Vet Comp Orthop Traumatol 2018; 31(S 02): A1-A25
DOI: 10.1055/s-0038-1668243
Poster Abstracts
Georg Thieme Verlag KG Stuttgart · New York

Biomechanical Comparison of 3.5 mm String of Pearl and Cortical Pearl Systems in a Simulated Fracture GAP Model and the Effect Plate Bending on Screw Push Out

Giovanni Tremolada
1   Clinical Sciences, Colorado State University, Fort Collins, Colorado, United States
,
Daniel D. Lewis
2   Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, United States
,
Ryan Taggart
3   Adelaide Veterinary Specialist and Referral Center, Norwood, Australia
,
Ross H. Palmer
1   Clinical Sciences, Colorado State University, Fort Collins, Colorado, United States
,
Nicholaas Lambrechts
1   Clinical Sciences, Colorado State University, Fort Collins, Colorado, United States
› Author Affiliations
Further Information

Publication History

Publication Date:
27 July 2018 (online)

Also available at
 
 

    Introduction: Multiple locking systems are commercially available on the market; knowing their biomechanical characteristics may help the surgeon in decreasing the risk of implant failure. The aim of the study was to compare biomechanical properties of the string of pearl (SOP) and cortical pearl plate system (CPPS) systems in a simulated fracture gap model and evaluate the effect of plate contouring on the screw push out force.

    Materials and Methods: Twenty specimens were created for the SOP and CPPS groups. Each group consisted of eight plate-synthetic bone model constructs to evaluate stiffness(N/mm), yield load (N) and load to failure (N) in axial compression; six uncontoured 3-holes plates to evaluate screw push out; and six contoured 3-holes plates to evaluate the effect of uniplanar plate bending on screw push out.

    Results: There was no statistical difference in stiffness between groups. There was statistical difference in yield point and maximum load between groups. No difference in screw push out was noted before and after plate contouring in the SOP or CPPS group, but a statistically significant difference was noted between groups.

    Discussion/Conclusion: SOP plates have higher yield point and load to failure compared with CPPS plates. A possible explanation would be a difference in how the 316 L stainless steel is worked in each system. The CPPS plates showed a significant higher push out force in the unmodified and bent group. The clinical importance of this finding is unknown, as the minimum safe push out resistance has not been determined.

    Acknowledgement: VOI donated the implants.


    #

    No conflict of interest has been declared by the author(s).