MATERIALS SCIENCE
Multi-Material Architecture
Two materials. One screw. Every advantage.
BioPolymerOuter Shell
12–18 moAbsorption
MRIArtifact-Free
Architecture
Layer 01
Outer Shell — Bioresorbable Polymer
Selected for its controlled degradation rate that matches the typical bone healing timeline (12–18 months). The polymer maintains sufficient mechanical strength during the critical first 8–12 weeks of fracture consolidation, then gradually transfers load to the healing bone as it absorbs.
Bioresorbable — absorbs over 12–18 months
Layer 02
Inner Rod — Bio-Inert Core
Provides the structural backbone of the screw. This material does not degrade and remains permanently in the body, but its small cross-section and bio-inert properties mean it causes no adverse tissue response.
Bio-inert — permanently biocompatible
COMPARISON
Metallic vs Bioabsorbable
| Property | Metallic Screw | FlexiScrew |
|---|---|---|
| Material | SS 316L / Ti-6Al-4V | Bioresorbable polymer + bio-inert rod |
| Strength | Exceeds bone (stress shielding risk) | Matches cortical bone |
| Geometry | Straight only | Straight, C-curved, S-curved |
| Absorption | None — permanent implant | Outer shell absorbs in 12–18 months |
| Revision surgery | Often required for removal | Not required |
| MRI compatibility | Artifacts in imaging | Fully MRI compatible |
| Compliance | ASTM F138 / F136 | ISO 10993, ASTM F136 (rod) |
✓ denotes the superior option per property. “Equal” indicates parity or context-dependent performance.