Power density of light curing units through resin inlays fabricated with direct and indirect composites

Hoon-Sang Chang; Young-Jun Lim; Jeong-Mi Kim; Sung-Ok Hong

doi:10.5395/JKACD.2010.35.5.353

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Basic Research Power density of light curing units through resin inlays fabricated with direct and indirect composites: Hoon-Sang Chang, DDS, PhD¹, Young-Jun Lim, DDS¹, Jeong-Mi Kim, MS², Sung-Ok Hong, DDS, MS¹; 2010;35(5):-358.
DOI: https://doi.org/10.5395/JKACD.2010.35.5.353
Published online: September 30, 2010

¹Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute, Iksan, Korea.

²Dental Laboratory, Wonkwang University Dental Hospital, Iksan, Korea.

Correspondence to Hoon-Sang Chang, DDS, PhD. Assistant Professor, Department of Conservative Dentistry, Wonkwang University College of Dentistry and Dental Research Institute, 344-2 Shinyong-dong, Iksan, Korea 570-210. Tel, +82-63-859-2931; Fax, +82-63-859-2932; husch03@wonkwang.ac.kr

• Received: July 22, 2010 • Revised: August 9, 2010 • Accepted: August 10, 2010

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Abstract
REFERENCES

Abstract

Objectives
The purpose of this study was to measure the power density of light curing units transmitted through resin inlays fabricated with direct composite (Filtek Z350, Filtek Supreme XT) and indirect composite (Sinfony).
Materials and Methods
A3 shade of Z350, A3B and A3E shades of Supreme XT, and A3, E3, and T1 shades of Sinfony were used to fabricate the resin inlays in 1.5 mm thickness. The power density of a halogen light curing unit (Optilux 360) and an LED light curing unit (Elipar S10) through the fabricated resin inlays was measured with a hand held dental radiometer (Cure Rite). To investigate the effect of each composite layer consisting the resin inlays on light transmission, resin specimens of each shade were fabricated in 0.5 mm thickness and power density was measured through the resin specimens.
Results
The power density through the resin inlays was lowest with the Z350 A3, followed by Supreme XT A3B and A3E. The power density was highest with Sinfony A3, E3, and T1 (p < 0.05). The power density through 0.5 mm thick resin specimens was lowest with dentin shades, Sinfony A3, Z350 A3, Supreme XT A3B, followed by enamel shades, Supreme XT A3E and Sinfony E3. The power density was highest with translucent shade, Sinfony T1 (p < 0.05).
Conclusions
Using indirect lab composites with dentin, enamel, and translucent shades rather than direct composites with one or two shades could be advantageous in transmitting curing lights through resin inlays.
Keywords: Halogen light curing unit; Hand held dental radiometer; LED light curing unit; Power density; Resin inlay; Sinfony

Table 1

Composition of the resin composites used in this study

The composition of the organic matrix, filler, and filler contents was provided by the manufacturers.

Bis-GMA, Bisphenol A diglycidyl ether dimethacrylate; UDMA, urethane dimethacrylate; Bis-EMA, Bisphenol A polyethylene glycol diether dimethacrylate; TEGDMA, triethylene glycol dimethacrylate.

Table 2

Power density (mW/cm² ± SD) of light curing units through resin specimens of 1.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

Table 3

Power density (mW/cm² ± SD) of light curing units through resin specimens of 0.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

REFERENCES

1. Kramer N, Lohbauer U, Frankenberger R. Adhesive luting of indirect restorations. Am J Dent. 2000;13(Spec No):60D-76D.PubMed
2. McLean JW. The science and art of dental ceramics. Oper Dent. 1991;16: 149-156.PubMed
3. Touati B, Aidan N. Second generation laboratory composite resins for indirect restorations. J Esthet Dent. 1997;9: 108-118.Article PubMed
4. Cesar PF, Miranda WG Jr, Braga RR. Influence of shade and storage time on the flexural strength, flexural modulus, and hardness of composites used for indirect restorations. J Prosthet Dent. 2001;86: 289-296.PubMed
5. Soares CJ, Pizi EC, Fonseca RB, Martins LR. Mechanical properties of light-cured composites polymerized with several additional post-curing methods. Oper Dent. 2005;30: 389-394.PubMed
6. Borba M, Della Bona A, Cecchetti D. Flexural strength and hardness of direct and indirect composites. Braz Oral Res. 2009;23: 5-10.Article PubMed
7. el-Mowafy O. The use of resin cements in restorative dentistry to overcome retention problems. J Can Dent Assoc. 2001;67: 97-102.PubMed
8. Sorensen JA, Kang SK, Avera SP. Porcelain-composite interface microleakage with various porcelain surface treatments. Dent Mater. 1991;7: 118-123.PubMed
9. Jensen ME, Sheth JJ, Tolliver D. Etched-porcelain resin-bonded full-veneer crowns:in vitro fracture resistance. Compendium. 1989;10: 336-338. 40-41. 44-47.PubMed
10. el-Badrawy WA, el-Mowafy OM. Chemical versus dual curing of resin inlay cements. J Prosthet Dent. 1995;73: 515-524.Article PubMed
11. Hasegawa EA, Boyer DB, Chan DC. Hardening of dual-cured cements under composite resin inlays. J Prosthet Dent. 1991;66: 187-192.Article PubMed
12. Rueggeberg FA, Jordan DM. Effect of light-tip distance on polymerization of resin composite. Int J Prosthodont. 1993;6: 364-370.PubMed
13. Prati C, Chersoni S, Montebugnoli L, Montanari G. Effect of air, dentin and resin-based composite thickness on light intensity reduction. Am J Dent. 1999;12: 231-234.PubMed
14. Fan PL, Schumacher RM, Azzolin K, Geary R, Eichmiller FC. Curing-light intensity and depth of cure of resin-based composites tested according to international standards. J Am Dent Assoc. 2002;133: 429-434.Article PubMed
15. Na JS, Jeong SW, Hwang YC, Kim SH, Yun C, Oh WM, et al. Effect of light source and shade on depth of cure of composites. J Korean Acad Conserv Dent. 2002;27: 561-568.Article
16. Park JJ, Park JW, Park SH, Park JM, Kwon TK, Kim SK. The effect of irradiation modes on polymerization and microleakage of composite resin. J Korean Acad Conserv Dent. 2002;27: 158-174.
17. Shin HJ, Kim JW, Cho KM. Polymerization ability of several light curing sources on composite resin. J Korean Acad Conserv Dent. 2003;28: 156-161.Article
18. McCabe JF, Carrick TE. Output from visible-light activation units and depth of cure of light-activated composites. J Dent Res. 1989;68: 1534-1539.Article PubMed PDF
19. Shortall AC. How light source and product shade influence cure depth for a contemporary composite. J Oral Rehabil. 2005;32: 906-911.Article PubMed
20. Campbell PM, Johnston WM, O'Brien WJ. Light scattering and gloss of an experimental quartz-filled composite. J Dent Res. 1986;65: 892-894.PubMed
21. Ruyter IE, Oysaed H. Conversion in different depths of ultraviolet and visible light activated composite materials. Acta Odontol Scand. 1982;40: 179-192.Article PubMed
22. dos Santos GB, Alto RV, Filho HR, da Silva EM, Fellows CE. Light transmission on dental resin composites. Dent Mater. 2008;24: 571-576.Article PubMed

Tables & Figures

Table 1

Composition of the resin composites used in this study

The composition of the organic matrix, filler, and filler contents was provided by the manufacturers.

Bis-GMA, Bisphenol A diglycidyl ether dimethacrylate; UDMA, urethane dimethacrylate; Bis-EMA, Bisphenol A polyethylene glycol diether dimethacrylate; TEGDMA, triethylene glycol dimethacrylate.

Table 2

Power density (mW/cm² ± SD) of light curing units through resin specimens of 1.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

Table 3

Power density (mW/cm² ± SD) of light curing units through resin specimens of 0.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

REFERENCES

1. Kramer N, Lohbauer U, Frankenberger R. Adhesive luting of indirect restorations. Am J Dent. 2000;13(Spec No):60D-76D.PubMed
2. McLean JW. The science and art of dental ceramics. Oper Dent. 1991;16: 149-156.PubMed
3. Touati B, Aidan N. Second generation laboratory composite resins for indirect restorations. J Esthet Dent. 1997;9: 108-118.Article PubMed
4. Cesar PF, Miranda WG Jr, Braga RR. Influence of shade and storage time on the flexural strength, flexural modulus, and hardness of composites used for indirect restorations. J Prosthet Dent. 2001;86: 289-296.PubMed
5. Soares CJ, Pizi EC, Fonseca RB, Martins LR. Mechanical properties of light-cured composites polymerized with several additional post-curing methods. Oper Dent. 2005;30: 389-394.PubMed
6. Borba M, Della Bona A, Cecchetti D. Flexural strength and hardness of direct and indirect composites. Braz Oral Res. 2009;23: 5-10.Article PubMed
7. el-Mowafy O. The use of resin cements in restorative dentistry to overcome retention problems. J Can Dent Assoc. 2001;67: 97-102.PubMed
8. Sorensen JA, Kang SK, Avera SP. Porcelain-composite interface microleakage with various porcelain surface treatments. Dent Mater. 1991;7: 118-123.PubMed
9. Jensen ME, Sheth JJ, Tolliver D. Etched-porcelain resin-bonded full-veneer crowns:in vitro fracture resistance. Compendium. 1989;10: 336-338. 40-41. 44-47.PubMed
10. el-Badrawy WA, el-Mowafy OM. Chemical versus dual curing of resin inlay cements. J Prosthet Dent. 1995;73: 515-524.Article PubMed
11. Hasegawa EA, Boyer DB, Chan DC. Hardening of dual-cured cements under composite resin inlays. J Prosthet Dent. 1991;66: 187-192.Article PubMed
12. Rueggeberg FA, Jordan DM. Effect of light-tip distance on polymerization of resin composite. Int J Prosthodont. 1993;6: 364-370.PubMed
13. Prati C, Chersoni S, Montebugnoli L, Montanari G. Effect of air, dentin and resin-based composite thickness on light intensity reduction. Am J Dent. 1999;12: 231-234.PubMed
14. Fan PL, Schumacher RM, Azzolin K, Geary R, Eichmiller FC. Curing-light intensity and depth of cure of resin-based composites tested according to international standards. J Am Dent Assoc. 2002;133: 429-434.Article PubMed
15. Na JS, Jeong SW, Hwang YC, Kim SH, Yun C, Oh WM, et al. Effect of light source and shade on depth of cure of composites. J Korean Acad Conserv Dent. 2002;27: 561-568.Article
16. Park JJ, Park JW, Park SH, Park JM, Kwon TK, Kim SK. The effect of irradiation modes on polymerization and microleakage of composite resin. J Korean Acad Conserv Dent. 2002;27: 158-174.
17. Shin HJ, Kim JW, Cho KM. Polymerization ability of several light curing sources on composite resin. J Korean Acad Conserv Dent. 2003;28: 156-161.Article
18. McCabe JF, Carrick TE. Output from visible-light activation units and depth of cure of light-activated composites. J Dent Res. 1989;68: 1534-1539.Article PubMed PDF
19. Shortall AC. How light source and product shade influence cure depth for a contemporary composite. J Oral Rehabil. 2005;32: 906-911.Article PubMed
20. Campbell PM, Johnston WM, O'Brien WJ. Light scattering and gloss of an experimental quartz-filled composite. J Dent Res. 1986;65: 892-894.PubMed
21. Ruyter IE, Oysaed H. Conversion in different depths of ultraviolet and visible light activated composite materials. Acta Odontol Scand. 1982;40: 179-192.Article PubMed
22. dos Santos GB, Alto RV, Filho HR, da Silva EM, Fellows CE. Light transmission on dental resin composites. Dent Mater. 2008;24: 571-576.Article PubMed

Citations

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Power density of light curing units through resin inlays fabricated with direct and indirect composites

J Korean Acad Conserv Dent. 2010;35(5):353-358. Published online September 30, 2010

DOI: https://doi.org/10.5395/JKACD.2010.35.5.353

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Power density of light curing units through resin inlays fabricated with direct and indirect composites

Table 1

Composition of the resin composites used in this study

The composition of the organic matrix, filler, and filler contents was provided by the manufacturers.

Bis-GMA, Bisphenol A diglycidyl ether dimethacrylate; UDMA, urethane dimethacrylate; Bis-EMA, Bisphenol A polyethylene glycol diether dimethacrylate; TEGDMA, triethylene glycol dimethacrylate.

Table 2

Power density (mW/cm² ± SD) of light curing units through resin specimens of 1.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

Table 3

Power density (mW/cm² ± SD) of light curing units through resin specimens of 0.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

Table 1 Composition of the resin composites used in this study

The composition of the organic matrix, filler, and filler contents was provided by the manufacturers.

Bis-GMA, Bisphenol A diglycidyl ether dimethacrylate; UDMA, urethane dimethacrylate; Bis-EMA, Bisphenol A polyethylene glycol diether dimethacrylate; TEGDMA, triethylene glycol dimethacrylate.

Table 2 Power density (mW/cm2 ± SD) of light curing units through resin specimens of 1.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.

Table 3 Power density (mW/cm2 ± SD) of light curing units through resin specimens of 0.5 mm thickness

^*The superscripts with the same letters are not significantly different at α= 0.05.