Retrieval analysis of PEEK rods pedicle screw system: three cases analysis.

ABSTRACT:

Purpose

To analyze the characteristics of PEEK rods retrieved in vivo, specifically their wear and deformation, biodegradability, histocompatibility, and mechanical properties.

Method

Six PEEK rods were retrieved from revision surgeries along with periprosthetic tissue. The retrieved PEEK rods were evaluated for surface damage and internal changes using Micro-CT, while light and electron microscopy were utilized to determine any histological changes in periprosthetic tissues. Patient history was gathered from medical records. Two intact and retrieved PEEK rods were used for fatigue testing analysis by sinusoidal load to the spinal construct.

Results

All implants showed evidence of plastic deformation around the screw-rod interface, while the inner structure of PEEK ro

SUBMITTER: Xu X 

PROVIDER: S-EPMC11193296 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature