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Design of a Screw Plate System to Minimize Screw Loosening in Sternal Fixation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Song, David D. Brunelli, John Paul Ford, Michael Killion |
| Copyright Year | 2011 |
| Abstract | Acknowledgements The authors of this design project would like to thank the following individuals for their help: Professor Kristen Billiar for his guidance and support throughout the project and the use of the core facility at Gateway. for their clinical experience, insight and support. John Dieselman for his mechanical testing experience and use of his anti-wobble screw-plate system. Authorship All group members participated equally in the writing and editing of this report. Abstract The use of screw-plate fixation devices after sternotomy procedures is becoming more prevalent with studies showing the mechanical superiority of such devices. However, there is no current device that is capable of supplying both the compressive and locking forces needed to optimally fixate the plate to the bone. The goal of this project is to create an anti-wobble screw-plate fixation device capable of reducing sternal displacement after fixation using clinically relevant materials. The design achieves this anti-wobble effect through the use of a modified one piece, two-part screw that allows for full compression between the bone-plate interface before locking into the plate. The device was designed and manufactured to clinical specifications in the final prototype, and the anti-wobble concept was tested in a bone analog and human cadaveric sternum using an earlier prototype. Using a uniaxial mechanical testing machine, cyclic loading from 0 to 25N was applied for 15,000 cycles to mimic breathing forces. The anti-wobble concept, having both compression and locking, reduced displacement of the bone plate on a sternal segment. In a bone analog, the displacements for standard nonlocking and anti-wobble systems were 0.57mm and 0.20mm, respectively. The experimental results indicate that the anti-wobble system may significantly minimize screw-displacement, and a clinically relevant product was developed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://web.wpi.edu/Pubs/E-project/Available/E-project-042811-104704/unrestricted/KLB1002-Sternal_fixation_Final_Report.pdf |
| Alternate Webpage(s) | https://digitalcommons.wpi.edu/cgi/viewcontent.cgi?article=4054&context=mqp-all |
| Alternate Webpage(s) | http://www.wpi.edu/Pubs/E-project/Available/E-project-042811-104704/unrestricted/KLB1002-Sternal_fixation_Final_Report.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
