Mechanical and Biologic Comparison of OviTex™ and Strattice™ Surgical Meshes
Overview
This study compared the mechanical properties and host tissue responses of hybrid OviTex meshes and biologic Strattice mesh. In vitro and in vivo testing demonstrated differences in mesh structure, mechanical strength, and host integration, providing insights into their potential clinical performance.
Background
Surgical meshes are used to reinforce weakened tissue after surgery, traditionally classified as synthetic or biologic. Synthetic meshes offer strength but may cause inflammation and complications, especially in contaminated fields. Biologic meshes provide a collagen scaffold supporting tissue integration but vary in mechanical support and cost. Hybrid meshes, combining synthetic and biologic components, aim to balance strength and biocompatibility. Strattice is a non-crosslinked porcine-derived biologic mesh, while OviTex is an ovine-derived hybrid mesh with permanent or resorbable polymer stitching.
Data Highlights
Test
Mesh Type
Key Findings
SEM & Histology
Strattice vs OviTex 2S-R
Differences in collagen integrity and ECM microstructure observed
Tensile Testing (OOP)
Strattice vs OviTex 2S-R
Maximum load and stiffness measured; OviTex includes polymer stitching
Collagenase Digestion
Strattice vs OviTex 2S-R
Mechanical strength retention assessed after enzymatic degradation
In Vivo Rodent Model
Strattice vs OviTex 2S-R
Histopathology and tensile testing post-implantation to evaluate host response
In Vivo Primate Model
Strattice vs OviTex 1S-P
Abdominal wall repair model assessing integration and mechanical strength
In vitro tensile testing showed OviTex meshes retain strength due to polymer reinforcement, even after collagenase exposure.
Histological analysis revealed differences in extracellular matrix integrity and host tissue integration between meshes.
In vivo rodent and primate models demonstrated varied inflammatory responses and mechanical performance post-implantation.
Clinical Implications
Understanding the mechanical and biologic characteristics of surgical meshes aids in selecting appropriate materials for abdominal wall repair. Hybrid meshes like OviTex may offer improved mechanical strength with favorable host integration, potentially reducing complications seen with synthetic meshes. Strattice’s biologic properties may benefit cases requiring minimal inflammatory response.
Conclusion
This comparative evaluation highlights distinct mechanical and biologic profiles of OviTex hybrid and Strattice biologic meshes, informing clinical decisions for hernia and soft tissue repair. Further clinical studies are warranted to correlate these findings with long-term outcomes.
References
1 - Surgical Meshes in Tissue Repair
2 - Classification and Properties of Surgical Meshes
3 - Complications Associated with Synthetic Meshes
