In conclusion, all knots and types of suture material do not necessarily have the same effect on the initial tensile force at failure of suture materials. For nylon, knots did not alter the original mechanics of the suture. The use of SQ knots with 3 throws did not result in a safe knot. For coated polyglactin 910, all knots decreased the initial force at failure of the suture and slippage increased significantly compared with the other 3 sutures. For polyglecaprone 25, all knots decreased the initial force at failure of the suture, with SHH being weaker than the other knots. Granny (GR) and SHH knots decreased the tensile force at failure and elongation by premature failure of the loop. For polydioxanone, SQ and SU knots did not decrease the initial force at failure of the suture. The configurations were 1 linear suture without a knot and the following loops: square (SQ) knot surgeon’s (SU) knot granny (GR) knot and sliding half-hitch (SHH) knot using either 4 and 5 or 3 and 4 throws, depending on the material. A total of 432 samples of 4 types of size 3-0 suture material (polydioxanone, polyglecaprone 25, polyglactin 910, and nylon), representing 9 configurations, were tested in a tensiometer. We hypothesized that all types of knots would significantly influence the initial force and elongation of suture materials and would influence the force and elongation at which the knotted loops break, but not their mode of failure. The influence of the type of material used, knot configuration, and use of an additional throw on the tensile force at failure, the elongation, and the mode of failure of different configurations of linear sutures and knotted suture loops was evaluated in this in-vitro mechanical study.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |