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- Title
In Vitro Acute Load to Failure and Eyelet Abrasion Testing of a Novel Veterinary Screw-Type Mini-Anchor Design In Vitro Acute Load to Failure and Eyelet Abrasion Testing of a Novel Veterinary Screw-Type Mini-Anchor Design.
- Authors
Kunkel, Kevin A. R.; Rusly, Roy J.; Basinger, R. Randy; DesJardins, John D.; Gerard, Patrick D.
- Abstract
Objective To determine acute load to failure (ALF) and suture abrasion (SA) at 0° and 90° for a novel screw-type mini-anchor design. Study Design Biomechanical in vitro study. Sample Population Synthetic bone. Methods Twenty mini-anchors were inserted into synthetic bone blocks assigned to 1 of 2 groups (0° ALF, 90° ALF). Pullout was performed at 5 mm/min. ALF, yield strength and stiffness were calculated. SA constructs were created with 4 groups of 5 anchors each with either 30 lb nylon leader line (NLL), 40 lb NLL, #2 Fiberwire or #5 Fiberwire. SA was performed at 0° and 90° with a sinusoidal wave form at 0.5 Hz and 10 N load for 1000 cycles or until failure. Data were summarized as mean ± SD. ALF data were analyzed using t-tests. SA data were analyzed using log rank, Tukey-adjusted pairwise comparisons and sign tests. Significance was set at P = .05. Results Mean ± SD ALF at 0° and 90° was 431.8 ± 70.8 N and 683 ± 48.7 N, respectively. 90° ALF was significantly higher. Yield strength and stiffness were not significantly different at 0° and 90°. #5 and #2 Fiberwire survived significantly more cycles than 40 lb and 30 lb NLL at 90°. At 0°, 30 lb NLL survived significantly less cycles than either Fiberwire size. Suture orientation did not have a significant effect on SA for Fiberwire constructs. Conclusion The novel mini-anchor has ALF comparable to other mini-anchors. Fiberwire survived more cycles in the novel anchor eyelet than NLL and FW suture orientation in the eyelet did not affect SA.
- Publication
Veterinary Surgery, 2013, Vol 42, Issue 2, p217
- ISSN
0161-3499
- Publication type
Article
- DOI
10.1111/j.1532-950X.2013.01094.x