Mechanical comparison of 3 anchoring techniques in the muscular process for laryngoplasty in the equine larynx.

This research study compared the mechanical properties of two new techniques and one conventional technique for anchoring the muscular process in an equine laryngoplasty procedure. The study found that in cyclic loading, a screw technique is more stable than a double loop, and at least as stable as a single loop. In single cycle to failure tests, the double loop was the strongest construct, while the screw technique was stronger than the single loop.

Experimentation Method

• The experiments for the research were conducted using ex vivo equine larynges, with a total of 60 specimens used in the study.
• The anchoring techniques compared were a single loop (SL) technique, a screw (SC) technique, and a double loop (DL) technique.
• These constructs were subjected to cyclic loading and oscillation ranging from 5 to 50 N for 3000 cycles. Following this, a single cycle to failure test was performed to assess the strength and durability of each technique.

Results of the Study

• The mean distraction during cyclic loading was greater for the double loop technique, followed by the single loop and screw techniques. However, no significant difference was found between the single loop and screw techniques or between the single loop and double loop techniques.
• The mean ultimate failure load was greatest for the double loop technique, followed by the screw technique, and then the single loop technique.
• Failure in the techniques was due to different reasons: cartilage tearing was found in the double loop and single loop techniques, while for the screw technique, failure occurred either due to the screw pulling out or knot slippage.

Conclusions drawn from the Study

• In terms of stability under cyclic loading, the researchers found the screw technique was more stable than the double loop technique and at least as stable as the single loop technique.
• In single cycle to failure tests, the double loop technique proved to be the strongest construct, whereas the screw technique exhibited greater strength than the single loop technique.
• The findings of this study could have significant implications for improving techniques for anchoring the muscular process in laryngoplasty procedures for equine patients.