UV induced surface modification on improving the cytocompatibility of metallocene polyethylene.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Engineering

Background:

• Rising demand for medical implants due to aging populations and increased disease prevalence.
• Metallocene polyethylene (mPE) is a common polymer with potential for implant applications.
• Improving the biocompatibility of existing polymers is crucial for developing advanced medical devices.

Purpose of the Study:

• To investigate the effect of ultraviolet (UV) irradiation on the surface properties and biocompatibility of metallocene polyethylene (mPE).
• To assess the potential of UV-modified mPE for use in medical implants.

Main Methods:

• Surface modification of mPE using UV irradiation at varying dosages (2.5 J/cm² and 5 J/cm²).
• Characterization of surface morphology using Scanning Electron Microscopy (SEM).
• Evaluation of surface wettability via contact angle measurements.
• Assessment of blood compatibility using activated Partial Thromboplastin Time (APTT) and Prothrombin Time (PT) assays.
• Determination of hemocompatibility through hemolytic percentage analysis.
• In vitro cell compatibility studies using MTT assay and cell imaging.

Main Results:

• UV treatment significantly increased surface roughness and hydrophilicity of mPE.
• Enhanced blood compatibility was observed, indicated by prolonged APTT and PT.
• Hemolytic percentage decreased significantly, demonstrating improved safety for red blood cells.
• UV-modified mPE exhibited superior cytocompatibility with 3T3 fibroblast cells.
• Physicochemical property changes were dose-dependent on UV exposure.

Conclusions:

• UV irradiation effectively modifies the surface of mPE, enhancing its biocompatibility.
• The improved surface properties and hemocompatibility make UV-treated mPE a promising candidate for medical implant applications.
• This surface modification technique offers a viable strategy for developing safer and more effective medical implants.