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The influence of cross-sectional shape and surface area on the microtensile bond test.

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Title: The influence of cross-sectional shape and surface area on the microtensile bond test.
Authors: Phrukkanon, Suwachai1 S.Prukkanon@dent.unimelb.edu.au, Burrow, Michael F.1, Tyas, Martin J.1
Source: Dental Materials. Jun1998, Vol. 14 Issue 3, p212-221. 10p. 1 Black and White Photograph, 5 Diagrams, 6 Charts.
Subjects: Dentin, Dental pulp, Dental enamel, Dental materials, Dental adhesives, Scanning electron microscopy
Abstract: Objectives. The purpose of this study was to determine the effect of the cross-sectional area shape (cylindrical vs. rectangular) and the bonding surface area on the microtensile bond strengths and stress distribution of four dentin adhesive systems (Scotchbond MP plus, OptiBond FL, OptiBond Solo, One-Step). In addition, finite element analysis (FEA) models were developed to investigate stress distributions. Methods. Extracted human molars were cut vertically and the occlusal enamel removed; one-half of the tooth was used for rectangular specimens, the other half for cylindrical specimens. The occlusal dentin was bonded according to the manufacturers' directions and covered with a block of resin composite. For the cylindrical specimens, the bonded dentin was shaped with a diamond bur on a lathe to produce specimens of area 1.1, 1.5 or 3.1 mm² at the bonded interface. The rectangular specimens were sectioned to obtain bar-shaped specimens which, were shaped to produce hour-glass shaped specimens with the same area as the round specimens. Bonds were stressed in tension at a speed of 1 mm min-1. The mean bond strengths were compared using two-way ANOVA, one-way ANOVA, LSD and Student's t tests. The fractured surfaces were examined by scanning electron microscopy, and the frequencies of the fracture modes were compared using the Kruskal-Wallis and Mann-Whitney U tests. FEA models were created simulating the cross-sectional areas for bonding to determine the stress distribution. Results. The 3.1 mm² bonding area groups showed significantly lower bond strengths than the 1.1 mm² bonding area groups (p < 0.05), except for the rectangular specimens using Scotchbond Mp Plus and One-Step. Most cylindrical specimens of bonding area 1.1 or 1.5 mm² exhibited adhesive failure at the interface between the dentin and the adhesive resin. No differences were determined between cylindrical and rectangular specimens. The fracture mode matched the stress distribution patterns calculated from the FEA modeling Significance. The results indicate that the test methods using small surface areas produce higher bond strengths than those using larger surface areas, and that cross-sectional shape has little effect. This is probably a result of fewer defects occurring in the small-area specimens. [ABSTRACT FROM AUTHOR]
Copyright of Dental Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 50912989
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  Data: The influence of cross-sectional shape and surface area on the microtensile bond test.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Phrukkanon%2C+Suwachai%22&quot;&gt;Phrukkanon, Suwachai&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;i&gt; S.Prukkanon@dent.unimelb.edu.au&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Burrow%2C+Michael+F%2E%22&quot;&gt;Burrow, Michael F.&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Tyas%2C+Martin+J%2E%22&quot;&gt;Tyas, Martin J.&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Dental+Materials%22&quot;&gt;Dental Materials&lt;/searchLink&gt;. Jun1998, Vol. 14 Issue 3, p212-221. 10p. 1 Black and White Photograph, 5 Diagrams, 6 Charts.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dentin%22&quot;&gt;Dentin&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dental+pulp%22&quot;&gt;Dental pulp&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dental+enamel%22&quot;&gt;Dental enamel&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dental+materials%22&quot;&gt;Dental materials&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dental+adhesives%22&quot;&gt;Dental adhesives&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Scanning+electron+microscopy%22&quot;&gt;Scanning electron microscopy&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
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  Data: Objectives. The purpose of this study was to determine the effect of the cross-sectional area shape (cylindrical vs. rectangular) and the bonding surface area on the microtensile bond strengths and stress distribution of four dentin adhesive systems (Scotchbond MP plus, OptiBond FL, OptiBond Solo, One-Step). In addition, finite element analysis (FEA) models were developed to investigate stress distributions. Methods. Extracted human molars were cut vertically and the occlusal enamel removed; one-half of the tooth was used for rectangular specimens, the other half for cylindrical specimens. The occlusal dentin was bonded according to the manufacturers&#39; directions and covered with a block of resin composite. For the cylindrical specimens, the bonded dentin was shaped with a diamond bur on a lathe to produce specimens of area 1.1, 1.5 or 3.1 mm&#178; at the bonded interface. The rectangular specimens were sectioned to obtain bar-shaped specimens which, were shaped to produce hour-glass shaped specimens with the same area as the round specimens. Bonds were stressed in tension at a speed of 1 mm min-1. The mean bond strengths were compared using two-way ANOVA, one-way ANOVA, LSD and Student&#39;s t tests. The fractured surfaces were examined by scanning electron microscopy, and the frequencies of the fracture modes were compared using the Kruskal-Wallis and Mann-Whitney U tests. FEA models were created simulating the cross-sectional areas for bonding to determine the stress distribution. Results. The 3.1 mm&#178; bonding area groups showed significantly lower bond strengths than the 1.1 mm&#178; bonding area groups (p &lt; 0.05), except for the rectangular specimens using Scotchbond Mp Plus and One-Step. Most cylindrical specimens of bonding area 1.1 or 1.5 mm&#178; exhibited adhesive failure at the interface between the dentin and the adhesive resin. No differences were determined between cylindrical and rectangular specimens. The fracture mode matched the stress distribution patterns calculated from the FEA modeling Significance. The results indicate that the test methods using small surface areas produce higher bond strengths than those using larger surface areas, and that cross-sectional shape has little effect. This is probably a result of fewer defects occurring in the small-area specimens. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Dental Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 212
    Subjects:
      – SubjectFull: Dentin
        Type: general
      – SubjectFull: Dental pulp
        Type: general
      – SubjectFull: Dental enamel
        Type: general
      – SubjectFull: Dental materials
        Type: general
      – SubjectFull: Dental adhesives
        Type: general
      – SubjectFull: Scanning electron microscopy
        Type: general
    Titles:
      – TitleFull: The influence of cross-sectional shape and surface area on the microtensile bond test.
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            NameFull: Phrukkanon, Suwachai
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            NameFull: Burrow, Michael F.
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            NameFull: Tyas, Martin J.
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            – D: 01
              M: 06
              Text: Jun1998
              Type: published
              Y: 1998
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              Value: 14
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            – TitleFull: Dental Materials
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