Tissue Perfusion and Biomarkers Assessment Following Root Coverage Procedures.

Area of Science:

• Periodontal regeneration and tissue engineering
• Biomaterial-based therapies for soft tissue augmentation
• Advanced imaging techniques in regenerative medicine

Background:

• Gingival recession defects pose aesthetic and functional challenges.
• Coronally advanced flap (CAF) surgery is a common root coverage technique.
• Growth factors, like recombinant human platelet-derived growth factor-BB (rhPDGF), are explored to enhance healing in combination with biomaterials.

Purpose of the Study:

• To evaluate tissue perfusion changes and wound healing biomarkers following root coverage procedures.
• To compare the efficacy of cross-linked xenogeneic collagen matrix (CCMX) with and without rhPDGF.
• To assess the correlation between early perfusion measurements and final clinical outcomes.

Main Methods:

• Secondary analysis of a clinical trial involving CAF with CCMX (control) or CCMX + rhPDGF (test).
• High-frequency Doppler ultrasonography (HFUS) used for dynamic tissue perfusion measurements (DTPMs) at multiple time points over 6 months.
• Gingival crevicular fluid (GCF) analyzed for wound healing biomarker expression.

Main Results:

• The CCMX + rhPDGF group showed significantly higher DTPMs (perfusion relief intensity, perfused area, blood flow intensity) at 2 weeks post-surgery.
• Early DTPMs in the graft and flap regions correlated positively with final mean root coverage, complete root coverage, and volume gain.
• Differential expression of IL-1β, PDGF-BB, and VEGF observed between groups; early PDGF-BB levels associated with recovery time.

Conclusions:

• HFUS effectively assessed tissue perfusion in reconstructive surgical sites.
• CCMX + rhPDGF significantly improved early DTPMs in graft and flap regions compared to CCMX alone.
• Early perfusion dynamics predict PROMs and final clinical outcomes in root coverage procedures.