Intraarticular fractures (IAFs) are a leading cause of posttraumatic osteoarthritis (PTOA). Despite the latest orthopaedic treatment techniques, the risk of PTOA after IAFs has remained unacceptably high. In order to progress in this field, a new mechanical insult technique to create a large animal survival model of human IAF was developed. Current IAF models report the initial gravitational potential energy as the fracture energy value. However, this model included a pendulum device that was instrumented to accurately measure the amount of energy absorbed during fracture insult.
After validating the energy absorption measurement with a mechanical testing machine and motion capture system, an in vivo study was conducted. The range of energy absorption measurements during fracture of the eleven animals was 11.7–31.8 joules, with a mean and standard deviation of 20.8 ± 5.7 joules. On average, the energy absorption measurements were approximately 52 percent of the pre-impact kinetic energy values. These data showed that there was a substantial difference between the energy absorbed during fracture insult and the pre-impact energy, which provided novel information associated with the pathomechanics of the induced injury.
|Advisor:||Brown, Thomas D.|
|Commitee:||Grosland, Nicole M., Tochigi, Yuki|
|School:||The University of Iowa|
|School Location:||United States -- Iowa|
|Source:||MAI 51/02M(E), Masters Abstracts International|
|Subjects:||Biomedical engineering, Mechanical engineering, Biomechanics|
|Keywords:||Absorption, Animal, Energy, Fracture, Osteoarthritis, Pendulum|
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