Analysis of temperature increase in swine gingiva after exposure to a Polywave® LED light curing unit

Cristiane Maucoski, Driellen Christine Zarpellon, Fabio Andre dos Santos, Leandro Cavalcante Lipinski, Eduardo Bauml Campagnoli, Frederick Rueggeberg, Cesar Augusto Galvão Arrais

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objective This study evaluated the temperature increase in swine gingival temperature after exposure to light emitted by a Polywave® LED light curing unit (LCU, Bluephase 20i, Ivoclar Vivadent). Methods After local Ethics Committee approval (protocol 711/2015), 40 pigs were subjected to general anesthesia and the LCU tip was placed 5 mm from the buccal gingival tissue (GT) close to lower lateral incisors. A thermocouple probe (Thermes WFI, Physitemp) was inserted into the gingival sulcus before and immediately after exposure to light. Real-time temperature (°C) was measured after the following exposure modes were applied: High Power (20s-H, 40s-H, and 60s-H) or Turbo mode (5s-T), either with or without the presence of rubber dam (RD) interposed between the LCU tip and GT (n = 10). The presence of gingival lesions after the exposures was also evaluated. Peak temperature (°C) and the temperature increase during exposure over that of the pre-exposure baseline value (ΔT) data were analyzed using 2-way ANOVA followed by Bonferroni's post-hoc test (α = 5%). A binary logistic regression analysis determined the risk of gingival lesion development. Results Without RD, no significant difference in ΔT was observed among 20s-H, 40s-H, and 60s-H groups, which showed the highest temperature values, while the 5s-T exposure showed the lowest ΔT, regardless of RD. RD reduced ΔT only for the 20s-H group (p = 0.004). Gingival lesions were predominantly observed using 40s-H, with RD, and 60s-H, with and without RD. Significance Exposure to a LCU light might be harmful to swine gingiva only when high radiant exposure values are delivered, regardless of the use of RD.

Original languageEnglish (US)
Pages (from-to)1266-1273
Number of pages8
JournalDental Materials
Volume33
Issue number11
DOIs
StatePublished - Nov 1 2017

Fingerprint

Rubber Dams
Rubber
Gingiva
Dams
Light emitting diodes
Curing
Swine
Light
Temperature
Tissue
Ethics Committees
Cheek
Incisor
Analysis of variance (ANOVA)
Thermocouples
Regression analysis
General Anesthesia
Logistics
Analysis of Variance
Logistic Models

Keywords

  • Dental curing lights
  • Gingiva
  • Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

Maucoski, C., Zarpellon, D. C., dos Santos, F. A., Lipinski, L. C., Campagnoli, E. B., Rueggeberg, F., & Arrais, C. A. G. (2017). Analysis of temperature increase in swine gingiva after exposure to a Polywave® LED light curing unit. Dental Materials, 33(11), 1266-1273. https://doi.org/10.1016/j.dental.2017.07.021

Analysis of temperature increase in swine gingiva after exposure to a Polywave® LED light curing unit. / Maucoski, Cristiane; Zarpellon, Driellen Christine; dos Santos, Fabio Andre; Lipinski, Leandro Cavalcante; Campagnoli, Eduardo Bauml; Rueggeberg, Frederick; Arrais, Cesar Augusto Galvão.

In: Dental Materials, Vol. 33, No. 11, 01.11.2017, p. 1266-1273.

Research output: Contribution to journalArticle

Maucoski, C, Zarpellon, DC, dos Santos, FA, Lipinski, LC, Campagnoli, EB, Rueggeberg, F & Arrais, CAG 2017, 'Analysis of temperature increase in swine gingiva after exposure to a Polywave® LED light curing unit', Dental Materials, vol. 33, no. 11, pp. 1266-1273. https://doi.org/10.1016/j.dental.2017.07.021
Maucoski, Cristiane ; Zarpellon, Driellen Christine ; dos Santos, Fabio Andre ; Lipinski, Leandro Cavalcante ; Campagnoli, Eduardo Bauml ; Rueggeberg, Frederick ; Arrais, Cesar Augusto Galvão. / Analysis of temperature increase in swine gingiva after exposure to a Polywave® LED light curing unit. In: Dental Materials. 2017 ; Vol. 33, No. 11. pp. 1266-1273.
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AU - Rueggeberg, Frederick

AU - Arrais, Cesar Augusto Galvão

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AB - Objective This study evaluated the temperature increase in swine gingival temperature after exposure to light emitted by a Polywave® LED light curing unit (LCU, Bluephase 20i, Ivoclar Vivadent). Methods After local Ethics Committee approval (protocol 711/2015), 40 pigs were subjected to general anesthesia and the LCU tip was placed 5 mm from the buccal gingival tissue (GT) close to lower lateral incisors. A thermocouple probe (Thermes WFI, Physitemp) was inserted into the gingival sulcus before and immediately after exposure to light. Real-time temperature (°C) was measured after the following exposure modes were applied: High Power (20s-H, 40s-H, and 60s-H) or Turbo mode (5s-T), either with or without the presence of rubber dam (RD) interposed between the LCU tip and GT (n = 10). The presence of gingival lesions after the exposures was also evaluated. Peak temperature (°C) and the temperature increase during exposure over that of the pre-exposure baseline value (ΔT) data were analyzed using 2-way ANOVA followed by Bonferroni's post-hoc test (α = 5%). A binary logistic regression analysis determined the risk of gingival lesion development. Results Without RD, no significant difference in ΔT was observed among 20s-H, 40s-H, and 60s-H groups, which showed the highest temperature values, while the 5s-T exposure showed the lowest ΔT, regardless of RD. RD reduced ΔT only for the 20s-H group (p = 0.004). Gingival lesions were predominantly observed using 40s-H, with RD, and 60s-H, with and without RD. Significance Exposure to a LCU light might be harmful to swine gingiva only when high radiant exposure values are delivered, regardless of the use of RD.

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