结(造纸)
极限抗拉强度
聚己二酮
数学
医学
外科
材料科学
复合材料
作者
Tyler M. Muffly,Nathan Kow,Imran Iqbal,Matthew D. Barber
标识
DOI:10.1016/j.jsurg.2010.11.001
摘要
The purpose of the study was to determine the optimal number of throws to ensure knot security. Knots were tied with 3, 4, 5, or 6 square throws with 0-gauge coated polyester, polydioxanone, polypropylene, and polyglactin 910. The suture was soaked in 0.9% sodium chloride and subsequently transferred to a tensiometer and broken. A total of 225 knots were tied. Regardless of the suture type, tension at failure for knots with 4 throws, 5 throws, and 6 throws was higher than tension at failure of knots with only 3 throws (p < 0.05 for each). We found no difference in the tensile strength between knots with 4, 5, or 6 throws (p > 0.05 for each). Knots with 4 throws were significantly more likely to come untied than knots with 5 or 6 throws (p < 0.01). Under laboratory conditions, the ideal knot has 5 throws to maximize tensile strength and rate of untying. This finding does not seem to vary by type of suture material.
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