In Vitro Mechanical Comparison of Screwed, Bolted, and Novel Interlocking Nail Systems to Buttress Plate Fixation in Torsion and Mediolateral Bending

Abstract

The angle-stable locking mechanism of the new ILN eliminates all slack in the system; thus, interfragmentary motion will likely be reduced compared with standard ILN, which may improve the local environment for fracture healing.

Effect of Screw Type and Distribution on the Torsional Stability of 3.5 mm String of Pearls Locking Plate Constructs

“…Second, the use of a synthetic bone model may yield different results than if testing had been performed on natural bones. While likely true, synthetic bone models offer advantages including reduced variability between specimens, reduced number of samples to establish significant differences between groups and consistent evaluation of the implant independent of the bone/implant interface . Interestingly, our results are comparable to those of an earlier study in which a validated synthetic bone model was used to evaluate the torsional behavior of 3.5 mm SOP constructs .…”

“…A previously described synthetic fracture‐gap bone model (Olympian Tool, St. Johns, MI) was used . Synthetic tibial bone models (n = 32) were manufactured from 30% glass‐filled structural nylon (Part No.…”

“…All specimens were tested in torsion following a reported protocol . In brief, constructs were mounted in a dedicated torsional fixture that converted linear displacement of the actuator of the servo‐hydraulic testing machine (Instron model 1331, Instron Corp., Canton, MA) into rotation via a rack and pinion assembly.…”

“…Sample sizes were extrapolated from similar mechanical studies in our laboratory in which power analysis (power > 0.8) was performed on means (± SD) obtained during torsional testing . Data were reported as means (± SD) and compared using a single factor ANOVA.…”

Treatment of comminuted tibial shaft fractures in four dogs with the use of interlocking nail connected with type I external fixator

“…To minimize the loss of soft tissue a very small incision is made during surgical fixation to view the fracture site and correctly position the pins (McLaughlin 1999, Palmer 1999, Horstman et al 2004). This approach significantly reduces the risk of iatrogenic damage to blood vessels at the fracture site, it promotes blood flow to the fractured bone (Lansdowne et al 2007) and minimizes the risk of infection (Wyrsch et al 1996, Im andTae 2005). In own research this manner was sufficient for visualization of the medullary canal of distal main bone fragment and correct placement of the interlocking nail inside of it.…”