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Mechanical Properties and Testing

Technology and Health Care 10 (2002) 281–296 IOS Press Effects of thermal damage on the mechanical properties of collagenous tissues Alptekin Aksan and John J. McGrath Mechanical Engineering Department, Michigan State University, 48824, E.Lansing, USA Utilization of sub-ablative heating of collagenous tissues (in the range of 65–85 ◦C) as a therapeutic means finds widespread application in thermokeratoplasty, treatment of shoulder, knee and ankle instabilities and treatment of chronic discogenic lumbar pain associated with herniated discs [1]. This method of treatment is based on inducing helix-to-coil transformation in the collagen microstructure producing overall tissue shrinkage. In the research presented here, an in vitro experimental approach to quantify the effects of thermal damage on the mechanical properties and mechanics of collagenous tissues is presented. Patella-patellar tendon-tibia complexes are harvested from 18 mature New Zealand White Rabbits and subjected to various thermal loads by means of circulating heated saline solution around the specimens. The temperature histories the tendons experience as well as their shrinkage responses have been measured. During the experiments, the tendons are exposed to cyclic thermal loads comprised of successive heating and cooling cycles. The parameters of interest are the thermal history of the tendon (Ω), the mechanical load http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Technology and Health Care IOS Press

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