Original Article - Research
Mechanical Testing of Orthopedic Suture Material Used for Extra-Articular Stabilization of Canine Cruciate Ligament-Deficient Stifles
Article first published online: 23 SEP 2011
© Copyright 2011 by The American College of Veterinary Surgeons
Volume 41, Issue 2, pages 266–272, February 2012
How to Cite
Rose, N. D., Goerke, D., Evans, R. B. and Conzemius, M. G. (2012), Mechanical Testing of Orthopedic Suture Material Used for Extra-Articular Stabilization of Canine Cruciate Ligament-Deficient Stifles. Veterinary Surgery, 41: 266–272. doi: 10.1111/j.1532-950X.2011.00887.x
- Issue published online: 16 FEB 2012
- Article first published online: 23 SEP 2011
- Manuscript Accepted: JUN 2011
- Manuscript Received: OCT 2010
To determine (1) if braided, polyblend orthopedic suture materials are mechanically superior to monofilament nylon leader and (2) have mechanical properties similar to biomechanical properties of the canine cruciate ligament.
Different suture material types.
Mechanical testing was performed on 5 different orthopedic suture materials: 80# test Mason monofilament nylon leader (MNL), FiberTape (FT), FiberWire (FW), Xgen OrthoFiber (XOF), and LigaFiba (LF) using a servohydraulic materials-testing machine. Materials were loaded to failure while collecting data for tensile strength, load at 3 mm and 5 mm of elongation and stiffness. Cyclic elongation of each suture material was tested under physiologic loading between 70 and 150 N for 1000 cycles using 3 mm of elongation to describe excessive elongation. Load at 3 mm of elongation and performance during cyclic testing were compared to previously published physiologic loads in the dog stifle.
Ultimate tensile strength was greatest with LF, followed by XOF that was stronger than FT and FW, and the weakest was MNL. LF was the stiffest of all tested materials at 3 mm of elongation. Cyclic elongation was greatest for the MNL elongating 3.75 mm after 1000 cycles. All polyblend braided materials continued to elongate throughout the 1000 cycles under physiologic loads.
Polyblend suture materials are stronger and elongate less than MNL in pure tension. The mechanical performance of all sutures tested is questionable when compared with the mechanical demands of the normal stifle in a mid-sized dog.