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Analysis of viscoelastically active polypropylene sutures
M H Laughton1, K S Fancey1, L A France1
1University of Hull, HU6 7RX, United Kingdom.
Summary
Thermomechanical treatment enhances polypropylene surgical sutures, improving fibroblast motility via viscoelastic recovery. Water contact angle measurements effectively track surface changes and predict cellular responses for advanced wound healing applications.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Wound Healing Research
Background:
- Thermomechanical treatment of polypropylene surgical sutures influences fibroblast motility through viscoelastic recovery.
- This process involves suture contraction and electric charge release over a 42-day healing period.
- Further characterization of treatment effects on suture properties and long-term charge output is needed.
Purpose of the Study:
- To characterize the effects of thermomechanical treatment on key polypropylene surgical suture properties.
- To evaluate long-term electric charge output from viscoelastic recovery using water contact angle measurements (CAMs).
- To establish CAMs as a sensitive, time-resolved method for assessing suture surface changes and predicting cellular response.
Main Methods:
- Thermomechanical treatment applied to polypropylene surgical sutures.
- Characterization of mechanical and thermal properties, and surface morphology.
- Water contact angle measurements (CAMs) to assess hydrophobicity and surface changes over time.
- Correlation of CAMs data with previous electrometer-based measurements and skin cell motility data.
Main Results:
- No significant changes in suture tensile strength or thermal properties were observed.
- Minor alterations in other mechanical parameters and surface morphology remained within regulatory tolerances.
- CAMs demonstrated significant, time-dependent reductions in suture hydrophobicity.
- A direct correlation was found between contact angle and skin cell motility, validating CAMs as a predictive tool.
Conclusions:
- Thermomechanical treatment yields polypropylene sutures with acceptable mechanical and thermal properties.
- CAMs provide a sensitive, time-resolved method to monitor suture surface changes during viscoelastic recovery.
- This technique complements existing methods and offers valuable preliminary insights into potential cellular responses for next-generation sutures.
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