A Comparative Histopathological Study of Repaired Tendons Wrapped with Two Biological matrices in Bucks

This study was planned to evaluate the efficacy of two biological matrices represented by autologous platelet rich fibrin matrix (PRFM), as well as a cross linked decellularized caprine pericardial extracellular matrix (PECM) on enhancing healing of the experimentally severed superficial digital flexor tendon in a goat model. It was carried out on 48 adult bucks, which were divided randomly into three equal groups. Under sedation and regional anesthesia, SDFT was severed at the mid metacarpal region of the right forelimb. In the first control group, tenorrhaphy was performed and left without additives. While in the second group the tenorrhaphy site was wrapped with autologous platelet rich fibrin strips which were prepared at the time of operation, as well as in the third group the tenorrhaphy site was wrapped with a cross linked decellularized PECM strip which was previously prepared from the whole fresh caprine pericardium. The histopathological evaluation in this study revealed that the neovascularization, cellularity and collagen fiber alignment scores were significantly increased in both treated groups as compared to the control group. In conclusion, both biological matrices led to improvement in tendon healing and repair, without any complications, but the PECM gave superior results in tendon repair when compared to other groups.