scholarly journals Effect of short curing times with a high-intensity light-emitting diode or high-power halogen on shear bond strength of metal brackets before and after thermocycling

2011 ◽  
Vol 81 (3) ◽  
pp. 510-516 ◽  
Author(s):  
Erion Cerekja ◽  
Banu Cakirer
Keyword(s):  
Bond Strength ◽  
High Power ◽  
High Intensity ◽  
Shear Bond Strength ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Before And After ◽  
High Intensity Light

scholarly journals Microleakage under Orthodontic Brackets Using High-Intensity Curing Lights

2009 ◽  
Vol 79 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Mustafa Ulker ◽  
Tancan Uysal ◽  
Sabri Ilhan Ramoglu ◽  
Huseyin Ertas
Keyword(s):  
High Intensity ◽  
Light Emitting Diode ◽  
Bonferroni Correction ◽  
Light Emitting ◽  
Halogen Light ◽  
Halogen Light Source ◽  
Light Curing ◽  
Curing Light ◽  
High Intensity Light ◽  
Nail Varnish

Abstract Objective: To compare the microleakage of the enamel-adhesive-bracket complex at the occlusal and gingival margins of brackets bonded with high-intensity light curing lights and conventional halogen lights. Materials and Methods: Forty-five freshly extracted human maxillary premolar teeth were randomly separated into three groups of 15 teeth each. Stainless steel brackets were bonded in all groups according to the manufacturer's recommendations. Specimens (15 per group) were cured for 40 seconds with a conventional halogen light, 20 seconds with light-emitting diode (LED), and 6 seconds with plasma arc curing light (PAC). After curing, the specimens were further sealed with nail varnish, stained with 0.5% basic-fuchsine for 24 hours, sectioned and examined under a stereomicroscope, and scored for microleakage for the enamel-adhesive and bracket-adhesive interfaces from both the occlusal and gingival margins. Statistical analyses were performed using Kruskal-Wallis and Mann-Whitney U-tests with a Bonferroni correction. Results: The type of light curing unit did not significantly affect the amount of microleakage at the gingival or occlusal margins of investigated interfaces (P >.05). The gingival sides in the LED and PAC groups exhibited higher microleakage scores compared with those observed on occlusal sides for the enamel-adhesive and adhesive-bracket interfaces. The halogen light source showed similar microleakage at the gingival and occlusal sides between both adhesive interfaces. Conclusions: High-intensity curing units did not cause more microleakage than conventional halogen lights. This supports the use of all these curing units in routine orthodontic practice.

Retinal damage related to high-intensity light-emitting diode exposure: An in vivo study

2021 ◽  
Author(s):  
Marcela Emílio de Araújo ◽  
Marina Bozzini Paies ◽  
Ana Beatriz Arrais ◽  
Fernando Ladd Lobo ◽  
Ruthnaldo Rodrigues Melo de Lima ◽  
...  
Keyword(s):  
High Intensity ◽  
Light Emitting Diode ◽  
In Vivo Study ◽  
Retinal Damage ◽  
Light Emitting ◽  
High Intensity Light

Curing efficiency of high-intensity light-emitting diode (LED) devices

2010 ◽  
Vol 52 (2) ◽  
pp. 187-195 ◽  
Author(s):  
Christos Rahiotis ◽  
Katerina Patsouri ◽  
Nick Silikas ◽  
Afrodite Kakaboura
Keyword(s):  
High Intensity ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
High Intensity Light

Curing Efficiency of Three Different Curing Modes at Different Distances for Four Composites

2011 ◽  
Vol 36 (4) ◽  
pp. 362-371 ◽  
Author(s):  
S Zhu ◽  
J Platt
Keyword(s):  
Exposure Time ◽  
High Intensity ◽  
Clinical Relevance ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Curing Light ◽  
Deep Cavities ◽  
High Intensity Light

Clinical Relevance Doubling the exposure time of a high-intensity light-emitting diode curing light with a turbo tip and autofocus capability does not predictably compensate for distance in deep cavities.

Shear Bond Strength of Orthodontic Bonding Materials Polymerized by High-Intensity LEDs at Different Intensities and Curing Times

2016 ◽  
Vol 723 ◽  
pp. 376-381
Author(s):  
Borisorn Udomthanaporn ◽  
Passiri Nisalak ◽  
Pornrachanee Sawaengkit
Keyword(s):  
Bond Strength ◽  
High Intensity ◽  
Shear Bond Strength ◽  
Light Emitting Diode ◽  
Orthodontic Bracket ◽  
Exact Test ◽  
Significant Difference ◽  
Tooth Surfaces ◽  
Group 3 ◽  
Group 2

To evaluate and compare shear bond strength (SBS) and Adhesive Remnant Index (ARI) of orthodontic brackets polymerized by high-intensity light-emitting diode (LED) curing units at different intensities and curing times. Sixty extracted human upper premolar teeth were divided into 3 groups of 20 each. The tooth surfaces were prepared and the brackets were bonded on the teeth with light-cured adhesive and cured with 3 different light-curing units and conditions; Group 1 (Bluephase, 1,200 mW/cm2, 20 seconds), Group 2 (VALO, 3,200 mW/cm2, 6 seconds), Group 3 (FlashMax P3, 4,000-6,000 mW/cm2, 3 seconds). Shear bond strength of the specimens were tested after bracket bonding for 5 minutes. The means of shear bond strength among groups were compared by Kruskal-Wallis and Mann-Whitney U tests. ARI were tested by the Fisher's exact test (p < 0.05). The means and standard deviations of SBS in groups 1, 2 and 3 were 21.80 ± 2.85, 21.04 ± 2.87 and 4.75 ± 2.82 MPa, respectively. Group 3 had significantly lowest mean SBS. Significant difference of ARI was found between Bluephase and VALO groups (p = .010). FlashMax P3 curing at 3 seconds generated significantly lowest mean SBS among 3 groups. The SBS generated by VALO curing at 6 seconds was not significantly different from Bluephase curing at 20 seconds. Therefore, VALO can be an option for orthodontic bracket bonding benefited in reducing clinician chairtime and patient discomfort.

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