In Vitro Biomechanical Comparison of a 5-Hole 4.5 mm Locking Compression Plate and 5-Hole 4.5 mm Dynamic Compression Plate for Equine Proximal Interphalangeal Joint Arthrodesis

Authors: 
Jong-pil Seo, Takashi Yamaga, Nao Tsuzuki, Kazutaka Yamada, Shingo Haneda, Hidehumi Furuoka and Naoki Sasaki
Volume: 
43
Number: 
5
Pages: 
606-611
Journal: 
Veterinary Surgery
Date: 
July 2014

Objective

To compare the biomechanical properties of a 5-hole 4.5 mm narrow locking compression plate (LCP) and 5-hole 4.5 mm narrow dynamic compression plate (DCP) for equine proximal interphalangeal (PIP) joint arthrodesis.

Study Design

Experimental mechanical study.

Animals

Cadaveric adult equine forelimbs (n = 6 pair).

Methods

For each forelimb pair, 1 PIP joint was stabilized with LCP and the contralateral PIP joint with DCP. The 6 construct pairs were tested using a single-cycle, 3-point dorsopalmar bending system. PIP joints were evaluated with pre- and post-test radiography.

Results

The LCP technique had significantly greater yield load, failure load, and stiffness under single-cycle, 3-point dorsopalmar bending to failure than the DCP technique. There was no significant difference between the 2 constructs for displacement at yield and failure point.

Conclusions

Biomechanically, the LCP technique provided significantly greater stability than the DCP technique under the test condition.