Application of 10% Ascorbic Acid Improves Resin Shear Bond Stregth in Bleached Dentin
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Faculty of Dentistry, Universitas Indonesia
2014-10-01
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| Series: | Journal of Dentistry Indonesia |
| Subjects: | |
| Online Access: | http://jdentistry.ui.ac.id/index.php/JDI/article/view/206 |
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line-height: 150%;"><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; mso-ansi-language: IN;">Restoration of the teeth immediately after bleaching with H<sub>2</sub>O<sub>2</sub> 35% is contraindicated due to</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;"> </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">the remnants of </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">free radical </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">that </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">will stay inside </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">dentin</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;"> </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">for 2-3 </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">weeks</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;"> which will compromise the adhesiveness of composite resin. <strong style="mso-bidi-font-weight: normal;">Objective: </strong>The aim of this study was to evaluate the influence of 10% ascorbic acid on shear bond strength of composite placed on bleached dentin.<span style="mso-spacerun: yes;"> </span><strong style="mso-bidi-font-weight: normal;">Methods:</strong></span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;">Twenty seven samples were divided equally into three groups. </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">G</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">roup 1: dentin was etched with 35% phosphoric acid;</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;"> </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">Group 2: dentin was bleached with 35% H<sub>2</sub>O<sub>2 </sub>follow</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">ed by</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;" lang="EN-US"> </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">etching with 35% phosphoric acid; Group 3: dentin was bleached with 35% H<sub>2</sub>O<sub>2</sub>, follow</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">ed by</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;"> application of 10% ascorbic acid and etched with 35% phosphoric acid. All s</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;">amples </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-fareast-language: IN;" lang="EN-US">were then stored at </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">37<sup>0</sup>C</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;"> </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-fareast-language: IN;" lang="EN-US">for 24 hours</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;">. </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-fareast-language: IN;" lang="EN-US">The </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">Universal Testing Machine</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-fareast-language: IN;" lang="EN-US"> was used to measure </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;">shear bond strength </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-fareast-language: IN;" lang="EN-US">and the results were analyzed </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN; mso-fareast-language: IN;">with </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">Kruskal Wallis and Mann Whitney test. <strong style="mso-bidi-font-weight: normal;">Results: </strong>After nine independent experiments, 10% ascorbic acid application on bleached dentin resulted in highest increased in bond stregth </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; mso-ansi-language: IN;">(56.04</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial;" lang="EN-US">±11.06MPa) </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">compared to Group 2 </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial;" lang="EN-US">(29.09±7.63MPa) </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">and Group 1 </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial;" lang="EN-US">(25.55±2.22MPa) </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;">and the difference was statistically significant (<em style="mso-bidi-font-style: normal;">p</em><0.05). <strong style="mso-bidi-font-weight: normal;">Conclusion: </strong>Application of 10% ascorbic acid to the bleached dentin improve</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">d</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;"> the shear bond strength </span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black;" lang="EN-US">of</span><span style="mso-bidi-font-size: 11.0pt; line-height: 150%; mso-bidi-font-family: Arial; color: black; mso-ansi-language: IN;"> resin composite.</span></p> |
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| ISSN: | 1693-9697 2355-4800 |