An alcohol-free tissue conditioner—A laboratory evaluation

Murata, Hiroshi; Narasaki, Y; Hamada, Takashi; McCabe, J.F.

doi:10.1016/j.jdent.2005.07.005

Cited by 27 publications

(7 citation statements)

References 22 publications

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“…For the silicone-based liners [3], the polymer is an elastomer (polydimethylsiloxane) that does not require an external plasticizer and, therefore, is more stable over time [2]. Other soft liners have been developed specifically as tissue conditioners [1, 4]. In these materials, the mixture of a polyethylmethacrylate powder and the liquid containing phthalates, ethanol, and no monomer results in the formation of a soft gel which readily flows to adapt to the supporting tissues [1, 5, 6].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Soft Denture Liners on L929 Fibroblasts, HaCaT Keratinocytes, and RAW 264.7 Macrophages

Chaves

Costa

Vergani

et al. 2014

BioMed Research International

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The effects of six soft liners (Ufi Gel P (UG), Sofreliner S (SR), Durabase Soft (D), Trusoft (T), Coe Comfort (CC), and Softone (ST)) on L929, HaCat, and RAW 264.7 cells were investigated. Eluates (24 and 48 h) from the materials were applied on the cells and the viability, type of cell death, and morphology were evaluated. Cells were also seeded on the specimens' surfaces (direct contact) and incubated (24 or 48 h), and viability was analyzed. Controls were cells in culture medium without eluates or specimens. For cell viability, no significant differences were found among materials or between extraction periods, and the liners were noncytotoxic or slightly cytotoxic. Morphology of RAW 264.7 cells was altered by the 24 h eluates from CC and D and the 48 h eluates from SR, CC, and D. The 24 and 48 h eluates from all materials (except T) increased the percentages of L929 necrotic cells. For direct contact tests, the lowest cytotoxicity was observed for UG and SR. Although eluates did not reduce viability, morphology alterations and increase in necrosis were seen. Moreover, in the direct contact, effects on viability were more pronounced, particularly for D, T, CC and ST. Thus, the use of UG and SR might reduce the risk of adverse effects.

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Section: Introductionmentioning

confidence: 99%

“…Both soft liners and tissue conditioners may release components as residual monomers, plasticizers, degradation products [7, 8], and alcohol [3, 4]. Substances released from these materials into saliva can then diffuse across the oral or gastrointestinal mucosa, causing adverse reactions [9–11].…”

Section: Introductionmentioning

confidence: 99%

Effects of Soft Denture Liners on L929 Fibroblasts, HaCaT Keratinocytes, and RAW 264.7 Macrophages

Chaves

Costa

Vergani

et al. 2014

BioMed Research International

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“…(1) Tissue conditioners are used as functional impression materials in addition to re-conditioners for denture bearing mucosa abused by ill-fitting dentures and temporary lining materials for immediate dentures. (7,8) Tissue conditioners exhibit viscoelastic behavior suitable for tissue conditioning and functional impression taking. Nevertheless, over time, tissue conditioners undergo a marked loss of initial viscoelastic properties, dimensional changes and reduction of detail reproduction due to the leaching of the plasticizer and alcohol components.…”

Section: Introductionmentioning

confidence: 99%

The influence of different immersion time intervals and disinfection of tissue conditioner functional impression materials on the surface roughness of stone cast

Binmahfooz

2018

Egyptian Dental Journal

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Tissue conditioners are used as a functional impression material, to re-condition the denturebearing mucosa abused by ill-fitting dentures and as a temporary lining material for immediate dentures. The immersion of tissue conditioners in disinfectant prior to pouring the impression can significantly affect the properties of dental stone depending on the duration of immersion. The present study aims to evaluate the effect of immersion time of tissue conditioner on the surface roughness of dental stone. Thirty specimens of tissue conditioner stone casts were prepared on cylindrical split aluminum with a lower hollow ring designed to receive the tissue conditioner and an upper ring adjusted to receive the stone mix. The thirty specimens of tissue conditioner were divided into 3 equal groups of 10 specimens according to the storage period (1hr, 24hrs and 48hrs). The three groups were subdivided into two subgroups: subgroup (a) 2% chlorhexidine (CHX) solution were sprayed on the surface of tissue conditioner specimens prior to pouring with dental stone materials while the other subgroup (b) specimens were poured with dental stone but without using (CHX) disinfection. The dental stone mixture was poured into molds and stored at room temperature for 60 minutes. The stone casts were then separated from the tissue conditioner and the surface roughness values of these dental stone casts was determined. Our results revealed a significant higher means values of surface roughness of groups (IIa and IIIa) when chlorhexidine was used compared to groups (IIb and IIIb). Comparison between subgroups (a and b) showed a statistical significance between (IIa and IIb) and (IIIa and IIIb). Based on the obtained results it can be concluded that the optimum time for using tissue conditioner as functional impression is from 24 to 48 hours after immersion. The use of 2% chlorhexidine solution disinfectant had adverse effect on surface roughness of dental stone.

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“…An example of a coating material that could be prepared is an acrylic resin coating material, termed "monopoly". This coating was used as a glaze on the acrylic resin obt-urator to achieve a smooth and a polished surface (15) , as the smooth surface is less susceptible to Candida growth than the rough one; also this coating material has been used to seal the surface of temporary soft lining materials to preserve the integrity and viscoelastic properties of these materials, by preventing movement of substances to or from the soft liner; thereby enhancing the longevity of these materials (16)(17)(18) .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Three Coating Materials on the Candidal Growth, on the Surface and Color of A heat–Cure Acrylic Resin Denture Base

Kandil¹,

Jaffer²,

Shehab³

2009

RDENTJ

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Aims:To evaluate the effect of three coating materials: Acrylic resin coating "monopoly", olive oil and grape seeds oil on the Candida albicans growth, and on color of a heat -cured acrylic resin denture base. Materials and methods: Three coating materials underwent pores method to find out their antifungal effect. The effect of coating materials on the acrylic denture base surface was determined via Sensitivity test in which twenty discs of acrylic resin 6mm diameter and 2mm thickness were prepared and divided into four groups: control (uncoated), monopoly, olive, and grape oil coated groups. These discs were added to Sabouraud Dextrose agar surface and incubated for 24 hours at 37 o C and the diameter of growth inhibition zones were measured. Then the Turbidity test was taken place, in which 60 acrylic specimens (1cm x 1cm x 2mm) were prepared and immersed in 60 test tubes that were divided into four groups, each group (15 specimens) was subdivided into three groups of incubation: 7, 20, and 30 days incubation period, each test tube contained 4 ml Brain Heart Infusion Broth, 0.1 ml of 24 hours Candida albicans, and its corresponding acrylic specimen, turbidity (yeast growth) was measured by a spectrophotometer at 530 nm wave length. For color change measurement test, 20 acrylic resin specimens (45 x 10 x 2.5 mm) were prepared and distributed into four studied groups. The absorbed light was measured by spectrophotometer and termed optical density at 345 nm. Results: All coating materials were fungicidal in pores method. Statistical analysis of sensitivity test showed that Candida albicans was susceptible at highest extent to monopoly coated denture base followed by the oils coated groups. In turbidity test, monopoly specimens showed antifungal activity in all periods of incubation, but the effect decreased gradually, olive and grape oil coated specimens exhibited their highest antifungal activity after 30 days incubation. Color change measurements showed that monopoly coated group had the highest optical density, while the olive and grape groups showed a decrease in the optical density when compared to uncoated group. Conclusions: Use of coating materials on the acrylic denture base surface was beneficial, especially monopoly in terms of antifungal activity against Candida albicans followed by natural oils (olive and grape oils). However, coating materials showed a significant change in the color of acrylic denture base.

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An alcohol-free tissue conditioner—A laboratory evaluation

Abstract: The coated alcohol-free tissue conditioner would be superior to the conventional materials containing ethyl alcohol in view of viscoelastic properties after gelation, compatibility with dental stones and durability.

Cited by 27 publications

References 22 publications

Effects of Soft Denture Liners on L929 Fibroblasts, HaCaT Keratinocytes, and RAW 264.7 Macrophages

Effects of Soft Denture Liners on L929 Fibroblasts, HaCaT Keratinocytes, and RAW 264.7 Macrophages

The influence of different immersion time intervals and disinfection of tissue conditioner functional impression materials on the surface roughness of stone cast

The Effect of Three Coating Materials on the Candidal Growth, on the Surface and Color of A heat–Cure Acrylic Resin Denture Base

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