Evaluation of the Effects of Hemp Fiber Addition on Fracture Strength, Acrylic Tooth Bonding and Water Absorption of Polymethyl Methacrylate

Authors : Fatma Dilara Baysan, Süha Kuşçu, Nesrin Korkmaz, Nilüfer Çelebi
Pages : 14-19
Doi:10.15311/selcukdentj.1483484
View : 55 | Download : 59
Publication Date : 2025-04-21
Article Type : Research Paper
Abstract :ABSTRACT Background: In this study, it was aimed to evaluate the effect of adding hemp fiber to polymethyl methacrylate (PMMA), the most commonly used heat-polymerized base material for dental prosthesis, on the fracture strength of the denture, its connection to the acrylic tooth and water absorption. Methods: Three main working groups were formed in this study: PMMA (group-A) with the addition of raw hemp fiber, PMMA (group-B) with the addition of lignin and pectin removed hemp fiber, and PMMA without added fiber (group-C). Shear bond strength test was performed to evaluate how the addition of hemp fiber to PMMA affects the connection to the acrylic tooth. Three-point bending test was applied to measure the breaking strength of the base material. The effect of adding hemp fiber to PMMA on water absorption was evaluated. Results: There was no statistically significant difference between the study groups in terms of shear bond strength test mean values (p=0.122). There was no statistically significant difference between the study groups in terms of three-point bending test mean values (p=0.140). In this study, it was determined that the addition of raw and chemically treated hemp fiber significantly reduced the water absorption of the acrylic base material (p<0.001). Conclusions: It has been observed that the addition of hemp fiber in two different forms (raw and processed) to the PMMA reduces the water absorption of this material. It was determined that the addition of hemp fiber did not have a significant effect on the connection of the base to the acrylic tooth and its fracture strength. Keywords: denture prosthesis, hemp, PMMA
Keywords : dental protez, kenevir, PMMA

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