Suture Biomechanics and Static Facial Suspension（4）
RESULTS
The results for mean load to failure are shown in Table 1. The load to failure for polypropylene was significantly lower than that for PBCP or PIP in all suture sizes. The load to failure for PBCP vs. PIP was never statistically different. As expected, differences in load to failure were always statistically significant between Suture sizes regardless of the material tested (eg, 0 suture made of any material had a higher mean load to failure than all types of 2-0 or 3-0 suture). All suture samples of a given material and size failed within a small range of load values, which is typical of synthetic materials (Table 2).
Table 1. Mean Load to Failure of Suture Samples
Table 2. Range of Load to Failure for Individual Samples of Various Materials
Polypropylene demonstrated significantly less stiffness than either PBCP or PIP in all suture sizes (Table 3). Size 2-0 PIP demonstrated significantly greater stiffness than 2-0 PBCP; however, the stiffness of PIP and PBCP was not statistically different in the 0 and 3-0 samples. Elongation at loads of 20 and 30 N was significantly greater for polypropylene than for PIP or PBCP in all suture sizes. Size 3-0 PIP had significantly greater elongation than PBCP at a load of 20 N; however, elongation of sizes 0 and 2-0 PBCP and PIP was not statistically different at loads of either 20 or 30 N.
Table 3. Mean Stiffness and Elongation of Suture Samples
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