Programme

Unfurtunately the monastery Irsee has been closed by the Bavarian government due to the corona virus.

Therefore we have decided to offer the conference as a web conference only.

In those unpredictable times, protecting our participants’ health has the highest priority for us!

The scientific exchange must not come to a complete standstill and we believe that with this web solution we have found a way to keep the scientific community going.

In order to participate in the livestream of the conference as easy as possible and to give your presentation, we recommend the use of the web browsers Google Chrome or Microsoft Edge.

Here you can find detailed instructions for using the livestream.

As a participant of the Bioinspired 2020 you have received an e-mail containing the login data for the web conference.

The login data for the sessions are provided daily.

In order to allow all conference participants access to the posters, we ask you to upload your poster by login on the conference homepage and clicking on the button "My Submission" in the upper right corner of the conference homepage. Then select the submission to which you want to upload the poster and upload the poster at the bottom of the page.

Furthermore we would like to ask all poster authors to prepare 4 PowerPoint slides to present your poster to the audience.
Please also include your contact details on the digital poster to allow participants to reach you with questions.

Please note that your poster will be pictured publically.

As poster author you can upload your poster similar to the way you submitted your abstract.
Click on "My Submissions" in the upper right corner at the homepage.

Poster documents can be found by opening the respective abstract in the online programme.
If a poster document has already been uploaded for the abstract, it can then be opened and downloaded.

Please note that your poster will be pictured publically.

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Please use for this the Q&A (F&A) button!

For further scientific exchange we implemented a discussion forum on the homepage of the DGM.
Please visit discussion.dgm.de and use your DGM or Bioinspired user credentials to login.

Back to overview

Poster Pitch

Interfaces in Dental Enamel and Implications for Mechanical Properties

Monday (16.03.2020)
17:20 - 17:23

Dental enamel is a hierarchically structured material consisting of hydroxyapatite crystallites with a diameter of around 50 nm and a length of several micrometers [1]. These crystallites are then bundled together and form prisms (with a diameter of around 5 µm) and interprismatic matrix that can be arranged in numerous ways. It has been the subject of a large number of studies in the last decades with an effort to understand the structure-property relation. However, the focus has been the role of prism arrangement and organization whereas the nature of the interfaces is poorly investigated. Literature often suggests that enamel crystallites are glued together by protein [2] and that prisms are surrounded by organic sheaths [1], [3]. A high resolution structural analysis revealed the local geometrical structure of the crystallite interfaces with a resolution ≤ 1 nm. Within this resolution the enamel prisms are surrounded by an interface that is discontinuous with frequent mineral to mineral contact separated by gaps. This contact manifests either by crystallites bridging the boundary between prismatic and interprismatic enamel or continuous crystallites curving and bridging the interprismatic enamel to the prisms. Contrary to existing structural descriptions of dental enamel structure in materials science literature, here the crystallites themselves are shown to be either in direct contact with each other, fusing together or are separated by gaps. These structural features contribute important understanding to both the architecture and mechanical properties of this biological material. A new structural model is proposed and the implications for the mechanical properties of dental enamel are discussed. In addition nanoindentation and micro-bending experiments for different sample conditions (chemical deproteination, heat treatment and wet/ dry) are conducted to investigate the influence of these conditions on the mechanical response.

References

[1] A.R. TenCate, A. Nanci, Ten Cate's oral histology, 7th ed., Mosby/Elsevier., St. Louis, Mo., 2008.

[2] M.C. Maas, E.R. Dumont, Built to last: The structure, function, and evolution of primate dental enamel, Evol. Anthropol. 8 (1999) 133–152. DOI: 10.1002/(SICI)1520-6505(1999)8:4<133::AID-EVAN4>3.0.CO;2-F

[3] L.H. He, M.V. Swain, Understanding the mechanical behaviour of human enamel from its structural and compositional characteristics, J. Mech. Behav. Biomed. 1 (2008) 18–29. DOI:10.1016/j.jmbbm.2007.05.001

Speaker:
Jasmin Koldehoff
Hamburg University of Technology
Additional Authors:
  • Prof. Dr. Michael V. Swain
    University of Sydney
  • Prof. Dr. Gerold A. Schneider
    Hamburg University of Technology

Dateien

Category Short file description File description File Size
Poster Koldehoff-17-Interfaces in Dental Enamel and Implications for Mechanical Properties Poster: Jasmin Koldehoff - Submission Number 17- Title: Interfaces in Dental Enamel and Implications for Mechanical Properties 3 MB Download
Presentation Koldehoff-17-Interfaces in Dental Enamel and Implications for Mechanical Properties Poster Pitch - Jasmin Koldehoff - Submission Number 17 - Interfaces in Dental Enamel and Implications for Mechanical Properties 7 MB Download