Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives

So-Rae Seong; Duck-kyu Seo; In-Bog Lee; Ho-Hyun Son; Byeong-Hoon Cho

doi:10.5395/JKACD.2010.35.2.125

Articles

Page Path: HOME > Restor Dent Endod > Volume 35(2); 2010 > Article

Basic Research Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives: So-Rae Seong, Duck-kyu Seo, In-Bog Lee, Ho-Hyun Son, Byeong-Hoon Cho; Journal of Korean Academy of Conservative Dentistry 2010;35(2):125-133.
DOI: https://doi.org/10.5395/JKACD.2010.35.2.125
Published online: March 31, 2010

Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.

Corresponding Author: Byeong-Hoon Cho. Department of Conservative Dentistry, School of Dentistry, Seoul National University, 275-1 Yeongeon-Dong, Jongno-Gu, Seoul, 110-768, Korea. Tel: 82-2-2072-3514, Fax: 82-2-2072-3859, chobh@snu.ac.kr

• Received: March 2, 2010 • Revised: March 11, 2010 • Accepted: March 12, 2010

17 Views
0 Download

prev next

Full Article

Download PDF

Abstract
REFERENCES

Abstract

Objectives
Rapid polymerization of overlying composite resin causes high polymerization shrinkage stress at the adhesive layer. In order to alleviate the shrinkage stress, increasing the light intensity over the first 5 seconds was suggested as an exponential curing mode by an LED light curing unit (Elipar FreeLight2, 3M ESPE). In this study, the effectiveness of the exponential curing mode on reducing stress was evaluated with measuring microtensile bond strength of three adhesives after the overlying composite resin was polymerized with either continuous or exponential curing mode.
Methods
Scotchbond Multipurpose Plus (MP, 3M ESPE), Single Bond 2 (SB, 3M ESPE), and Adper Prompt (AP, 3M ESPE) were applied onto the flat occlusal dentin of extracted human molar. The overlying hybrid composite (Denfil, Vericom, Korea) was cured under one of two exposing modes of the curing unit. At 48h from bonding, microtensile bond strength was measured at a crosshead speed of 1.0 mm/min. The fractured surfaces were observed under FE-SEM.
Results
There was no statistically significant difference in the microtensile bond strengths of each adhesive between curing methods (Two-way ANOVA, p > 0.05). The microtensile bond strengths of MP and SB were significantly higher than that of AP (p < 0.05). Mixed failures were observed in most of the fractured surfaces, and differences in the failure mode were not observed among groups.
Conclusion
The exponential curing method had no beneficial effect on the microtensile dentin bond strengths of three adhesives compared to continuous curing method.
Keywords: Polymerization shrinkage; Exponential curing; Dentin adhesive; Microtensile bond strength; Failure mode

REFERENCES

1. Feilzer AJ, de Gee AJ, Davidson CL. Curing contraction of composites and glass-ionomer cements. J Prosthet Dent. 1988;59: 297-300.Article PubMed
2. Davidson CL, Feilzer AJ. Polymerization shrinkage and polymerization shrinkage stress in polymer-based restoratives. J Dent. 1997;25(6):435-440.Article PubMed
3. Davidson CL, De Gee AJ, Feilzer A. The competition between the composite-dentin bond strength and the polymerization contraction stress. J Dent Res. 1984;63(12):1396-1399.Article PubMed PDF
4. Feilzer AJ, de Gee AJ, Davidson CL. Setting stress in composite resin in relation to configuration of the restoration. J Dent Res. 1987;66(11):1636-1639.Article PubMed PDF
5. Kemp-Scholte CM, Davidson CL. Marginal integrity related to bond strength and strain capacity of composite resin restorative systems. J Prosthet Dent. 1990;64: 658-664.Article PubMed
6. Chye CH, Yap AUJ, Laim YC, Soh MS. Post-gel polymerization shrinkage associated with different light curing regimens. Oper Dent. 2005;30(4):474-480.PubMed
7. Davidson CL. Resisting the curing contraction with adhesive composites. J Prosthet Dent. 1986;55(4):446-447.PubMed
8. Mehl A, Hickel R, Kunzelmann KH. Physical properties and gap formation of light-cured composites with and without 'softstart-polymerization'. J Dent. 1997;25(3-4):321-330.Article PubMed
9. Uno S, Asmussen E. marginal adaptation of a restorative resin polymerized at reduced rate. Scand J Dent Res. 1991;99: 440-444.Article PubMed
10. Sakaguchi RL, Berge HX. Reduced light energy density decreases post-gel contraction while maintaining degree of conversion in composites. J Dent. 1998;26(8):695-700.Article PubMed
11. Unterbrink GL, Muessner R. Influence of light intensity on two restorative systems. J Dent. 1995;23(3):183-189.Article PubMed
12. Oberholpez G, Botha CT, Preez IC. Advances in light curing units and curing techniques : a literature review. SADJ. 2005;60(10):451-454.PubMed
13. Suh BI. Controlling and understanding the polymerization shrinkage-induced stresses in light-cured composites. Compend Contin Educ Dent Suppl. 1999;(25):S34-S41.PubMed
14. Price RBT, Ehrnford L, Andreou P, Felix CA. Comparison of quartz-tungsten-halogen, light-emitting diode, and plasma arc curing lights. J Adhes Dent. 2003;5: 193-207.PubMed
15. Miyazaki M, Oshida Y, Moore BK, Onose H. Effect of light exposure on fracture toughness and flexural strength of light-cured composites. Dent Mater. 1996;12(6):328-332.Article PubMed
16. Lim MY, Cho KM, Hong CU. Polymerization shrinkage of composite resins cured by variable light intensities. J Korean Acad Conserv Dent. 2007;32(1):28-36.Article
17. Burgess JO, Walker RS, Porche CJ, rappold AJ. Light curing-an update. Compend Contin Educ Dent. 2002;23(10):889-906.PubMed
18. Goracci G, Casa de Martinis L, Mori G. Curing light-intensity and marginal leakage of resin composite restoration. Quintessence Int. 1996;27: 355-362.
19. Bouschlicher MR, Rueggeberg FA. Effect of ramped light intensity on polymerization force and conversion in a photoactivated composite. J Esthet Dent. 2000;12: 328-339.PubMed
20. Deliperi S, Bardwell DN. An alternative method to reduce polymerization shrinkage in direct posterior composite restorations. J Am Dent Assoc. 2002;133: 1387-1398.Article PubMed
21. Yap AUJ, Soh MS. Curing efficacy of a new generation high-power LED lamp. Oper Dent. 2005;30(6):758-763.PubMed
22. Hofmann N, Hunecke A. Influence of curing methods and matrix type on the marginal seal of class II resin-based composite restorations in vitro. Oper Dent. 2006;31(1):97-105.Article PubMed PDF
23. Koran P, Kurschner R. Effect of sequential versus continuous irradiation of a light-cured resin composite on shrinkage, viscosity, adhesion, and degree of polymerization. Am J Dent. 1998;11(1):17-22.PubMed
24. Silikas N, Eliades G, Watts DC. Light intensity effects on resin-composite degree of conversion and shrinkage strain. Dent mater. 2000;16(4):292-296.Article PubMed
25. Friedl KH, Schmalz G, Hiller KA, Markl A. Marginal adaptation of Clss V restorations with and without softstart-polymerization. Oper Dent. 2000;25(1):26-32.PubMed
26. Yap AU, Seneviratne C. Influence of light energy density on effectiveness of composite cure. Oper Dent. 2001;26: 460-466.PubMed
27. Van Meerbeek B, Willems G, Celis JP, Roos JR, Braem M, Lambrechts P, Vanherle G. Assessment by nano-indentation of the hardness and elasticity of the resin-dentin bonding area. J Dent Res. 1993;72: 1434-1442.Article PubMed PDF
28. Venz S, Dickens B. Modified surface-active monomers for adhesive bonding to dentin. J Dent Res. 1993;72: 582-586.Article PubMed PDF
29. Perdigao J, Ramos J, Lambrechts P. In vitro interfacial relationship between human dentin and one-bottle dental adhesives. Dent Mater. 1997;13: 218-227.Article PubMed
30. Choi KK, Condon JR, Ferracane JL. The effects of adhesive thickness on polymerization contraction stress of composite. J Dent Res. 2000;79: 812-817.Article PubMed PDF
31. Zheng L, Pereira PNR, Nakajima M, Sano H, Tagami J. Relationship between adhesive thickness and microtensile bond strength. Oper Dent. 2001;26: 97-104.PubMed
32. Cho BH, Dickens SH. Effects of the acetone content of single solution dentin bonding agents on the adhesive layer thickness and the microtensile bond strength. Dent Mater. 2004;20: 107-115.Article PubMed
33. Dickens SH, Cho BH. Interpretation of bond failure through convesion and residual solvent measurements and Weibull analyses of flexural and microtensile bond strengths of bonding agents. Dent Mater. 2005;21: 354-364.PubMed
34. Scherrer SS, Denry I, Wiskott A, Belser U. Effect of water exposure on the fracture toughness and flexural strength of a dental glass. Dent Mater. 2001;17: 367-371.PubMed
35. Price RB, Bannerman RA, Rizkalla AS, Hall GC. Effect of stepped vs. continuous light curing exposure on bond strengths to dentin. Am J Dent. 2000;13: 123-128.PubMed
36. Caldwell R, Kulkarni G, Titley K. Does single versus stepped curing of composite resins affect their shear bond strength? J Can Dent Assoc. 2001;67(10):588-592.PubMed
37. Dauvillier BS, Aarnts MP, Feilzer AJ. Developments in shrinkage control of adhesive restoratives. J Esthet Dent. 2000;12(6):291-299.Article PubMed
38. Dennison JB, Yaman P, Seir R, Hamilton JC. Effect of variable light intensity on composite shrinkage. J Prosthet Dent. 2000;84(5):499-505.Article PubMed
39. Park JG, Cho BH, Lee IB, Kwon HC, Um CM. The effects of various light intensity on the polymerization of resin composites. J Korean Acad Conserv Dent. 2001;26(1):86-94.
40. Yun YH, Park SH. The effect of intermittent composite curing on marginal adaptation. J Korean Acad Conserv Dent. 2007;32(3):248-259.Article

Figure 1

SEM micrograph of the bonded interfaces treated with 6 N HCl and 3.5% NaOCl of MP group. No cracks were observed at the junction of the adhesive layer and the hybrid layer or between adhesive layer and composite resin in both continuous curing group (a) and exponential curing group (b).

Figure 2

The failure mode distribution of tested specimens.

C: continuous curing group, E: exponential curing group

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt.

Figure 3

SEM micrograph of the dentin surface of a debonded specimen in SB-continuous curing group. (a) Low magnification view (× 100). Adhesive failure and brittle failure pattern was observed. (b) High magnification view (× 1000). The dentinal tubules and fractured resin tags indicate failure at the interface between the adhesive layer and dentin.

Figure 4

SEM micrograph of the dentin surface of a debonded specimen in SB-continuous curing group. (a) Low magnification view (× 100). Mixed failure mode was observed through the adhesive layer (A), composite resin (R) and hybid layer (H). (b) High magnification view at the area H (× 1000). The dentinal tubules were covered partially by remnants of adhesive.

Table 1

The composition of the materials used in this study

Table 2

The mean microtensile bond strengths (MPa) of tested specimens (Mean ± SD; N, numbers of specimens)

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt

^*The same superscripts denote no statistical difference between groups (Tukey test; p > 0.05, uppercase letters = columns; lowercase letters =rows).

Table 3

The failure modes of tested specimens

One specimen in MP - continuous curing group was lost before failure mode analysis.

A: adhesive failure, M: mixed failure, C_d: cohesive failure in dentin, C_r: cohesive failure in resin

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt

Tables & Figures

REFERENCES

Citations

Citations to this article as recorded by

ePub Link

Cite

CITE: export Copy Download Format; Close

Download Citation

Download a citation file in RIS format that can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Reference Manager.

Format:

RIS — For EndNote, ProCite, RefWorks, and most other reference management software
BibTeX — For JabRef, BibDesk, and other BibTeX-specific software

Include:

Citation for the content below
Citation and abstract for the content below

Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives

J Korean Acad Conserv Dent. 2010;35(2):125-133. Published online March 31, 2010

DOI: https://doi.org/10.5395/JKACD.2010.35.2.125

XML Download

Figure

Related articles

Effect of an aluminum chloride hemostatic agent on the dentin shear bond strength of a universal adhesive

Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives

Figure 1 SEM micrograph of the bonded interfaces treated with 6 N HCl and 3.5% NaOCl of MP group. No cracks were observed at the junction of the adhesive layer and the hybrid layer or between adhesive layer and composite resin in both continuous curing group (a) and exponential curing group (b).

Figure 2 The failure mode distribution of tested specimens. C: continuous curing group, E: exponential curing group MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt.

Figure 3 SEM micrograph of the dentin surface of a debonded specimen in SB-continuous curing group. (a) Low magnification view (× 100). Adhesive failure and brittle failure pattern was observed. (b) High magnification view (× 1000). The dentinal tubules and fractured resin tags indicate failure at the interface between the adhesive layer and dentin.

Figure 4 SEM micrograph of the dentin surface of a debonded specimen in SB-continuous curing group. (a) Low magnification view (× 100). Mixed failure mode was observed through the adhesive layer (A), composite resin (R) and hybid layer (H). (b) High magnification view at the area H (× 1000). The dentinal tubules were covered partially by remnants of adhesive.

Figure 1

Figure 2

Figure 3

Figure 4

Effect of the exponential curing of composite resin on the microtensile dentin bond strength of adhesives

Table 1

The composition of the materials used in this study

Table 2

The mean microtensile bond strengths (MPa) of tested specimens (Mean ± SD; N, numbers of specimens)

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt

^*The same superscripts denote no statistical difference between groups (Tukey test; p > 0.05, uppercase letters = columns; lowercase letters =rows).

Table 3

The failure modes of tested specimens

One specimen in MP - continuous curing group was lost before failure mode analysis.

A: adhesive failure, M: mixed failure, C_d: cohesive failure in dentin, C_r: cohesive failure in resin

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt

Table 1 The composition of the materials used in this study

Table 2 The mean microtensile bond strengths (MPa) of tested specimens (Mean ± SD; N, numbers of specimens)

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt

^*The same superscripts denote no statistical difference between groups (Tukey test; p > 0.05, uppercase letters = columns; lowercase letters =rows).

Table 3 The failure modes of tested specimens

One specimen in MP - continuous curing group was lost before failure mode analysis.

A: adhesive failure, M: mixed failure, C_d: cohesive failure in dentin, C_r: cohesive failure in resin

MP, Scotchbond Multipurpose Plus; AB, All Bond 2; AP, Adper Prompt