Studying the Impact Strength of Layered Denture Base Resin

Ismail

Taher

2022

JBBBE

Self Cite

This research has studied the addition effect of woven carbon fiber treated with NaOH and coated by β- TCP to the conventional polymethyl methacrylate (PMMA). Two stages are involved in the preparation of heat-cured acrylic denture composite. The first chemical treatment of woven carbon fiber (WCF) surface by different concentrations of NaOH (0.10, 0.15, and 0.20 M) and coating carbon fiber with β-TCP by various weight fractions (0.08, 0.10, and 0.12 wi) were carried out. The second stage includes the reinforcement of denture base material by treated and coated WCF. The functional groups of the WCF surface before and after alkali treatment were studied by FTIR. The morphology of the WCF surface before and after alkali treatment was observed by FESEM, the diameter of pores on the untreated and treated fibers, and the adhesion of β-TCP powder to the fiber was also observed. Mechanical tests include: impact strength (I.S.) and flexural strength (F.S) were calculated using a three-point bending test with a universal test machine and a Charpy impact test machine, respectively. From the result, reinforcing PMMA with treated and coated WCF improves the mechanical properties (impact and flexural strength).

Section: Introductionmentioning

confidence: 99%

Incorporation of Treated Woven Carbon Fiber to Methacrylate Resin for Heat-Cured Acrylic Denture Composite

Ismail

Taher

2022

JBBBE

Self Cite

The effect of acidic treatment of carbon fiber on denture mechanical properties

Taher

2021

J. Phys.: Conf. Ser.

The purpose of this research is to increase the mechanical properties (impact and flexural strength) of acrylic polymethyl methacrylate (PMMA) denture base resin by incorporated treated and coated woven carbon fiber (WCF). To increase the roughness of fibers, WCF treated with para-aminobenzoic acid (PABA), (C7H7NO2) at 3 different concentration treatments (0.10, 0.15, and 0.20 M). In order to make the samples appears with good aesthetic and bonding, WCF was coated with β-Tricalcium phosphate (β-TCP) powder with (0.08, 0.10, and 0.12) weight fraction (wi) in addition of using polyvinyl alcohol (PVA) at 0.01 wi, respectively. After 10 days of water storage at room temperature, the specimens have been tested via using the Charpy effect measuring system and three-point bending tests. The mechanism of interfacial interaction between β-TCP and woven carbon fibers was investigated by field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Based on the obtained results, when specimens contained treated and uncoated woven carbon fiber with a high concentration of (PABA), the impact and flexural strength were higher than pure sample but have a bad aesthetic. Further, (PMMA) reinforced with coated and treated woven carbon fiber as hybrid composites recorded very high raises in the mechanical properties when the concentration of (PABA) and (β-TCP) was increased, with a good aesthetic.

Impact strength of surface treated SS316L wires reinforced PMMA^**

Ibrahim

Lafta

Journal of the Mechanical Behavior of Materials

2021

Stainless steel 316L (SS316L) as a significant bio-material, their wires were used to support the PMMA matrix. Two simple and low-cost surface pretreatments for SS316L wires were performed to enhance denture impact strength: mechanical scratching (treating SS316L wires with SiC powder inside a rotating container) and electrochemical anodizing. Three mechanical scratching samples for different periods of 60, 90 and 120min were prepared. Anodizing technique conditions were: Ethylene glycol with perchloric acid as an anodizing solution, 15V supplying and graphite rod as an anode. Anodizing process involved three pretreating periods of 15, 20, and 30min. All the prepared samples had dimensions of 65 × 10 × 3 mm. SEM technique showed different morphology nature involved holes, scratches and pores with a density of 104/μm2 and a crack length of 60μm. The PMMA reinforced with scratched stainless steel 316L wire surface for 120 min presented the highest impact strength value (42 kJ/m2) with (450.91%) increment. Anodizing samples showed a fluctuating behavior of samples with enhancing in the impact strength of anodizing wire for 20min of about 26.99 kJ/m2, which is still lower than that for scratched samples in average.