Osteochondral regeneration with a novel aragonite-hyaluronate biphasic scaffold: up to 12-month follow-up study in a goat model
| Autor: | Jonathan Shani, Ken Zaslav, Dror Robinson, Elizaveta Kon, Giuseppe Filardo, John E. Eisman, Nir Altschuler, Andrew Levy |
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| Přispěvatelé: | ARAG - AREA FINANZA E PARTECIPATE, DIPARTIMENTO DI SCIENZE BIOMEDICHE E NEUROMOTORIE, Da definire, Kon, E., Filardo, G., Shani, J., Altschuler, N., Levy, A., Zaslav, K., Eisman, J.E., Robinson, D. |
| Rok vydání: | 2015 |
| Předmět: |
aragonite-hyaluronate
Time Factors scaffold Calcium Carbonate Weight-Bearing chemistry.chemical_compound Osteochondral defect Hyaluronic acid medicine Animals Orthopedics and Sports Medicine Femur Hyaluronic Acid Tissue Scaffolds business.industry Hyaline cartilage Goats Cartilage Regeneration (biology) Agili-C Histology Anatomy Chondrogenesis medicine.anatomical_structure chemistry Cartilage regeneration Models Animal hyaline cartilage aragonite-hyaluronate scaffold Female hyaline cartilage Surgery Implant business Follow-Up Studies Research Article |
| Zdroj: | Journal of Orthopaedic Surgery and Research |
| ISSN: | 1749-799X |
| DOI: | 10.1186/s13018-015-0211-y |
| Popis: | Background The regeneration of articular hyaline cartilage remains an elusive goal despite years of research. Recently, an aragonite-hyaluronate (Ar-HA) biphasic scaffold has been described capable of cartilage regeneration over a 6-month follow-up period. This study was conducted in order to assess the fate of the regenerated osteochondral tissue in a 12-month-long validated caprine model. Hypothesis/purpose The hypothesis was that the implantation of the Ar-HA implant leads to tissue regeneration and maturation. Study design A two-arm caprine model of a critical osteochondral defect compares the fate of acute osteochondral defects (group A) to Ar-HA implanted defects (group B). Methods Critical 6 mm in diameter and 10-mm in depth osteochondral defects were created in the load-bearing medial femoral condyle of 20 mature goats and randomized into two groups. In group A (n = 6), a blood clot spontaneously filled the defect; in group B (n = 14), a single Ar-HA implant reconstructed the defect. The animals were sacrificed after either 6 or 12 months. Parameters assessed included clinical evaluation, x-rays, micro-CT, ultrasound and histology at both time points, and specimen high-field magnetic resonance imaging with T2 mapping at the 12-month time point. Results In most group A animals, the defects were not reconstructed (1/3 at 6 months, and 0/3 at 12 months). Defects in group B were mostly reconstructed (5/7 at 6 months and 6/7 at 12 months). Group A defects were either empty or contained fibrous repair tissue; while group B filling was compatible with hyaline cartilage and normal bone. Conclusion Ar-HA scaffolds implanted in critical osteochondral defects result in hyaline cartilage formation and subchondral bone regeneration. The results improved at the 12-month time point compared to the 6-month time point, indicating a continuous maturation process without deterioration of the repair tissue. Clinical relevance Osteochondral defects are common in humans; the results of the current study suggest that an acellular Ar-HA scaffold might induce cartilage and subchondral bone regeneration. |
| Databáze: | OpenAIRE |
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