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Sutureless ophthalmic surgery: a scaffold-enhanced bioadhesive technique
Mark T Duffy1, Jeffrey N Bloom, Karen M McNally-Heintzelman
1Department of Ophthalmology and Visual Sciences, University of Illinois College of Medicine, Chicago, Illinois, USA.
Summary
A new scaffold-enhanced cyanoacrylate bioadhesive composite shows superior strength compared to cyanoacrylate alone for ophthalmic surgery. This innovative material offers a promising suture alternative for strabismus procedures and potentially other eye surgeries.
Area of Science:
- Ophthalmology
- Biomaterials Science
- Surgical Innovation
Background:
- Traditional bioadhesives in ophthalmic surgery face challenges with insufficient tensile strength and application difficulties.
- Sutures are the current standard, but alternatives are sought to improve surgical outcomes and efficiency.
Purpose of the Study:
- To evaluate a novel scaffold-enhanced cyanoacrylate bioadhesive composite.
- To assess its potential as a suture substitute in ophthalmic surgery, specifically for strabismus procedures.
Main Methods:
- The bioadhesive composite combined 2-octyl-cyanoacrylate with either a poly(L-lactic-co-glycolic acid) (PLGA) or porcine small intestine submucosa (SIS) scaffold.
- Adhesions were created (muscle-to-sclera, sclera-to-sclera, muscle-to-muscle) in rabbit ocular tissues.
- Breaking load was measured using a material strength-testing machine, with cyanoacrylate alone as the control.
Main Results:
- Scaffold-enhanced cyanoacrylate adhesions demonstrated significantly greater strength (P < 0.001) than cyanoacrylate alone.
- Achieved rectus muscle-to-sclera adhesion strength exceeded in vivo forces reported for human horizontal rectus muscles during extreme gaze.
Conclusions:
- The scaffold-enhanced bioadhesive composite provides initial muscle-sclera adhesion strength suitable for strabismus surgery.
- This composite holds potential as a suture alternative in various ophthalmic surgical applications.