Biofunctionalization of Silk Fibroin Scaffolds with Enamel Matrix Protein and Injectable Platelet Rich Fibrin for Soft Tissue Augmentation: an In-ovo Study

Overview

Journal Int J Implant Dent

Publisher Springer

Specialty Dentistry

Date 2025 Feb 20

PMID 39976848

Authors

Diana Heimes

Nadine Wiesmann-Imilowski

Timpe Heidebrecht

Sebastian Blatt

Andreas Pabst

Philipp Becker

Sandra Fuest

Jurgen Brieger

Ralf Smeets

Peer W Kammerer

Affiliations

Soon will be listed here.

Abstract

Purpose: Silk fibroin (SF) is a biomaterial derived from the cocoon of the mulberry silkworm. This study aimed to assess the capacity of SF matrices biologized with injectable platelet-rich fibrin (iPRF) or enamel matrix protein (EMP) to modulate angiogenesis and immune response in the chorioallantoic membrane (CAM) assay.

Methods: 300 eggs were divided into the following groups: CM + NaCl, CM + iPRF, CM + EMP, SF + NaCl, SF + iPRF, and SF + EMP. Matrices were applied to the CAM on embryonic development day (EDD) 7 after rehydration. Angiogenesis, represented by vascularized area, vessel density, and vessel junctions, was evaluated on EDD 10, 12, and 14. Additionally, gene expression of HIF-1ɑ, VEGF, MMP-13, and NOS2 was assessed via quantitative polymerase chain reaction (qPCR) on EDD 11 and 14.

Results: The number of vascularized specimens was notably higher in SF matrices regardless of the treatment applied, while in the CM group, only matrices biofunctionalized with iPRF demonstrated vascularization. On EDD 14, the CM + iPRF group exhibited the highest values for total vascularized area (CM + iPRF: 57.52%, SF + iPRF: 21.87%, p < 0.001), vessel density (CM + iPRF: 0.0067 μm/µm, SF + iPRF: 0.0032 μm/µm, p = 0.002), number of vessel junctions (CM + iPRF: 14.45, SF + iPRF: 4.82, p = 0.001). Gene expressions displayed high data variability and no significant differences between the groups.

Conclusions: Biofunctionalization with iPRF in CM leads to a high vascularization rate probably through their capability of retaining higher liquid volumes, suggesting improved intraoral wound healing after guided tissue regeneration (GTR). Despite biofunctionalization, SF matrices exhibit a high vascularization, indicating SF as a promising material for GTR.

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