The periodontal ligament (PDL) plays an important role in initiating tooth movement when loads are applied to teeth with orthodontic appliances. It is also the most accessible ligament in the human body as it can be directly manipulated (via the teeth) without surgical intervention.
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 described by a three-parameter visco-elastic model with two elastic parameters and one viscous parameter. The values of these parameters are consistent between animals and between tests on a given animal, and are reasonably consistent with other authors.
|Title of host publication||4th European Conference of the International Federation for Medical and Biological Engineering|
|Subtitle of host publication||ECIFMBE 2008 23–27 November 2008 Antwerp, Belgium|
|Editors||Jos Vander Sloten, Pascal Verdonck, Marc Nyssen, Jens Haueisen|
|Number of pages||4|
|Publication status||Published - 2009|
|Event||4th European Conference of the International Federation for Medical and Biological Engineering - Antwerp, Belgium|
Duration: 23 Nov 2008 → 27 Nov 2008
|Conference||4th European Conference of the International Federation for Medical and Biological Engineering|
|Abbreviated title||ECIFMBE 2008|
|Period||23/11/08 → 27/11/08|