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Updated: Mar 5, 2026

A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions
Published on: April 4, 2017
Single cycle to failure in bending of three titanium polyaxial locking plates
Chadi Eid1, Filippo Maria Martini, Andrea Bonardi
1Dr. Chadi Eid, Ortovet stp srl, Piazza Alessandrini 2, Fidenza 43036, Italy, Phone: +39 320 064 7705, E-mail: chadi.eid@live.com or chadi.eid@ortovet.org.
Objective:
Evaluation of the bending properties in one direction of three titanium polyaxial locking plate systems.
Materials And Methods:
The Polyaxial Advanced Locking System (PAX®) straight plate (PAX SP), the PAX® reconstruction plate (PAX RP), and the VetLOX reconstruction plates (VetLOX) were evaluated individually and as constructs applied to a bone model simulating a fracture gap and compared using a two-way analysis of variance and Tukey post-hoc analysis.
Results:
The PAX SP had the highest values of bending stiffness, bending structural stiffness and bending strength. When tested as plates alone, the PAX RP and VetLOX showed no differences with regard to bending stiffness and bending structural stiffness, whilst the PAX RP had significantly higher strength. The PAX RP construct had significantly higher bending stiffness, bending structural stiffness and bending strength than the VetLOX construct.
Clinical Relevance:
The PAX RP and VetLOX reconstruction plates are much more likely to fail when used as bridging implants, thus adjunct support is needed. The lower bending strength of the VetLOX reconstruction plates suggests it should not be used in fractures under high loads.
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