<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Researchers around the world use histological analysis to provide the most detailed morphological information of articular cartilage repair and it predominantly relies on the use of histological scoring systems which are important tools for valid evaluations. Due to hyaline cartilage complex structure and avascular nature, damaged cartilage does not heal spontaneously and it is still a challenge to regenerate and restore its tissue function. The aim of this study was to investigate the quality of regenerated cartilage by using three different histological scoring systems; O’Driscoll, Pineda and Wakitani which are all classic scores described for such animal studies. We used an <italic>in vivo</italic> ovine model in which a full thickness chondral defect was created and then implanted with the biomaterial (polyhydroxybutyrate/chitosan; PHB/ CHIT). The results of this histological analysis demonstrated that the cartilage repaired tissues received scores indicating that the majority of the regenerated tissue resembled hyaline-like cartilage. After six months of repair the regenerated cartilage showed characteristics like good surface continuity, uniformed stained extracellular matrix, clearly visible zones and cellular proliferation. In conclusion, this study may be used to investigate and improve the regenerative capacity of hyaline cartilage in preclinical models and it also sheds further light on both the evaluation and methods used for the regeneration of damaged cartilage.</p></abstract>

Researchers around the world use histological analysis to provide the most detailed morphological information of articular cartilage repair and it predominantly relies on the use of histological scoring systems which are important tools for valid evaluations. Due to hyaline cartilage complex structure and avascular nature, damaged cartilage does not heal spontaneously and it is still a challenge to regenerate and restore its tissue function. The aim of this study was to investigate the quality of regenerated cartilage by using three different histological scoring systems; O’Driscoll, Pineda and Wakitani which are all classic scores described for such animal studies. We used an in vivo ovine model in which a full thickness chondral defect was created and then implanted with the biomaterial (polyhydroxybutyrate/chitosan; PHB/ CHIT). The results of this histological analysis demonstrated that the cartilage repaired tissues received scores indicating that the majority of the regenerated tissue resembled hyaline-like cartilage. After six months of repair the regenerated cartilage showed characteristics like good surface continuity, uniformed stained extracellular matrix, clearly visible zones and cellular proliferation. In conclusion, this study may be used to investigate and improve the regenerative capacity of hyaline cartilage in preclinical models and it also sheds further light on both the evaluation and methods used for the regeneration of damaged cartilage.

Histological Scoring Systems in the Cartilage Repair of Sheep

Institute of Biology, Zoology and Radiobiology

University of Veterinary Medicine and Pharmacy in Kosice

Folia Veterinaria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Histological Scoring Systems in the Cartilage Repair of Sheep"}

Researchers around the world use histological analysis to provide the most detailed morphological information of articular cartilage repair and it...

Histological Scoring Systems in the Cartilage Repair of Sheep

Published Online: Dec 21, 2019

Page range: 15 - 26

Received: Aug 16, 2019

Accepted: Sep 19, 2019

DOI: https://doi.org/10.2478/fv-2019-0033

Keywords
animal model, articular cartilage, cartilage repair, histology, regeneration, scoring system

© 2019 S. Gullberg et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Histological Scoring Systems in the Cartilage Repair of Sheep

Published Online: Dec 21, 2019

Page range: 15 - 26

Received: Aug 16, 2019

Accepted: Sep 19, 2019

DOI: https://doi.org/10.2478/fv-2019-0033

Keywordsanimal model, articular cartilage, cartilage repair, histology, regeneration, scoring system

© 2019 S. Gullberg et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
animal model, articular cartilage, cartilage repair, histology, regeneration, scoring system