View in EDS

Transient and residual stresses induced during the sintering of two dentin ceramics

Saved in:
Bibliographic Details
Title: Transient and residual stresses induced during the sintering of two dentin ceramics
Authors: Isgró, G.1, Addison, O.2, Fleming, G.J.P.1 garry.fleming@dental.tcd.ie
Source: Dental Materials. Apr2011, Vol. 27 Issue 4, p379-385. 7p.
Subjects: Residual stresses, Sintering, Dental ceramics, Deformations (Mechanics), Strength of materials, Silicon nitride, Analysis of variance, Profilometer
Abstract: Abstract: Objectives: To characterize the stress induced deformation of bi-axial flexure strength (BFS) test specimens during processing to provide an insight into sintering effects and associated BFS determination. Methods: 40 Vitadur-Alpha and 80 IPS e.max Ceram disc-shaped specimens were condensed and a sintered on a silicon nitride refractory tray under controlled firing and cooling parameters. The mean of the maximum deflection (μm) and Ra values (μm) were determined using a high resolution profilometer and were related to the orientation of the measured surface within the furnace. BFS testing of the subsequent groups (n =20) was performed and the data related to the measured deformation of the sintered specimens. A two-way analysis of variance (ANOVA) where factors were identified as surface state and firing orientation with post hoc Tukey''s tests was complemented by pair-wise comparisons with a Student''s t-test for each measurement (P <0.05). Results: The mean of the maximum deflection values and the mean BFS for Vitadur Alpha discs were not significantly influenced by firing orientation (P =0.248 and P =0.284, respectively). However, the Ra values were significantly different (P <0.001). The two-way ANOVA revealed a significant impact on the mean of the maximum deflection measurements for surface state (P <0.001) and firing orientation (P <0.001) during sintering (P <0.001). The mean Ra values were not significantly influenced. The BFS of sintered IPS e.max Ceram discs was sensitive to firing orientation (P <0.001). Significance: Conventional glass theory explains that residual thermal stress gradients induced during sintering can cause test specimen deformation which can alter the expected BFS data. The study demonstrates that variability such as firing orientation during sintering which is very rarely reported in the literature can have a significant impact on the reported BFS data and can confound its interpretation. [Copyright &y& Elsevier]
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.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 58747413
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Transient and residual stresses induced during the sintering of two dentin ceramics
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Isgr&#243;%2C+G%2E%22&quot;&gt;Isgr&#243;, G.&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Addison%2C+O%2E%22&quot;&gt;Addison, O.&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Fleming%2C+G%2EJ%2EP%2E%22&quot;&gt;Fleming, G.J.P.&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;i&gt; garry.fleming@dental.tcd.ie&lt;/i&gt;
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Dental+Materials%22&quot;&gt;Dental Materials&lt;/searchLink&gt;. Apr2011, Vol. 27 Issue 4, p379-385. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Residual+stresses%22&quot;&gt;Residual stresses&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Sintering%22&quot;&gt;Sintering&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Dental+ceramics%22&quot;&gt;Dental ceramics&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Deformations+%28Mechanics%29%22&quot;&gt;Deformations (Mechanics)&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Strength+of+materials%22&quot;&gt;Strength of materials&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Silicon+nitride%22&quot;&gt;Silicon nitride&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Analysis+of+variance%22&quot;&gt;Analysis of variance&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Profilometer%22&quot;&gt;Profilometer&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Objectives: To characterize the stress induced deformation of bi-axial flexure strength (BFS) test specimens during processing to provide an insight into sintering effects and associated BFS determination. Methods: 40 Vitadur-Alpha and 80 IPS e.max Ceram disc-shaped specimens were condensed and a sintered on a silicon nitride refractory tray under controlled firing and cooling parameters. The mean of the maximum deflection (μm) and Ra values (μm) were determined using a high resolution profilometer and were related to the orientation of the measured surface within the furnace. BFS testing of the subsequent groups (n =20) was performed and the data related to the measured deformation of the sintered specimens. A two-way analysis of variance (ANOVA) where factors were identified as surface state and firing orientation with post hoc Tukey&#39;&#39;s tests was complemented by pair-wise comparisons with a Student&#39;&#39;s t-test for each measurement (P &lt;0.05). Results: The mean of the maximum deflection values and the mean BFS for Vitadur Alpha discs were not significantly influenced by firing orientation (P =0.248 and P =0.284, respectively). However, the Ra values were significantly different (P &lt;0.001). The two-way ANOVA revealed a significant impact on the mean of the maximum deflection measurements for surface state (P &lt;0.001) and firing orientation (P &lt;0.001) during sintering (P &lt;0.001). The mean Ra values were not significantly influenced. The BFS of sintered IPS e.max Ceram discs was sensitive to firing orientation (P &lt;0.001). Significance: Conventional glass theory explains that residual thermal stress gradients induced during sintering can cause test specimen deformation which can alter the expected BFS data. The study demonstrates that variability such as firing orientation during sintering which is very rarely reported in the literature can have a significant impact on the reported BFS data and can confound its interpretation. [Copyright &amp;y&amp; Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=58747413
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.dental.2010.11.018
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 379
    Subjects:
      – SubjectFull: Residual stresses
        Type: general
      – SubjectFull: Sintering
        Type: general
      – SubjectFull: Dental ceramics
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Strength of materials
        Type: general
      – SubjectFull: Silicon nitride
        Type: general
      – SubjectFull: Analysis of variance
        Type: general
      – SubjectFull: Profilometer
        Type: general
    Titles:
      – TitleFull: Transient and residual stresses induced during the sintering of two dentin ceramics
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Isgró, G.
      – PersonEntity:
          Name:
            NameFull: Addison, O.
      – PersonEntity:
          Name:
            NameFull: Fleming, G.J.P.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 04
              Text: Apr2011
              Type: published
              Y: 2011
          Identifiers:
            – Type: issn-print
              Value: 01095641
          Numbering:
            – Type: volume
              Value: 27
            – Type: issue
              Value: 4
          Titles:
            – TitleFull: Dental Materials
              Type: main
ResultId 1