Comparison of tensile strength of slip knots with that of 3-1-1 knots using 10-0 nylon sutures
| Autor: | Carla Lutchman, Rahim Moineddin, Hall F. Chew, Linus H. Leung |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Nylon sutures Sutures Suture Techniques Outcome measures Materials testing Slip (materials science) Ophthalmology Nylons Knot (unit) Breakage Tensile Strength Ultimate tensile strength Materials Testing Microscopy Electron Scanning Stress Mechanical Composite material Tensile testing |
| Zdroj: | Cornea. 33(4) |
| ISSN: | 1536-4798 |
| Popis: | Purpose The aim of this study was to compare the tensile strength of slip knots with that of 3-1-1 knots using 10-0 nylon sutures. Methods In vitro, destructive materials testing was used. By adhering to the American Standard for Testing and Materials standards for testing of suture materials, slip knots were compared with 3-1-1 knots using 10-0 nylon suture material. Tensile testing was performed on each knot type using the Instron Microtester (Model 5848 Norwood, MA). Scanning electron microscopy was used to analyze all sutures tested to failure. The main outcome measure was the maximum load (newtons) or ultimate tensile strength before which each knot failed by breakage or by unraveling. Results The mean force resulting in failure by breakage of the 3-1-1 knot and slip knot was 0.71 and 0.64 N, respectively (P = 0.048). The mean force resulting in failure by the unraveling of the 3-1-1 knot and slip knot was 0.48 and 0.37 N, respectively (P = 0.022). Conclusions In 10-0 nylon sutures, the 3-1-1 knot has a statistically significant greater tensile strength than the slip knot has in conditions wherein they fail by either breakage or unraveling. |
| Databáze: | OpenAIRE |
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