Effect of calcium hydroxide on bond strength of dentin bonding systems

No-Hoon Park; Sang-Hyuk Park; Gi-Woon Choi; Sang-Jin Park

doi:10.5395/JKACD.2007.32.3.198

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Original Article Effect of calcium hydroxide on bond strength of dentin bonding systems: No-Hoon Park, Sang-Hyuk Park, Gi-Woon Choi, Sang-Jin Park; Journal of Korean Academy of Conservative Dentistry 2007;32(3):198-207.
DOI: https://doi.org/10.5395/JKACD.2007.32.3.198
Published online: May 31, 2007

Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University, Korea.

Corresponding Author: Sang-Jin Park. Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University, 1, Hoegi Dong, Dongdaemun Gu, Seoul, Korea, 130-702. Tel: 82-2-958-9335, psangjin@khu.ac.kr

• Received: March 21, 2007 • Revised: April 4, 2007 • Accepted: April 10, 2007

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Abstract
REFERENCES

Abstract

The purpose of this study was to investigate the effect of calcium hydroxide on dentin bonding strength of various dentin bonding systems as a function of time in composite resin restoration.

Dentin adhesives used in this study were Scotchbond Multipurpose, Single Bond, SE Bond and Prompt L-Pop. Flat dentin surfaces adjacent to pulp chamber were created, then Ca(OH)₂ and saline were mixed and applied on dentin surface of experimental group, then IRM was used to cover the mixture on dentin surface and the specimens were stored at 36.5℃ for experiment period (7 days, 30 days). After removing IRM and Ca(OH)₂, each dentin adhesives were treated on dentin surfaces.

Composite resin (Z-250, 3M) was placed with 5 mm height and was light-cured for 20 seconds. After stored in distilled water for 24 hours, each dentin-composite bonded spicemen was embedded in epoxy resin and sectioned into 1.0 × 1.0 mm² cross section composite-dentin beams. Specimen was mounted on zig of Universal testing machine and µTBS test was performed. SEM analysis was performed to examine the fractured surfaces.

The results suggested that applying calcium hydroxide did not show significant difference in dentin bonding strength.
Keywords: Calcium hydroxide; Dentin bonding systems; Composite resin restoration; Dentin bonding strength; µTBS test; SEM analysis

REFERENCES

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Figure 2

Micro-tensile bond strength of 12 experimental groups.

Figure 3

Micro-tensile bond strength in group of SM.

Figure 4

Micro-tensile bond strength in group of SB.

Figure 5

Micro-tensile bond strength in group of SE.

Figure 6

Micro-tensile bond strength in group of PL.

Figure 7

SEM photograph of the fractured surface of SM/C group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and there are resin tags in the dentinal tubules that fractured at the bottom of the hybrid layer.

Figure 8

SEM photograph of the fractured surface of SM/30 group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and there are resin tags in the dentinal tubules that fractured at the bottom of the hybrid layer.

Figure 9

SEM photograph of the fractured surface of SB/C group, showing mixed failure. The failure occurred both at the top of the hybrid layer and in the bottom of the hybrid layer.

Figure 10

SEM photograph of the fractured surface of SB/30 group, showing mixed failure. The failure occurred both at the top of the hybrid layer and in the bottom of the hybrid layer.

Figure 11

SEM photograph of the fractured surface of SE/C group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and exposed dentin, which was not enveloped by resin.

Figure 12

SEM photograph of the fractured surface of SE/30 group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and exposed dentin, which was not enveloped by resin.

Figure 13

SEM photograph of the fractured surface of PL/C group, showing adhesive failure. The failure occurred between the resin and the top of the hybrid layer.

Figure 14

SEM photograph of the fractured surface of PL/30 group, showing adhesive failure. The failure occurred between the resin and the top of the hybrid layer.

Table 1

Dentine adhesives and composite resin used in this study

Table 2

Modes of bonding procedure of four adhesives

Table 3

Experimental groups and code by adhesives used in this study

Table 4

Micro-tensile bond strength of 12 experimental groups (MPa ± SD)

^*Same superscript means no statistical difference.

Tables & Figures

REFERENCES

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Effect of calcium hydroxide on bond strength of dentin bonding systems

J Korean Acad Conserv Dent. 2007;32(3):198-207. Published online May 31, 2007

DOI: https://doi.org/10.5395/JKACD.2007.32.3.198

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Effect of calcium hydroxide on bond strength of dentin bonding systems

Figure 2 Micro-tensile bond strength of 12 experimental groups.

Figure 3 Micro-tensile bond strength in group of SM.

Figure 4 Micro-tensile bond strength in group of SB.

Figure 5 Micro-tensile bond strength in group of SE.

Figure 6 Micro-tensile bond strength in group of PL.

Figure 7 SEM photograph of the fractured surface of SM/C group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and there are resin tags in the dentinal tubules that fractured at the bottom of the hybrid layer.

Figure 8 SEM photograph of the fractured surface of SM/30 group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and there are resin tags in the dentinal tubules that fractured at the bottom of the hybrid layer.

Figure 9 SEM photograph of the fractured surface of SB/C group, showing mixed failure. The failure occurred both at the top of the hybrid layer and in the bottom of the hybrid layer.

Figure 10 SEM photograph of the fractured surface of SB/30 group, showing mixed failure. The failure occurred both at the top of the hybrid layer and in the bottom of the hybrid layer.

Figure 11 SEM photograph of the fractured surface of SE/C group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and exposed dentin, which was not enveloped by resin.

Figure 12 SEM photograph of the fractured surface of SE/30 group, showing cohesive failure. The failure occurred at the bottom of the hybrid layer and exposed dentin, which was not enveloped by resin.

Figure 13 SEM photograph of the fractured surface of PL/C group, showing adhesive failure. The failure occurred between the resin and the top of the hybrid layer.

Figure 14 SEM photograph of the fractured surface of PL/30 group, showing adhesive failure. The failure occurred between the resin and the top of the hybrid layer.

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Figure 14

Effect of calcium hydroxide on bond strength of dentin bonding systems

Table 1

Dentine adhesives and composite resin used in this study

Table 2

Modes of bonding procedure of four adhesives

Table 3

Experimental groups and code by adhesives used in this study

Table 4

Micro-tensile bond strength of 12 experimental groups (MPa ± SD)

^*Same superscript means no statistical difference.

Table 1 Dentine adhesives and composite resin used in this study

Table 2 Modes of bonding procedure of four adhesives

Table 3 Experimental groups and code by adhesives used in this study

Table 4 Micro-tensile bond strength of 12 experimental groups (MPa ± SD)

^*Same superscript means no statistical difference.