Findings are presented here from a prototype palpation device for making load-displacement measurements, intended ultimately for in vivo use on humans. Here, the device is applied in vitro to a number of pig-jaws to assess its ability to distinguish visco-elastic properties of the PDL.
Four jaws were tested, each test consisting of the application of a series of step displacements to the second mandibular premolar, and allowing the stress to relax over a period of up to 35 seconds. The resulting stress relaxation curves are lit to a number of simple visco-elastic models to assess the most appropriate method of assessing short- and medium-term visco-elastic properties. The results indicate that four-parameter models give significantly better results than three-parameter models and that the time of testing is critical in determining longer time-constant effects.
|Title of host publication||World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany|
|Subtitle of host publication||Vol. 25/11 Biomedical Engineering for Audiology, Ophthalmology, Emergency and Dental Medicine|
|Editors||Olaf Dössel, Wolfgang C Schlegel|
|Number of pages||4|
|Publication status||Published - 2009|
|Event||World Congress on Medical Physics and Biomedical Engineering - Munich, Germany|
Duration: 7 Sep 2009 → 12 Sep 2009
|Conference||World Congress on Medical Physics and Biomedical Engineering|
|Period||7/09/09 → 12/09/09|
- tooth displacement
- periodontal ligament
- Visco-elastic models