Rapid curing of bonding composite with a xenon plasma arc light

Oesterle, Larry J.; Newman, Sheldon M.; Shellhart, W. Craig

doi:10.1067/mod.2001.113652

Cited by 83 publications

(65 citation statements)

References 12 publications

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“…10 When this blade was laid over the mold, the bracket was situated in the middle of the acrylic block, and the edges of the bracket base were parallel to the edges of the block. After storage for 24 hours in the dark at 37°C 2,12,20 in water, 21 the acrylic block with the bonded tooth was secured onto the lower jaw of the testing machine. The shear bond force was applied by the rod.…”

Section: Methodsmentioning

confidence: 99%

“…However, the bond strength values measured in this study are common in analogous studies. 2,9,12,20 One must also consider that in-vivo bond strength values are lower. 28 The site of bond failure was unaffected by light source and curing time.…”

mentioning

confidence: 99%

“…1 In addition, only part of the halogen light spectrum is useful because the absorption spectrum of camphorquinone is comparatively narrow. 2 To reduce curing time, light sources with higher power densities have been introduced.…”

mentioning

confidence: 99%

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Light-curing time reduction with a new high-power halogen lamp

Staudt¹,

Mavropoulos²,

Bouillaguet³

et al. 2005

American Journal of Orthodontics and Dentofacial Orthopedics

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Introduction: Orthodontic brackets are routinely bonded with light-cured adhesives. Conventional halogen lights used in bonding have the disadvantage of a long curing time, and the available alternatives (laser and plasma lights) are expensive. Our aim was to investigate the minimum time necessary to bond brackets with a new, relatively low-priced, high-power halogen light. Methods: Five groups of 15 deciduous bovine incisors were bonded with stainless steel brackets (Mini Diamond Twin, Ormco, Orange, Calif) by using different lamps and curing times. Three of the groups were bonded by using a high-power halogen light (Swiss Master Light, Electro Medical Systems, Nyon, Switzerland) for 2, 3, and 6 seconds, respectively. The fourth group, bonded with a fast halogen light (Optilux 501, Sybron Dental Specialties, Danbury, Conn) for 40 seconds, served as the positive control group. The fifth group, the comparison group, was bonded with a plasma light (Remecure, Remedent, Deurle, Belgium) for 4 seconds. After storage for 24 hours in the dark at 37°C in water, shear bond strength was measured with a universal testing machine. Results: A curing time of 2 seconds with the high-power halogen light negatively affected the bond strength and the probability of bond survival. The adhesive remnant index scores were not significantly different among the groups. Most failures (Ͼ 60%) occurred at the bracket base/adhesive interface. Conclusions: The high-power halogen light seems to be a cost-effective solution to reducing curing time. The recommended curing times to bond stainless steel brackets are 6 seconds and, with caution, even 3 seconds. (Am J Orthod Dentofacial Orthop 2005;128:749-54)

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Light-curing time reduction with a new high-power halogen lamp

Staudt¹,

Mavropoulos²,

Bouillaguet³

et al. 2005

American Journal of Orthodontics and Dentofacial Orthopedics

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“…14 Moreover, Oesterle et al 14 indicated that, because the brackets are free floating, shrinkage can pull the brackets closer to the enamel. Therefore, it is believed that polymerization shrinkage and concomitant microleakage are matters of minimal concern in orthodontic applications.…”

Section: Introductionmentioning

confidence: 99%

“…12 According to the manufacturer instructions, these devices reduce polymerization time to 3 to 10 seconds, and they minimize polymerization shrinkage. 13 Although reduced curing times offer advantages for the orthodontist and for the patient, 14 rapid curing of composites may cause excessive shrinkage and gap formation along the resin/preparation interface. 15,16 These gaps may cause seeping and leakage of oral fluids and bacteria between the tooth and restoration surface, an event that defines microleakage in dentistry.…”

Section: Introductionmentioning

confidence: 99%

Effects of High-Intensity Curing Lights on Microleakage under Bonded Lingual Retainers

Baysal

Uysal

Ülker

et al. 2008

The Angle Orthodontist

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Objective: To evaluate the effects of high-intensity light curing units (light-emitting diode [LED] and plasma arc curing [PAC]) on the microleakage of flexible spiral wire retainers (FSWRs) at the composite/enamel and composite/wire interfaces. Materials and Methods: Forty-five human mandibular incisor teeth were separated into three groups of 15 teeth. Multistranded PentaOne wire of .0215 inch diameter was bonded to enamel and was cured with three different light curing units: a quartz-tungsten-halogen (QTH) unit and two high-intensity units (ie, LED and PAC). A conventional halogen light served as the control. Samples were sealed with nail varnish, stained with 0.5% basic fuchsine, and sectioned. Transverse sections were evaluated under a stereomicroscope and were scored for microleakage for the composite/enamel and composite/wire interfaces. Statistical analysis was performed by Kruskal-Wallis and Mann-Whitney U-tests with Bonferroni correction. Results: Little or no microleakage was detected at the composite/enamel interface of the FSWR cured with three different light sources. However, at the composite/wire interface, statistically significant differences were found between the QTH (mean, 1.10 Ϯ 1.05 mm) and high-intensity curing units. The PAC resulted in the greatest amount of microleakage (mean, 2.63 Ϯ 1.49 mm), whereas no statistically significant difference was noted between the PAC and the LED (mean, 2.35 Ϯ 1.28 mm). Conclusion: High-intensity light curing units show statistically significant microleakage at the composite/wire interface and therefore may not be safe for use in bonding FSWRs.

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Nanocomposites of styrene–butadiene rubber and synthetic anatase obtained by a colloidal route and their photooxidation

Arantes

Leite

Longo

et al. 2009

J of Applied Polymer Sci

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Photodegradable styrene-butadiene rubber (SBR)/TiO 2 nanocomposites were prepared by a colloidal route through the simple mixing of a commercial polymer latex and synthetic anatase nanoparticles. Stable colloids of pure anatase TiO 2 nanoparticles with an average diameter of 7 nm were prepared by a solvothermal route from the hydrolysis of titanium alkoxide by hydrogen peroxide in the presence of oleic acid. The photocatalytic degradation of the SBR-TiO 2 nanocomposites was carried out in ambient air at room temperature under a UV lamp and was monitored by Fourier transform infrared and UV-visible spectroscopies and differential scanning calorimetry. The results show that the SBR-TiO 2 nanocomposites were photocatalytically degraded under UV light, which indicate that the butadiene chains in the nanocomposite were oxidized during UV irradiation. Thermal analysis measurements indicated that crosslinking reactions occurred. The presence of anatase TiO 2 nanoparticles was found to accelerate the photocatalytic process, and the degradation mechanism was similar to that of the pure SBR polymer.

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Rapid curing of bonding composite with a xenon plasma arc light

Cited by 83 publications

References 12 publications

Light-curing time reduction with a new high-power halogen lamp

Light-curing time reduction with a new high-power halogen lamp

Effects of High-Intensity Curing Lights on Microleakage under Bonded Lingual Retainers

Nanocomposites of styrene–butadiene rubber and synthetic anatase obtained by a colloidal route and their photooxidation

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