# Tomographic Assessment of Bone Regeneration in Osteochondral Lesion Treated with Various Biomaterials in a Sheep Model Study

## TL;DR

This study uses CT scans to assess bone regeneration in sheep treated with different biomaterials, showing that HMG scaffolds perform best.

## Contribution

The study introduces a tomographic method using Hounsfield units to evaluate scaffold integration and tissue regeneration in osteochondral lesions.

## Key findings

- HMG scaffolds showed superior integration and regeneration compared to HWS, BWS, and control groups.
- CT assessment with Hounsfield units is effective for evaluating hard tissue regeneration in osteochondral defects.
- Statistical analysis confirmed significant differences in scaffold performance, favoring HMG.

## Abstract

Osteochondral defects, involving both articular cartilage and subchondral bone, pose significant challenges to joint function and health due to the lack of spontaneous healing and the risk of long-term degenerative diseases like osteoarthritis. Biomaterials have emerged as important components in the development of scaffolds, providing structural support that facilitates tissue growth, integration, and regeneration. This study aims to demonstrate the effectiveness of a tomographic assessment method for optimizing the evaluation of osteochondral regeneration, particularly using Hounsfield units, to enable the evaluation of scaffold integration and tissue regeneration. The sheep model was selected as a model study. Two distinct configurations of biomaterials were utilized in this study: Honey (HMG—Mg doped hydroxyapatite; HWS—wollastonite–hydroxyapatite) and Bi-layer (BWS—wollastonite–hydroxyapatite). The HMG scaffold demonstrated superior integration, reparative tissue quality, and regeneration potential compared to the HWS, BWS, and CTRL groups. The findings underscore the significance of CT assessment as a preliminary method for evaluating hard tissue, such as bone, employing Hounsfield units. Statistical evaluations validated the significant differences in performance, particularly favoring the HMG group. The results of this study underscore the importance of tomographic assessment in evaluation of osteochondral regeneration.