-compartment arthritis, untreated bipolar (kissing) lesions on opposing surfaces of the same compartment, uncorrectable malalignment, active inflammatory arthritis, and large defects with significant subchondral bone loss — the last group is generally better served by osteochondral allograft. Lesion candidacy is informed by Dr. Strickland's published outcomes review of cartilage restoration procedures and her technical note on treatments of patellar chondral lesions.

The Two-Stage MACI Protocol

The two stages of MACI — biopsy, cell culture, implantation — are what make it different from any single-stage cartilage procedure. The biology in between the two surgeries is also why MACI demands careful patient selection: you commit to two operations, six weeks of cell culture, and a long rehab before you see a result.

Stage 1: The Arthroscopic Biopsy

Stage 1 is a standard knee arthroscopy with a chondroplasty to clean up loose flaps of cartilage at the site of planned cartilage repair. Through standard arthroscopic portals, Dr. Strickland inspects the entire joint, confirms the lesion seen on MRI, characterizes the surrounding cartilage, assesses meniscus integrity and ligament stability, and identifies any other findings that affect the stage 2 plan. From a non-weight-bearing area — typically the intercondylar notch or the superolateral trochlea — she harvests roughly 200 to 300 milligrams of healthy cartilage. The biopsy site is small enough that it heals without affecting joint function. The harvested cartilage is placed in transport media and shipped to Vericel.

Recovery from stage 1 is straightforward. Most patients are walking the same day, off crutches within a few days, and back to most non-impact daily activities within one to two weeks. Range of motion is typically full within a few weeks. Stage 1 is the easy operation in the MACI sequence.

The Cell-Culture Interval

The 4-to-6-week interval between stages is for the chondrocytes to be expanded in Vericel's specialized lab. The chondrocytes are isolated from your cartilage biopsy, expanded in tissue culture under GMP conditions, and seeded onto a porcine type I/III collagen membrane. The end product is a sterile, cell-loaded biological patch labeled and shipped specifically for your operation.

From your standpoint, the interval is also when prehabilitation matters most — quadriceps and hip-stabilizer strengthening, range-of-motion work, and addressing any swelling or inhibition before stage 2. We schedule the stage 2 implantation around the timing of cell delivery from the lab.

Stage 2: The Open Implantation

Stage 2 is the operation that puts the cells back. Through a small mini-arthrotomy positioned over the lesion, the defect is exposed and debrided to clean stable vertical walls of healthy cartilage. The base of the defect is prepared so the calcified cartilage layer is preserved or selectively curetted depending on lesion location and depth. The membrane is then cut to the exact shape and size of the defect, and secured cell-side down into the defect with fibrin sealant. The knee is taken through a careful range-of-motion check to confirm the graft is stable and does not displace.

Concurrent procedures performed at the same operation when indicated include AMZ-TTO for patellar maltracking, HTO for varus alignment with a medial femoral condyle defect, DFO for valgus alignment with a lateral femoral condyle defect, MPFL reconstruction for patellar instability, meniscus repair or transplant, and ACL reconstruction for ligament instability. These concurrent procedures lengthen the operation and adjust the rehab plan, but they are often what makes the cartilage repair durable. A pristine MACI in a malaligned, unstable, or meniscus-deficient knee is a repair built on a faulty foundation.

For the published outcomes data on MACI specifically, see Dr. Strickland's follow-up study of MACI cartilage transplantation patients, the broader outcomes review of cartilage restoration procedures, and her CartiHEAL / OCA / MACI clinical comparison.

MACI vs. OATS vs. Osteochondral Allograft vs. Microfracture

MACI is one of four main cartilage-restoration options. The right choice depends on the size and depth of the defect, whether the underlying bone is involved, the location in the knee, and the patient's goals. Lesion-size based decision-making is the heart of cartilage sub-specialty practice.

For chondral-only defects in the 2–10 cm² range — the most common scenario — MACI gives the best balance of cartilage quality, durability, and applicability. For smaller defects, OATS or chondroplasty may be reasonable. For very large defects or defects with bone loss, an osteochondral allograft is usually the right call. Recent imaging-based research has identified subchondral bone marrow edema as a risk factor for osteochondral allograft failure — a refinement that informs how we follow allograft cases on MRI. See the cartilage transplant page for the full OATS and allograft discussion. For broader joint-preservation context — including when osteotomy is part of the cartilage plan — see joint preservation and osteotomy.

Lesion-by-lesion decision-making also depends on bipolar lesions, location (femoral vs. trochlear vs. patellar; cartilage repair on the patella has historically been more difficult than on the femoral condyle), prior cartilage surgery, and patient activity goals. Two patients with apparently similar imaging can end up with different operations because of these contextual factors.

Concurrent Procedures: TTO, HTO, DFO, MPFL, Meniscus, ACL

This is one of the most under-explained ideas in cartilage repair: cartilage repair in a malaligned, unstable, or meniscus-deficient knee will not last. The same forces that destroyed the original cartilage will destroy the repair, often within a few years. Dr. Strickland's technical note on treatments of patellar chondral lesions states it directly: "correcting patellar malalignment and instability is critical for the success of cartilage repair procedures… we recommend that TTO and MPFL reconstruction be performed with MACI procedures of the patella when the anatomic pathology and pertinent patient history are present." The same logic applies across the joint:

• MACI + HTO (high tibial osteotomy) — for medial femoral condyle defects in patients with varus alignment. The HTO redistributes load away from the medial compartment and protects the cartilage repair
• MACI + DFO (distal femoral osteotomy) — for lateral femoral condyle defects in patients with valgus alignment. Mirror-image logic to HTO
• MACI + AMZ-TTO (Fulkerson osteotomy) — for patellar or trochlear defects in patients with patellar maltracking. Anteromedialization tibial tubercle osteotomy offloads the damaged facet of the patella
• MACI + MPFL reconstruction — for patellar or trochlear defects in patients with patellar instability. The MPFL stabilizes the kneecap so it stops dislocating onto the repair. See the podcase on patellofemoral instability and cartilage lesions and understanding patellofemoral instability and cartilage lesions for the combined-pathology framing
• MACI + meniscus repair or meniscus transplant — for chondral defects in a meniscus-deficient compartment. Without a functional meniscus, contact pressures across the repair exceed what hyaline-like cartilage can tolerate
• MACI + ACL reconstruction — for chondral defects in an ACL-deficient knee. The ACL keeps the cartilage repair from being subjected to abnormal shear during pivot and cut

These combinations are common, not rare. A meaningful percentage of MACI patients in Dr. Strickland's practice have at least one concurrent procedure, often planned in the same operation. In the patellofemoral population specifically, treating patellofemoral arthritis with patellar instability almost always means addressing both pathologies together. The technical refinement — assessment of patellar vascularity after patellar cartilage restoration via lateral parapatellar approach — is a sub-specialty consideration when MACI is performed on the patella.

Why Cartilage Repair Beats Replacement (When Possible)

The cartilage-first philosophy is the framework that drives Dr. Strickland's approach to focal cartilage damage in younger active patients. Her published article "Why I Would Rather Repair Cartilage Than Replace a Knee" lays out the case directly: for active patients with focal full-thickness damage and otherwise reasonable joint health, the goal is to preserve the native knee. A partial or total knee replacement in a 30- or 40-year-old commits the patient to a revision conversation in their lifetime — modern implants do not last forever, and revision arthroplasty is more complex than primary.

The clinical implications are concrete:

• A 32-year-old with a 4 cm² focal trochlear chondral defect and mild patellar maltracking is a candidate for combined MACI plus AMZ-TTO at one operation, not partial knee replacement at 32 followed by total knee replacement at 50 followed by revision at 65
• A 40-year-old runner with a 6 cm² focal medial femoral condyle defect and mild varus is a candidate for MACI plus HTO, not unicompartmental knee replacement
• A 35-year-old with a recurrent patellar dislocation and an associated trochlear cartilage defect is a candidate for MPFL reconstruction plus MACI, not for early patellofemoral arthroplasty

Replacement is the right answer for the right patient — the 65-year-old with bone-on-bone medial compartment arthritis is a unicompartmental or total knee candidate, not a cartilage-repair candidate. The cartilage-first framework is about identifying the patients for whom repair is technically feasible and biologically appropriate, and not committing them to an implant when their joint can still be preserved. Dr. Strickland's broader cartilage-repair commentary is captured in her AOSSM Sports Doc podcast on challenging cartilage injuries and the related live AOSSM 2023 podcast with Dr. Seth Sherman.

Prehabilitation Before MACI

The four-to-six-week interval between stage 1 and stage 2 is also a structured prehabilitation window. Patients who walk into stage 2 with a strong quadriceps, full range of motion, and no effusion recover faster and meet rehabilitation milestones more reliably than patients who walk in with a stiff, weak, swollen knee. Prehabilitation focuses on:

• Quadriceps activation and strengthening — closed-chain in pain-free range, with attention to the VMO. The single most predictive factor for early post-operative recovery
• Hip-stabilizer strengthening — abductors and external rotators. Particularly important for patellar and trochlear lesion patients
• Range of motion — prone heel-hangs, supine wall-slides, and stationary bike. A knee that goes into stage 2 with full extension recovers extension faster after
• Effusion management — elevation, compression, and load management to minimize a chronic effusion that inhibits the quadriceps
• Cardiovascular fitness — cycling and pool work where pain-free, to maintain general conditioning during the cell-culture interval
• Education and expectation-setting — reviewing the rehab protocol, the brace and CPM logistics, and the realistic timeline before the implantation rather than after

Patients who do this work are easier to rehabilitate after stage 2. Patients who skip it spend the first six weeks of post-operative rehab catching up on what they could have done before surgery. The prehabilitation window is one of the under-used advantages of MACI's two-stage structure.

What to Expect — Two Surgical Days

Stage 1: Day-of Experience

• Arrival and pre-op — you arrive a couple of hours before the procedure for intake, change into a gown, and meet the anesthesia team
• Anesthesia — regional anesthesia (a spinal block with sedation).
• Surgery — the arthroscopic biopsy and joint inspection takes roughly 30 to 45 minutes
• Recovery and home — you wake up with a soft dressing, weight-bearing as tolerated. Home the same day. Return to most non-impact daily activities within 1 to 2 weeks

Stage 2: Day-of Experience

• Arrival and pre-op — same intake process. The cell-loaded membrane is delivered from Vericel and confirmed labeled to you on the OR day
• Anesthesia — regional anesthesia
• Surgery — the open implantation takes roughly 1 to 2 hours, longer if concurrent procedures (TTO, HTO, DFO, MPFL, meniscus, ACL) are part of the operation
• Recovery room — you wake up in a hinged knee brace locked in extension, with the leg numb from the regional block. Continuous passive motion (CPM) machine is initiated the same day or the next morning
• Going home — you go home with the brace, crutches, ice, prescribed medications, and clear written instructions including the CPM schedule. A responsible adult must drive you home
• First 48 hours — ice, elevation, prescribed pain medications, regular CPM use, and gentle motion as instructed. The block typically wears off over 12 to 24 hours; weight-bearing is touch-down only with the brace and crutches

Cold-compression devices and quadriceps muscle stimulators (when prescribed) help reduce swelling and support muscle reactivation in the first weeks. CPM use is not optional — the maturing cartilage genuinely benefits from continuous passive motion in the early phase.

Recovery Timeline

MACI rehab is among the longer cartilage-repair recoveries because the implanted cells need biological time to mature into functional cartilage. Pushing too fast risks disrupting the maturing repair. The biology drives the timeline.

Most patients are back to daily activities and low-impact exercise (cycling, swimming, walking) well before they are cleared for full sport. The constraint is the maturing cartilage, not how the leg feels — many patients feel like the knee is "back to normal" at 4 to 6 months but are still 6 to 12 months away from running and a year or more from pivot sport. Concurrent procedures (TTO, HTO, DFO, MPFL, ACL, meniscus) extend or modify the protocol; the rehab plan is individualized.

Across all phases, the two factors that most consistently slow recovery are inconsistent physical therapy attendance and rushing back to high-impact activity before clearance. The patients who do well with MACI are the patients who treat the rehab as seriously as the surgery.

Risks of MACI

MACI is well-established with a long published track record — over 25 years of clinical experience with the autologous chondrocyte concept and over a decade with the matrix-induced (membrane) variant. Outcomes in well-selected patients are generally good, but no surgery is risk-free. Risks reviewed at consultation include:

• Incomplete graft incorporation or graft failure — highest when concurrent malalignment, instability, or meniscal status was not addressed; lower when the foundational issues were corrected at the same operation
• Graft hypertrophy — overgrowth of the repair tissue into the joint, occasionally requiring an arthroscopic debridement procedure 6 to 12 months later
• Persistent pain or incomplete relief — particularly when there were multiple pain generators that were not all addressed
• Stiffness or arthrofibrosis — reduced by prehabilitation, early CPM use, and structured PT; managed with manipulation under anesthesia or arthroscopic lysis if it occurs
• Infection — uncommon. Stage 1 arthroscopy infection rate is very low; stage 2 open implantation has a slightly higher but still low infection risk
• Tibial tubercle nonunion or hardware irritation — specific to combined AMZ-TTO; rare but can require hardware removal
• Osteotomy nonunion or malunion — specific to combined HTO or DFO; managed with revision technique when it occurs
• Blood clot (DVT or pulmonary embolism) — risk is mitigated by early mobilization (CPM helps) and individualized prophylaxis
• Anesthesia-related risks — nausea, sore throat, rare allergic reactions, transient nerve irritation from the regional block
• Need for additional surgery — for graft hypertrophy, hardware removal after osteotomy, or for revision cartilage surgery if the index repair fails
• Incomplete return to prior level of activity — some patients do not return to their prior level of sport even with technically excellent surgery and complete rehab
• Long-term durability is variable — MACI typically produces durable improvement at 5- and 10-year follow-up in published series, but the literature is honest that the repair tissue is not as durable as native cartilage indefinitely. Outcomes are not a permanent fix and do depend on patient factors

The single biggest predictor of a poor outcome is patient selection. The second is failing to address concurrent problems (alignment, ligament, meniscus) at the time of MACI. When the conditions line up and the patient does the rehab, MACI is one of the more successful joint-preserving operations performed in orthopedics today.

Common Patient Concerns

The friction-log: the four concerns we hear most often from patients considering MACI, with honest answers.

Insurance and Cost

MACI is FDA-approved for full-thickness articular cartilage defects of the knee in adults. Coverage and cost specifics:

• Most major commercial plans, Medicare, and many self-funded and union plans cover MACI when medical-necessity criteria are met. The criteria typically include documentation of failed conservative care, MRI-confirmed full-thickness defect, lesion size and grade, and an appropriate operative plan
• Pre-authorization is required and can take weeks. Our office and Vericel coordinate the documentation
• Your out-of-pocket cost depends on plan-specific factors — deductible, coinsurance, in-network or out-of-network status of the surgeon, the facility (HSS or affiliated outpatient surgery center), and the anesthesia group; whether you have out-of-network benefits and choose to use them
• OATS, osteochondral allograft, microfracture, AMZ-TTO, HTO, DFO, MPFL reconstruction, ACL reconstruction, and meniscus surgery are also covered by most major plans when medical-necessity criteria are met. Concurrent procedures may add to the bundled or itemized billing
• The Patella LIFT procedure, when performed under the FDA PELICAN trial, has separate considerations because it is investigational. The Hyalex knee cartilage system FDA trial and amniotic suspension allograft (ASA) injection studies are similarly under trial protocols when participation is offered
• PRP and some biologic injections are not always covered — we review the specifics during your consultation

Before surgery, our office verifies your benefits, obtains pre-authorization where required, and reviews the estimated out-of-pocket cost with you. For benefits verification or to discuss self-pay arrangements, call us at (646) 960-7227 or contact the office.

Emerging Cartilage-Repair Options

MACI is the current FDA-approved gold standard for chondral-only defects in the 2–10 cm² range, but cartilage repair is one of the more active fields in sports orthopedics. Emerging options Dr. Strickland evaluates, participates in, or discusses with patients include:

• CartiHEAL Agili-C — an FDA-approved aragonite-based osteochondral scaffold, now with its own CPT code. See CartiHEAL cartilage injury treatment, the CartiHEAL / OCA / MACI clinical comparison, the one-step cartilage repair with CartiHEAL, the CartiHEAL for trochlear lesions, and the long-term outcomes study
• Hyalex knee cartilage system FDA trial — an investigational synthetic cartilage replacement under FDA trial. See FDA trial of the Hyalex knee cartilage system
• ChondroFiller — an injectable collagen-based cartilage repair option. See the Hype/ChondroFiller cartilage repair commentary
• Amniotic suspension allograft (ASA) injection — under research for symptomatic knee osteoarthritis. See the ASA injection research study
• Stem cells, exosomes, and orthobiologics — an evolving space; outcomes are heterogeneous and most products remain investigational. See stem cells, exosomes, and cartilage repair and the HSS Journal webinar on stem cells and scaffolds
• Engineered cartilage and synthetic substitutes — tissue-engineered constructs and biomaterials are an active area of research. See "engineered cartilage sounds perfect" and silkworms and synthetic substitutes for cartilage, ligaments, and tendons

For patients exercising while managing focal cartilage damage, see running and knee stress: systematic cartilage changes for the literature on running and cartilage. The cartilage-restoration field is moving forward, and FDA-approved options will continue to expand. The current right-sized choice for chondral-only defects in the 2–10 cm² range is still MACI; emerging options expand the menu rather than replace it.

When to Seek a Sub-Specialty Second Opinion

Cartilage repair is one of Dr. Strickland's primary clinical and academic areas. She performs the full menu of cartilage-restoration procedures (MACI, OATS, osteochondral allograft, CartiHEAL), has published her own MACI follow-up data and broader cartilage-restoration outcomes work, has co-hosted the AOSSM Sports Doc podcast on challenging cartilage injuries, and routinely combines cartilage repair with realignment osteotomy, MPFL reconstruction, ACL reconstruction, and meniscus surgery in the same operation when concurrent pathology demands it.

A sub-specialty second opinion is particularly worth seeking when:

• Your MRI shows a focal full-thickness cartilage defect and you want to understand which cartilage operation is right for your lesion
• You have been told you need a partial or total knee replacement at a younger age and want to understand cartilage-preserving alternatives
• You have failed prior microfracture and need to understand revision-cartilage options
• You have combined cartilage damage and malalignment and want a clear plan for combined cartilage repair plus realignment osteotomy
• You have combined cartilage damage and patellar instability and want a sub-specialty plan that addresses both
• You have a large or complex defect — multi-focal, bipolar, with bone loss, or revision — and want to be evaluated for osteochondral allograft, MACI, or CartiHEAL by a high-volume cartilage surgeon
• You are active and want to preserve joint function rather than commit to an implant in your 30s, 40s, or 50s
• You have been offered "watch and wait" for cartilage damage that is symptomatic and progressing
• You want to be evaluated for an FDA trial cartilage-repair implant (Hyalex, Patella LIFT, ASA) where eligibility applies

Cartilage decisions are complex because the right operation depends on lesion size and depth, location, alignment, ligament status, meniscus status, prior surgery, age, BMI, and patient activity goals. Two MRIs that look similar to a non-specialist can lead to different operations in a sub-specialty practice because of these contextual factors. A sub-specialty second opinion does not always change the recommendation — but it does ensure the recommendation is built on the right framework.

Access & Office Locations

Dr. Strickland sees cartilage-repair patients at two offices, both of which work with patients traveling in from outside the immediate area:

• New York City (primary): Hospital for Special Surgery, East River Professional Building, 523 East 72nd Street, 2nd Floor, New York, NY 10021. Upper East Side, accessible from Manhattan, the outer boroughs, Long Island, Westchester, and northern New Jersey via the Queensboro and Triboro bridges and the FDR Drive. Phone: (646) 960-7227.
• Stamford, CT (satellite): Stamford Chelsea Piers, 1 Blachley Road, Stamford, CT 06902 — convenient for patients in Fairfield County, lower Connecticut, and Westchester.

Many patients travel to New York for cartilage-restoration sub-specialty care — particularly for MACI candidacy evaluations, second opinions on prior failed cartilage surgery, complex combined cases (cartilage repair plus osteotomy, MPFL, or meniscus work), and consultations on whether early joint replacement can be avoided. Surgery is performed at HSS. We coordinate consultation, imaging review, and surgery scheduling to minimize travel for out-of-state patients.

Frequently Asked Questions

Source Grounding & Published Research

This page is grounded in Dr. Strickland's published commentary, technical notes, follow-up studies, and patient education on cartilage repair and the broader cartilage-restoration field. Selected references:

Related Specialty Care

For larger cartilage defects, defects with bone involvement, or revision cases, see cartilage transplant (OATS & osteochondral allograft). For the realignment side of cartilage protection (HTO, DFO, AMZ-TTO), see joint preservation and osteotomy. For patellar or trochlear cartilage lesions in the context of patellofemoral pain or arthritis, see patellar pain and patellofemoral arthritis. For patellar instability that contributed to patellar or trochlear cartilage damage, see patellar instability and MPFL reconstruction surgery. For ACL-deficient knees with cartilage damage, see ACL tear surgery. For meniscus-deficient compartments, see meniscal tear and torn meniscus. For multi-compartment knee arthritis where joint preservation is no longer feasible, see knee arthritis. For chondromalacia and tendonitis at the front of the knee, see knee chondromalacia, arthritis, and tendonitis. For complex anatomy where computer-guided planning is helpful, see Mako robotic-assisted surgery.

For Dr. Strickland's published research and editorial commentary on cartilage repair and the broader cartilage-restoration field, the source-grounding table above lists the references used on this page; for the broader publication record, see research & publications.