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Biomechanical Testing

Clinical research has shown that an early secure fixation of a prosthesis is prognostic for the life span of the prosthesis. One of the purposes of experimental implant research is to examine the effect of different treatments on the fixation of implants. By finding an optimal fixation of a prosthesis the life span can be prolonged. The result of this may be that the patient does not need a replacement of his prosthesis and with this avoid surgery.

The fixation of an implant can, among others, be evaluated by the use of a biomechanical push-out test. In order to execute a biomechanical push-out test you need to make a bone block containing an implant (See ”Hard tissue preparation”). The push-out test is made by pushing the implant out of the bone block with a constant velocity while the power with which the implant is pushed out of the bone block, is registered. From the registered values it is possible to draw a force displacement curve. This curve makes it possible to calculate parameters that give us information about the biomechanical fixation of the implant. 

At the Orthopaedic Research Lab, biomechanical push-out tests are performed by a MTS Bionics Test Machine.

 
Push-out Machine

MTS System Corpotarion
14000 Technology Drive
Eden Prairie, MN, USA

www.mts.com

 
Calendar

Publications
No effect of cognitive behavioral patient education for patients with pain catastrophizing before total knee arthroplasty: a randomized controlled trial.
Birch S, Stilling M, Mechlenburg I, Hansen TB.
Weight Loss Intervention Before Total Knee Replacement: A 12-Month Randomized Controlled Trial.
Liljensøe A, Laursen JO, Bliddal H, Søballe K, Mechlenburg I.
Asymmetry and pelvic movements 6 months after total hip replacement Secondary analyses from a randomized controlled trial.
Mikkelsen LR, Petersen AK, Søballe K, Mikkelsen SS, Mechlenburg I.
 Orthopaedic Research Aarhus University Hospital Palle Juul-Jensens Boulevard 99 Entrance J 8200 Aarhus N Phone: +45 7846 7471 
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