In this section, you can access to the latest technical information related to the FUTURE project topic.

Frequency-related viscoelastic properties of the human incisor periodontal ligament under dynamic compressive loading

Abstract

Studies concerning the mechanical properties of the human periodontal ligament under dynamic compression are rare. This study aimed to determine the viscoelastic properties of the human periodontal ligament under dynamic compressive loading. Ten human incisor specimens containing 5 maxillary central incisors and 5 maxillary lateral incisors were used in a dynamic mechanical analysis. Frequency sweep tests were performed under the selected frequencies between 0.05 Hz and 5 Hz with a compression amplitude that was 2% of the PDL?s initial width. The compressive strain varied over a range of 4%-8% of the PDL?s initial width. The storage modulus, ranging from 28.61 MPa to 250.21 MPa, increased with the increase in frequency. The loss modulus (from 6.00 MPa to 49.28 MPa) also increased with frequency from 0.05 Hz? 0.5 Hz but remained constant when the frequency was higher than 0.5 Hz. The tan? showed a negative logarithmic correlation with frequency. The dynamic moduli and the loss tangent of the central incisor were higher than those of the lateral incisor. This study concluded that the human PDL exhibits viscoelastic behavior under compressive loadings within the range of the used frequency, 0.05 Hz? 5 Hz. The tooth position and testing frequency may have effects on the viscoelastic properties of PDL.

» Author: Bin Wu,  Panjun Pu,  Siyu Zhao,  Iman Izadikhah,  Haotian Shi,  Mao Liu,  Ruxin Lu,  Bin Yan,  Songyun Ma,  Bernd Markert

» Reference: https://doi.org/10.1371/journal.pone.0235822

» Publication Date: 13/07/2020

» More Information

« Go to Technological Watch



AIMPLAS Instituto Tecnológico del Plástico

C/ Gustave Eiffel, 4
(València Parc Tecnològic) - 46980
PATERNA (Valencia) - SPAIN

PHONE

(+34) 96 136 60 40

EMAIL

Project Management department - Sustainability and Industrial Recovery
life-future-project@aimplas.es