RT Journal Article
T1 Braiding Thermoplastic and Glass Fibers in Composite Dental Post Improves Their Mechanical Compatibility, In Vitro Experiment
A1 Abdelkader, Esraa M.
A1 Nassar, Khaled
A1 Melchor, Juan
A1 Rus, Guillermo
K1 Dental materials
K1 Root canal posts
K1 Fiber-reinforced composites (FRCs)
K1 Young’s modulus
K1 Shear modulus
K1 Fiber volume fraction (FVF)
K1 Endodontic
K1 Fiberglass
K1 Polypropylene
K1 Materiales dentales
K1 Cavidad pulpar
K1 Módulo de elasticidad
K1 Diente no vital
K1 Polipropilenos
AB 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 aluminum mold. The filled mold is playced 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).
PB MDPI
YR 2021
FD 2021-04-29
LK http://hdl.handle.net/10668/4466
UL http://hdl.handle.net/10668/4466
LA en
NO Abdelkader EM, Nassar K, Melchor J, Rus G. Braiding Thermoplastic and Glass Fibers in Composite Dental Post Improves Their Mechanical Compatibility, In Vitro Experiment. Materials. 2021 Apr 29;14(9):2294
DS RISalud
RD Apr 9, 2025