No announcement yet.

Summary of Stresses at the TMJ

This topic is closed.
  • Filter
  • Time
  • Show
Clear All
new posts

  • Summary of Stresses at the TMJ

    Hi Biomch-L members,

    Last week I posted a couple of questions to the list about determining the
    stresses experienced in the temporomandibular joint (TMJ) and current finite
    element modeling
    in this area. Thanks very much for your help, here is a summary of the
    replies I received:

    Dr David Hooper wrote:

    I did my Ph.D. at the University of Iowa and one my friends was
    working on an FE model of the TMJ. His name is Jim DeVocht and has
    since finished his degree. I believe his work has been published but
    I'm not certain where. Furthermore, I believe that he is currently
    at Palmer Chiropractic College in Davenport Iowa. Good luck.

    Department of Rehabilitation Sciences
    University of East London
    Romford Road
    London E15 4LZ
    Phone 0181-590-7000 (4025)

    **** Thanks to David I managed to track down this article by DeVocht:
    - A Study of Control of Disc Movement within TMJ Using Finite Element
    Analysis 1996. J Oral Maxillofac Surg; 53(12):1431-1437.****

    Eric Holmgren wrote:

    > It seems likely that to obtain the specific information I require for the
    > implant, I will need to develop an FE model to simulate the varying load
    > conditions experienced at the TMJ, so :
    >From my FEA experience, especially in the dental realm, comparing
    FEA-generated stress values to that of histological bone stress values is
    not always accurate. However, comparing the stress fields of varying
    materials and different shapes within the same FEA model to obtain the most
    optimum stress field (as compared to other materials) is extremely useful.

    > 2. I would also like to hear any opinions on how to obtain a complete
    > picture of stress at the condyle. Are max forces exerted on the TMJ only
    > during clench? If so, there may be enough information available and no need
    > for further FE modeling, or, are forces affected by incisal opening?
    I'm not really sure about this, but I would think that not only magnitude
    but direction of bite force would play a role too; i.e. using maximum bite
    force on a stiff food bolus say on the right side of the mandible.

    Just my two cents worth, good luck

    Eric P Holmgren

    Steve Levin wrote:

    I'm not sure where I read it, but there does not appear to be any
    compressive load across the TMJ. It appears that the bones Are suspended
    in there muscle tension network just as the teeth are suspended in their
    Steve Levin
    Potomac Back Center

    Thank you very much for these replies. Any futher information is of course
    Tim Woodfield
    Institute of Biomedical Engineering
    University of Toronto
    Home Ph: (416) 536-2304
    Office Ph: (416) 978-4995
    Office Fax: (416) 978-4317