Effect of infection control barrier thickness on light curing units

Chang, Hoon-Sang; Lee, Seok-Ryun; Hong, Sung-Ok; Ryu, Hyun-Wook; Song, Chang‐Kyu; Min, Kyung-San

doi:10.5395/jkacd.2010.35.5.368

Cited by 7 publications

(9 citation statements)

References 10 publications

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“…These interactions could be explained by the curing light diffusion of LCUs. In our previous study, curing light diffusion of LED LCUs was measured as 75.0 ± 0.8 degrees, whereas that of halogen LCUs was measured as 48.3 ± 3.1 degrees 15. It could be possible that the difference in curing light diffusion affected the curing light transmission through resin inlays and caused the interaction between the layer shades and the LCUs.…”

Section: Discussionmentioning

confidence: 92%

“…Thorough light curing, therefore, depends on light penetration to a desired depth through resin inlays that may prevent such penetration 13. For polymerization of composite resins, curing light with a minimum intensity of 300 mW/cm 2 is required 14,15. Therefore, to polymerize dual-cure resin cements, curing light must have an intensity of at least 300 mW/cm 2 after transmitting through the resin inlay.…”

Section: Introductionmentioning

confidence: 99%

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Power density of various light curing units through resin inlays with modified layer thickness

Hong

Min

et al. 2012

Restor Dent Endod

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ObjectivesThe purpose of this study was to enhance curing light penetration through resin inlays by modifying the thicknesses of the dentin, enamel, and translucent layers.Materials and MethodsTo investigate the layer dominantly affecting the power density of light curing units, resin wafers of each layer with 0.5 mm thickness were prepared and power density through resin wafers was measured with a dental radiometer (Cure Rite, Kerr). The dentin layer, which had the dominant effect on power density reduction, was decreased in thickness from 0.5 to 0.1 mm while thickness of the enamel layer was kept unchanged at 0.5 mm and thickness of the translucent layer was increased from 0.5 to 0.9 mm and vice versa, in order to maintain the total thickness of 1.5 mm of the resin inlay. Power density of various light curing units through resin inlays was measured.ResultsPower density measured through 0.5 mm resin wafers decreased more significantly with the dentin layer than with the enamel and translucent layers (p < 0.05). Power density through 1.5 mm resin inlays increased when the dentin layer thickness was reduced and the enamel or translucent layer thickness was increased. The highest power density was recorded with dentin layer thickness of 0.1 mm and increased translucent layer thickness in all light curing units.ConclusionsTo enhance the power density through resin inlays, reducing the dentin layer thickness and increasing the translucent layer thickness would be recommendable when fabricating resin inlays.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Power density of various light curing units through resin inlays with modified layer thickness

Hong

Min

et al. 2012

Restor Dent Endod

Self Cite

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“…In the present study, since all the tested barriers have significantly reduced the baseline LI of LCU [ Table 1 and Graph 1 ], the null hypothesis was rejected. These results are in agreement with those of Chong et al .,[ 7 ] Scott et al .,[ 8 ] Chang et al .,[ 17 ] and McAndrew et al . [ 18 ]…”

Section: Discussionmentioning

confidence: 99%

“…Differences in the mean intensities among different ICB can be attributed to its transparency,[ 20 ] thickness of the tested barriers,[ 17 ] presence of folds,[ 21 22 ] and formation of air pouch between light tip and barrier. [ 8 23 ]…”

Section: Discussionmentioning

confidence: 99%

Evaluation of effect of different disposable infection control barriers on light intensity of light-curing unit and microhardness of composite - An in vitro study

et al. 2017

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Aims:This study evaluated effect of infection control barriers on light intensity (LI) of light-curing unit (LCU) and microhardness of composite.Materials and Methods:Four different disposable barriers (n = 30) were tested against the control. LI for each barrier was measured with Lux meter. One hundred and fifty Teflon molds were equally divided into five groups of thirty each. Composite was filled in bulk in these molds and cured without and with barrier. Microhardness was evaluated on top and bottom surface of composite specimen with microhardness testing machine and hardness ratio (HR) was derived.Statistical Analysis Used:One-way analysis of variance, Tukey's honestly significant difference test, and paired t-test using SPSS version 18 software.Results:All barriers had significantly reduced the baseline LI of LCU (P < 0.0001), but only Cure Elastic Steri-Shield and latex cut glove pieces (LCGP) significantly reduced the microhardness of the composite (P < 0.05). However, HR determined inadequate curing only with LCGP.Conclusions:Although entire tested barrier significantly reduced the LI; none, except LCGP markedly affected the degree of cure of the composite.

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“…Therefore, using a multi-layer infection control barrier could reduce the risk of cross infection. However, a multi-layer infection control barrier was reported to reduce the light output of the LCUs 9 and consequently could affect the polymerization of the composite resin.…”

Section: Introductionmentioning

confidence: 99%

Effect of a multi-layer infection control barrier on the micro-hardness of a composite resin

et al. 2012

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ObjectiveThe aim of this study was to evaluate the effect of multiple layers of an infection control barrier on the micro-hardness of a composite resin. Material and MethodsOne, two, four, and eight layers of an infection control barrier were used to cover the light guides of a high-power light emitting diode (LED) light curing unit (LCU) and a low-power halogen LCU. The composite specimens were photopolymerized with the LCUs and the barriers, and the micro-hardness of the upper and lower surfaces was measured (n=10). The hardness ratio was calculated by dividing the bottom surface hardness of the experimental groups by the irradiated surface hardness of the control groups. The data was analyzed by two-way ANOVA and Tukey's HSD test. ResultsThe micro-hardness of the composite specimens photopolymerized with the LED LCU decreased significantly in the four- and eight-layer groups of the upper surface and in the two-, four-, and eight-layer groups of the lower surface. The hardness ratio of the composite specimens was <80% in the eight-layer group. The micro-hardness of the composite specimens photopolymerized with the halogen LCU decreased significantly in the eight-layer group of the upper surface and in the two-, four-, and eight-layer groups of the lower surface. However, the hardness ratios of all the composite specimens photopolymerized with barriers were <80%. ConclusionsThe two-layer infection control barrier could be used on high-power LCUs without decreasing the surface hardness of the composite resin. However, when using an infection control barrier on the low-power LCUs, attention should be paid so as not to sacrifice the polymerization efficiency.

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Effect of infection control barrier thickness on light curing units

Cited by 7 publications

References 10 publications

Power density of various light curing units through resin inlays with modified layer thickness

Power density of various light curing units through resin inlays with modified layer thickness

Evaluation of effect of different disposable infection control barriers on light intensity of light-curing unit and microhardness of composite - An in vitro study

Effect of a multi-layer infection control barrier on the micro-hardness of a composite resin

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