22.1 Arthroscopic second generation autologous chondrocyte implantation at 48 months follow-up

Objective To determine the relationship between cartilage lesion etiology and clinical outcomes after second-generation autologous chondrocyte implantation (ACI) in the patellofemoral joint (PFJ) with a minimum of 2 years’ follow-up. Methods A retrospective review of all patients that underwent ACI in the PFJ by a single surgeon was performed. Seventy-two patients with a mean follow-up of 4.2 ± 2.0 years were enrolled in this study and were stratified into 3 groups based on the etiology of PFJ cartilage lesions: patellar dislocation (group 1; n = 23); nontraumatic lesions, including chondromalacia, osteochondritis dissecans, and degenerative defects (group 2; n = 28); and other posttraumatic lesions besides patellar dislocations (group 3; n = 21). Patient’s mean age was 29.6 ± 8.7 years. Patients in group 1 were significantly younger (25.4 ± 7.9 years) than group 2 (31.7 ± 9.6 years; P = 0.025) and group 3 (31.5 ± 6.6 years; P = 0.05). Body mass index averaged 26.2 ± 4.3 kg/m2, with a significant difference between group 1 (24.4 ± 3.2 kg/m2) and group 3 (28.7 ± 4.5 kg/m2; P = 0.005). A clinical comparison was established between groups based on patient-reported outcome measures (PROMs) and failure rates. Results Neither pre- nor postoperative PROMs differed between groups ( P > 0.05). No difference was seen in survivorship between groups (95.7% vs. 82.2% vs. 90.5%, P > 0.05). Conclusion Cartilage lesion etiology did not influence clinical outcome in this retrospective study after second generation ACI in the PFJ. Level of Evidence Level III, retrospective comparative study.

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Second Generation Autologous Chondrocyte Implantation in Patellofemoral Full-Thickness Chondral Defects: A Clinical, Arthroscopic, and Histologic Review at Five-Year Follow-up (SS-19)

Arthroscopy The Journal of Arthroscopic and Related Surgery ◽

10.1016/j.arthro.2008.04.020 ◽

2008 ◽

Vol 24 (6) ◽

pp. e11

Author(s):

Alberto W. Gobbi ◽

Elisaveta Kon ◽

Lyndon Bathan ◽

Massimo Berruto ◽

Maurilio Marcacci

Keyword(s):

Autologous Chondrocyte Implantation ◽

Second Generation ◽

Full Thickness ◽

Chondral Defects ◽

Chondrocyte Implantation ◽

Autologous Chondrocyte

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Articular Cartilage Treatment in High-Level Male Soccer Players

The American Journal of Sports Medicine ◽

10.1177/0363546511420688 ◽

2011 ◽

Vol 39 (12) ◽

pp. 2549-2557 ◽

Cited By ~ 147

Author(s):

Elizaveta Kon ◽

Giuseppe Filardo ◽

Massimo Berruto ◽

Francesco Benazzo ◽

Giacomo Zanon ◽

...

Keyword(s):

Articular Cartilage ◽

Autologous Chondrocyte Implantation ◽

Second Generation ◽

Activity Level ◽

Soccer Players ◽

Chondrocyte Implantation ◽

High Level ◽

Over Time ◽

Autologous Chondrocyte

Background: Soccer is a highly demanding sport for the knee joint, and chondral injuries can cause disabling symptoms that may jeopardize an athlete’s career. Articular cartilage lesions are difficult to treat, and the increased mechanical stress produced by this sport makes their management even more complex. Hypothesis: To evaluate whether the regenerative cell-based approach allows these highly demanding athletes a better functional recovery compared with the bone marrow stimulation approach. Study Design: Cohort study; Level of evidence, 2. Methods: Forty-one professional or semiprofessional male soccer players were treated from 2000 to 2006 and evaluated prospectively at 2 years and at a final 7.5-year mean follow-up (minimum, 4 years). Twenty-one patients were treated with arthroscopic second-generation autologous chondrocyte implantation (Hyalograft C) and 20 with the microfracture technique. The clinical outcome of all patients was analyzed using the cartilage standard International Cartilage Repair Society (ICRS) evaluation package. The sport activity level was evaluated with the Tegner score, and the recovery time was also recorded. Results: A significant improvement in all clinical scores from preoperative to final follow-up was found in both groups. The percentage of patients who returned to competition was similar: 80% in the microfracture group and 86% in the Hyalograft C group. Patients treated with microfracture needed a median of 8 months before playing their first official soccer game, whereas the Hyalograft C group required a median time of 12.5 months ( P = .009). The International Knee Documentation Committee (IKDC) subjective score showed similar results at 2 years’ follow-up but significantly better results in the Hyalograft C group at the final evaluation ( P = .005). In fact, in the microfracture group, results decreased over time (from 86.8 ± 9.7 to 79.0 ± 11.6, P < .0005), whereas the Hyalograft C group presented a more durable outcome with stable results (90.5 ± 12.8 at 2 years and 91.0 ± 13.9 at the final follow-up). Conclusion: Despite similar success in returning to competitive sport, microfracture allows a faster recovery but present a clinical deterioration over time, whereas arthroscopic second-generation autologous chondrocyte implantation delays the return of high-level male soccer players to competition but can offer more durable clinical results.

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Sporting participation following the operative management of chondral defects of the knee at mid-term follow up: a systematic review and meta-analysis

Journal of Experimental Orthopaedics ◽

10.1186/s40634-020-00295-x ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

P. G. Robinson ◽

T. Williamson ◽

I. R. Murray ◽

K. Al-Hourani ◽

T. O. White

Keyword(s):

Systematic Review ◽

Autologous Chondrocyte Implantation ◽

Platelet Rich Plasma ◽

Meta Analysis ◽

Osteochondral Allograft ◽

Chondral Defects ◽

Chondrocyte Implantation ◽

The Mean ◽

Autologous Chondrocyte

Abstract Purpose The purpose of this study was to perform a systematic review of the reparticipation in sport at mid-term follow up in athletes who underwent biologic treatment of chondral defects in the knee and compare the rates amongst different biologic procedures. Methods A search of PubMed/Medline and Embase was performed in May 2020 in keeping with Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines. The criteria for inclusion were observational, published research articles studying the outcomes and rates of participation in sport following biologic treatments of the knee with a minimum mean/median follow up of 5 years. Interventions included microfracture, osteochondral autograft transfer (OAT), autologous chondrocyte implantation (ACI), matrix-induced autologous chondrocyte implantation (MACI), osteochondral allograft, or platelet rich plasma (PRP) and peripheral blood stem cells (PBSC). A random effects model of head-to-head evidence was used to determine rates of sporting participation following each intervention. Results There were twenty-nine studies which met the inclusion criteria with a total of 1276 patients (67% male, 33% female). The mean age was 32.8 years (13–69, SD 5.7) and the mean follow up was 89 months (SD 42.4). The number of studies reporting OAT was 8 (27.6%), ACI was 6 (20.7%), MACI was 7 (24.1%), microfracture was 5 (17.2%), osteochondral allograft was 4 (13.8%), and one study (3.4%) reported on PRP and PBSC. The overall return to any level of sport was 80%, with 58.6% returning to preinjury levels. PRP and PBSC (100%) and OAT (84.4%) had the highest rates of sporting participation, followed by allograft (83.9%) and ACI (80.7%). The lowest rates of participation were seen following MACI (74%) and microfracture (64.2%). Conclusions High rates of re-participation in sport are sustained for at least 5 years following biologic intervention for chondral injuries in the knee. Where possible, OAT should be considered as the treatment of choice when prolonged participation in sport is a priority for patients. However, MACI may achieve the highest probability of returning to the same pre-injury sporting level. Level of evidence IV

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