The effect of various frequencies of ultrasonic cleaner in reducing residual monomer in acrylic resin

Charasseangpaisarn, Taksid; Wiwatwarrapan, Chairat

doi:10.1016/j.ultras.2015.07.005

Cited by 17 publications

(22 citation statements)

References 27 publications

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“…This residual monomer reduction method was recommended because the leaching of residual monomer from acrylic resin was significantly higher in the first 24 hours. The reduction method of residual monomer by ultrasonic treatment was also not significantly different from the control group, as found by Charasseangpaisarn and Wiwatwarrapan 21 . The remaining residual monomer in heat-polymerized acrylic resin that could not be extracted can be explained by the non-extractable monomer theory that residual monomer is still trapped in long polymer chain molecules after various monomer reduction treatments 28 …”

Section: Discussionmentioning

confidence: 66%

“…Cravotto et al 20 used ultrasonic treatment to improve the extraction of oils from plants, and found that ultrasound treatment enhanced the release of soluble compounds from plant material, enhanced mass transfer, and facilitated solvent access into the cells. Charasseangpaisarn and Wiwatwarrapan 21 found that using an ultrasonic cleaner with different frequencies reduced the residual monomer in acrylic resin to the same extent as previously recommended methods (immersion in room temperature water for heat-polymerized resins or immersion in 50°C water for 1 hour for autopolymerized resins).…”

Section: Introductionmentioning

confidence: 59%

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Ultrasonic cleaning reduces the residual monomer in acrylic resins

Charasseangpaisarn

Wiwatwarrapan

Leklerssiriwong³

2016

Journal of Dental Sciences

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Background/purpose The residual monomer remaining in acrylic resin can cause an allergic reaction and is toxic to oral soft tissue. This study determined the effect of the duration of ultrasonic cleaning on the amount of residual methyl methacrylate monomer in one heat-polymerized acrylic resin, Meliodent, and three autopolymerized acrylic resins, Unifast Trad Ivory, Unifast Trad Pink, and Unifast III. Materials and methods Thirty-six disc-shaped specimens of each brand were prepared and randomly divided into six groups: control (no treatment), positive control, and ultrasonic treatment in 50°C water for 3 minutes, 5 minutes, 10 minutes, or 15 minutes. The residual monomer was extracted and analyzed using high performance liquid chromatography. Results There were no significant differences in the residual monomer amount in the Meliodent groups. The amounts of residual monomer in the autopolymerized acrylic resin positive control group and ultrasonic treatment groups were significantly lower than those of the control group for the Unifast Trad Ivory, Unifast Trad Pink, and Unifast III groups (P < 0.05). The amount of residual monomer was not significantly different between the ultrasonic treatment in 50°C water (3 minutes for Unifast Trad Pink and 5 minutes for Unifast Trad Ivory and Unifast III) groups and the positive control group (P > 0.05). Conclusion Ultrasonic treatment with 50°C water for 3–5 minutes for autopolymerized resin and 3 minutes for heat-polymerized acrylic resin reduced the amount of residual monomer similarly to previously recommended methods, using shorter treatment times.

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Section: Discussionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 59%

Ultrasonic cleaning reduces the residual monomer in acrylic resins

Charasseangpaisarn

Wiwatwarrapan

Leklerssiriwong³

2016

Journal of Dental Sciences

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“…In previous studies, Charasseangpaisarn and Wiwatwarrapan [49,54] found that the use of an ultrasonic treatment at several frequencies reduced the presence of residual monomer in acrylic resins. For example, heat-polymerized MMA by the immersion in water at 50°C for…”

Section: Thermal Polymerization Assisted With Ultrasoundmentioning

confidence: 97%

New Trends for the Processing of Poly(Methyl Methacrylate) Biomaterial for Dental Prosthodontics

Arenas‐Arrocena¹,

Argueta-Figueroa²,

RenéGarcía-Contreras³

et al. 2017

Acrylic Polymers in Healthcare

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Rehabilitation of masticatory function in patients with absent teeth with removable dentures is an established form of treating partial or complete dentition in edentulous patients. The developments in recent decades with dental implants dominate current dental research. However, medical contraindications, a negative attitude toward implants, or financial limitations on the part of the patients limit their universal applicability, so the rehabilitation with dental prostheses still makes up a significant portion of everyday clinical practice. Conversely, removable dentures are used in the critical conditions of the oral cavity. There are about 500 strains of microorganisms in the mouth, which form the biofilm in an acidic environment causing several issues, such as denture stomatitis, deterioration of the periodontal status of the remaining teeth, or carious lesions in the supporting teeth. Therefore, it is very important to choose a suitable material for the prosthesis. Poly(methyl methacrylate) (PMMA) is an acrylic resin usually used with a long tradition for prosthetic purposes. The aim of this chapter is to present the trends for the processing of PMMA. It includes the chemical synthesis, conventional thermal processing of this acrylic resin, the new processing technique assisted with ultrasound, the antibacterial effect on PMMA with nanoparticles, and the cytotoxicity, genotoxicity, and mutagenesis of this material.

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“…An aqueous channel/pathway is required for chlorhexidine release from resin composites, so the influence of ultrasonication on this process may be dramatic. In particular, removal of residual monomer has been demonstrated in auto-polymerized PMMA at low ultrasonic frequency (28 kHz) [45]. The thermal effects generated by ultrasonication should also be taken into consideration [46], since the influence of ultrasound on gentamicin release was equal to a 3°C increase in temperature [22].…”

Section: 7)mentioning

confidence: 99%