Oral Health and Dental Management

Braiding thermoplastic and glass fibers in composite dental post improves their mechanical compatibility, in-vitro experiment

29^th Euro Congress and Expo on Dental and Oral Health

October 27, 2021 WEBINAR

Esraa M. Abdelkader

Helwan University, Egypt

Scientific Tracks Abstracts: OHDM

Abstract:

Mechanical compatibility with the human dentin is a considerable issue when fabricating dental fiber posts. To this purpose, this study introduces a new method of fabricating compatible dental posts using braiding techniques of thermoplastic fibers (matrix) with glass fibers (reinforcement). Fifty fiber-reinforced composite (FRC) posts of thermoplastic yarns polypropylene (PP) braided with continuous filaments glass fibers (GFs) for reinforcement, varying in fiber volume fraction (FVF), and core types are fabricated and tested. Posts are performed using a braiding machine, and braids are placed in an aluminium mold. The filled mold is placed inside an oven at the melting temperature of the polypropylene to produce the final post’s shape. An ultrasonic test is conducted to measure the shear modulus and Young’s modulus of FRC post specimens by measuring the velocities of both the P-wave and S-wave. In order to ensure the accuracy of the measurements, each sample is measured three times, and then the means and standard deviations of each sample are calculated before analyzing the test results using the means of two steps, namely, clustering and comparing the P and R² values of each cluster, which revealed that FVF, fiber mass, and core type of the specimen had a significant effect on the resulted Young’s and shear modulus. The results indicate that the proposed method can fabricate competitive dental posts with regard to different fabricating variables. The samples show Young’s modulus ranges of from 10.08 GPa to 31.83 GPa. The following tested hypothesis is supported the braiding technique of thermoplastic fibers with glass fibers will improve the mechanical compatibility of the resulting posts (ex vivo).

Biography :

Esraa M. Abdelkader has her expertise in the industrial, teaching, and research fields and her passion in the material science sector is to improve the research field to discover novel patents helping in enhancing the wellbeing and the quality of life for the humanity. Her open and excessive work creates new pathways for improving and easing the composite manufacturing process and consequently many applications including the dental applications. Her master Degree is in Textile engineering from Helwan University, she used to work in the industrial field for almost six years and now she is working as a lecturer in Badr University in Cairo. Her PhD. is a channel one between Helwan University in Egypt and Granada University in Spain, specialized in the material science and composites fields.