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On the durability of zirconia-reinforced lithium silicate and lithium disilicate dental ceramics under severe contact.

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Title: On the durability of zirconia-reinforced lithium silicate and lithium disilicate dental ceramics under severe contact.
Authors: Rodríguez-Rojas, Fernando1 (AUTHOR), Borrero-López, Óscar1 (AUTHOR) oborlop@unex.es, Sánchez-González, Estíbaliz1 (AUTHOR), Hoffman, Mark2 (AUTHOR), Guiberteau, Fernando1 (AUTHOR)
Source: Wear. Nov2022, Vol. 508, pN.PAG-N.PAG. 1p.
Subjects: Lithium silicates, Mechanical behavior of materials, Dental ceramics, Dental materials, Durability, Dental fillings, Contact mechanics, Fracture strength
Abstract: Zirconia-reinforced lithium silicates (ZLS) are a novel generation of aesthetic, lithium-based ceramics intended for use in dental restorations at high loads due to their enhanced fracture strength compared to the previous lithium disilicate (LS2) materials. However, under severe dental conditions, material durability in service may be limited by wear from repetitive, frictional contacts. Here, a comparison is made between commercial ZLS and LS2 dental ceramics of their severe wear behavior under sliding contact against hard zirconia antagonists by means of in-vitro pin-on-disk tests. Specific wear rates greater than 10−6 mm3/N⋅m are obtained. The mechanisms responsible for material removal are a combination of deformation and fracture. Results are discussed in terms of the materials' microstructure and mechanical properties. In combination with analytical modelling, ZLS dental ceramics are estimated to be up to 5 times less durable than LS2 under conditions modelling heavy chewing/bruxism. Finally, implications for the microstructural design of novel lithium silicate/disilicate materials with improved durability are considered. • Wear tests on lithium-based dental materials are conducted with a view to assessing durability under severe chewing conditions. • Wear behavior depends on material microstructure and mechanical properties. Results are analyzed using contact mechanics. • Zirconia-reinforced lithium silicate is estimated to be 5x less durable than lithium disilicate under severe conditions. • Implications for the microstructural design of novel lithium-based dental materials with improved durability are discussed. [ABSTRACT FROM AUTHOR]
Copyright of Wear 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
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Header DbId: egs
DbLabel: Engineering Source
An: 159095440
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: On the durability of zirconia-reinforced lithium silicate and lithium disilicate dental ceramics under severe contact.
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  Data: <searchLink fieldCode="AR" term="%22Rodríguez-Rojas%2C+Fernando%22">Rodríguez-Rojas, Fernando</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Borrero-López%2C+Óscar%22">Borrero-López, Óscar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> oborlop@unex.es</i><br /><searchLink fieldCode="AR" term="%22Sánchez-González%2C+Estíbaliz%22">Sánchez-González, Estíbaliz</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hoffman%2C+Mark%22">Hoffman, Mark</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guiberteau%2C+Fernando%22">Guiberteau, Fernando</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Wear%22">Wear</searchLink>. Nov2022, Vol. 508, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Lithium+silicates%22">Lithium silicates</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Dental+ceramics%22">Dental ceramics</searchLink><br /><searchLink fieldCode="DE" term="%22Dental+materials%22">Dental materials</searchLink><br /><searchLink fieldCode="DE" term="%22Durability%22">Durability</searchLink><br /><searchLink fieldCode="DE" term="%22Dental+fillings%22">Dental fillings</searchLink><br /><searchLink fieldCode="DE" term="%22Contact+mechanics%22">Contact mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+strength%22">Fracture strength</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Zirconia-reinforced lithium silicates (ZLS) are a novel generation of aesthetic, lithium-based ceramics intended for use in dental restorations at high loads due to their enhanced fracture strength compared to the previous lithium disilicate (LS2) materials. However, under severe dental conditions, material durability in service may be limited by wear from repetitive, frictional contacts. Here, a comparison is made between commercial ZLS and LS2 dental ceramics of their severe wear behavior under sliding contact against hard zirconia antagonists by means of in-vitro pin-on-disk tests. Specific wear rates greater than 10−6 mm3/N⋅m are obtained. The mechanisms responsible for material removal are a combination of deformation and fracture. Results are discussed in terms of the materials' microstructure and mechanical properties. In combination with analytical modelling, ZLS dental ceramics are estimated to be up to 5 times less durable than LS2 under conditions modelling heavy chewing/bruxism. Finally, implications for the microstructural design of novel lithium silicate/disilicate materials with improved durability are considered. • Wear tests on lithium-based dental materials are conducted with a view to assessing durability under severe chewing conditions. • Wear behavior depends on material microstructure and mechanical properties. Results are analyzed using contact mechanics. • Zirconia-reinforced lithium silicate is estimated to be 5x less durable than lithium disilicate under severe conditions. • Implications for the microstructural design of novel lithium-based dental materials with improved durability are discussed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Wear 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.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.wear.2022.204460
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Lithium silicates
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Dental ceramics
        Type: general
      – SubjectFull: Dental materials
        Type: general
      – SubjectFull: Durability
        Type: general
      – SubjectFull: Dental fillings
        Type: general
      – SubjectFull: Contact mechanics
        Type: general
      – SubjectFull: Fracture strength
        Type: general
    Titles:
      – TitleFull: On the durability of zirconia-reinforced lithium silicate and lithium disilicate dental ceramics under severe contact.
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          Name:
            NameFull: Rodríguez-Rojas, Fernando
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            NameFull: Borrero-López, Óscar
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            NameFull: Sánchez-González, Estíbaliz
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            NameFull: Hoffman, Mark
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            NameFull: Guiberteau, Fernando
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            – D: 01
              M: 11
              Text: Nov2022
              Type: published
              Y: 2022
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              Value: 508
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            – TitleFull: Wear
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