Effectiveness of polymerization of a prosthetic composite using three polymerization systems

Tanoue, Naomi; Matsumura, Hideo; Atsuta, Mitsuru

doi:10.1016/s0022-3913(99)70089-2

Cited by 21 publications

(11 citation statements)

References 27 publications

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“…These studies have suggested that there was no significant difference in various physical and mechanical properties between the one-step and two-step curing methods. While lower light intensity improves marginal adaptation, some reports claimed that high light intensity achieves sufficient depth of polymerization, high degree of conversion, high mechanical properties, and a low residual monomer concentration (10).…”

Section: Introductionmentioning

confidence: 99%

Effects of various light curing methods on the leachability of uncured substances and hardness of a composite resin

Moon¹,

Lee²,

Lim³

et al. 2004

J of Oral Rehabilitation

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The purpose of this study was to evaluate the effect of the various light curing units (plasma arc, halogen and light-emitting diodes) and irradiation methods (one-step, two-step and pulse) using different light energy densities on the leachability of unreacted monomers (Bis-GMA and UDMA) and the surface hardness of a composite resin (Z250, 3M). Leachability of the specimens immersed for 7 days in ethanol was analysed by HPLC. Vicker's hardness number (VHN) was measured immediately after curing (IC) and after immersion in ethanol for 7 days. Various irradiation methods with three curing units resulted in differences in the amount of leached monomers and VHN of IC when light energy density was lower than 17.0 J cm(-2) (P = 0.05). However, regardless of curing units and irradiation methods, these results were not different when the time or light energy density increased. When similar light energy density was irradiated (15.6-17.7 J cm(-2)), the efficiency of irradiation methods was different by the following order: one-step > or = two-step > pulse. These results suggest that the amount of leached monomers and VHN were influenced by forming polymer structure in activation and initiation stages of polymerization process with different light source energies and curing times.

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Section: Introductionmentioning

confidence: 99%

Effects of various light curing methods on the leachability of uncured substances and hardness of a composite resin

Moon¹,

Lee²,

Lim³

et al. 2004

J of Oral Rehabilitation

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show abstract

“…Furthermore, the colour stability of composite material is also related to immersion in water (Asmussen, 1981; Ruyter et al ., 1987; Brauer, 1988; Peutzfeldt & Asmussen, 1990). According to Tanoue, Matsumura and Atsuta (1998, 1999), water solubility of light‐activated prosthetic composite is so strongly related to curing mode that it can be significantly reduced by the use of a high‐intensity light‐curing unit. The successful polymerization of light‐activated composite material may provide high degree of conversion, and lead to sufficient colour stability and solubility.…”

Section: Introductionmentioning

confidence: 99%

Properties of dual‐curable luting composites polymerized with single and dual curing modes

Tanoue

Koishi

Atsuta

et al. 2003

J of Oral Rehabilitation

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The purpose of this study was to evaluate the influence of visible-light exposure on water absorption, solubility and colour stability of dual-curable luting composites. Using eight dual-curable luting composites (2bond2, Bistite II, G-CERA Cosmotech II, Imperva Dual, Linkmax, Lute-It, Panavia Fluoro Cement and Variolink II), disk specimens were prepared by the following two methods: (i) dual-cured specimens; exposed with visible-light from a light-curing unit, and (ii) chemical-cured specimens; chemically polymerized without exposure. Five specimens were produced for each material and curing mode. Water absorption and solubility were determined according to standardized testing methods, and the data were compared using analysis of variance (ANOVA) and contrasts. With regard to colour stability, the colour difference (DeltaE*) values between 24 h and the other immersion periods (1, 2, 3, 4, 8, 12, 16, 20 and 24 weeks) were calculated and then analysed by repeated measure ANOVA. The dual-cured specimens exhibited significantly lower solubility values than the chemical-cured specimens except for the Lute-It material. The dual-cured Linkmax material exhibited the lowest solubility (0.51 +/- 0.01 microg mm(-3)) and the lowest DeltaE* value after 24 weeks (2.64 +/- 0.39). The dual-curable luting composites should be light-exposed after seating of restorations in order to reduce water absorption and solubility, and to improve colour stability.

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“…In recent years, prosthetic composite material has become popular for use in various prosthetic restorations, due to large improvement in physical and mechanical properties [1]. Prosthetic composite is now applicable for a variety of prosthetic restorations, although abrasion of the composite is viewed as a major disadvantage.…”

Section: Introductionmentioning

confidence: 99%

Wear and surface roughness of current veneered materials after toothbrush/dentifrice abrasion

Abouelatta

Abdel-Samad

Sakrana

2005

Journal of Materials Processing Technology

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Effectiveness of polymerization of a prosthetic composite using three polymerization systems

Cited by 21 publications

References 27 publications

Effects of various light curing methods on the leachability of uncured substances and hardness of a composite resin

Effects of various light curing methods on the leachability of uncured substances and hardness of a composite resin

Properties of dual‐curable luting composites polymerized with single and dual curing modes

Wear and surface roughness of current veneered materials after toothbrush/dentifrice abrasion

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