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Mechanical behavior of nano-hybrid composite in comparison to lithium disilicate as posterior cement-retained implant-supported crowns restoring different abutments.

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Title: Mechanical behavior of nano-hybrid composite in comparison to lithium disilicate as posterior cement-retained implant-supported crowns restoring different abutments.
Authors: Elsayed, Adham1 (AUTHOR) aelsayed@proth.uni-kiel.de, Yazigi, Christine1 (AUTHOR), Kern, Matthias1 (AUTHOR), Chaar, Mohamed Sad1 (AUTHOR) schaar@proth.uni-kiel.de
Source: Dental Materials. Aug2021, Vol. 37 Issue 8, pe435-e442. 8p.
Subjects: Fracture strength, Therapeutic use of lithium, Failure mode & effects analysis, Strength of materials, Tukey's test
Abstract: • Resin-based materials are gaining popularity due to their shock absorption capacity. • Combination of zirconia abutments and nano-hybrid composite showed promising strength. • Nano-hybrid composite showed comparable fracture strength to lithium disilicate. • The abutment material influenced the strength and failure mode of the restoration. Resin-based materials are gaining popularity in implant dentistry due to their shock absorption capacity. Therefore, the aim of this study was to evaluate the fracture strength and failure mode of resilient materials for both crowns and abutments and compare them to the most widely used materials in different combinations after subjection to long-term fatigue loading. Forty-eight cement-retained implant-restorations were assembled on titanium implants. Identical custom-made CAD/CAM abutments were milled out of 3 different materials (n = 16); T : titanium, Z : zirconia and P : ceramic-reinforced PEEK. Each group was subdivided, according to the restorative crown material, into two subgroups (n = 8); C : nano-hybrid composite and L : Lithium disilicate. Specimens were subjected to dynamic load of 98 N for 1,200,000 cycles with integrated thermal cycling. The surviving specimens were subjected to quasi-static loading until failure. Shapiro–Wilk test was used to test for normality. One-way ANOVA followed by Tukey's post-hoc test was used to detect statistically significant differences between groups. All specimens withstood 1,200,000 load cycles. The fracture strength values varied from a minimum of 1639 ± 205 N for group PL to a maximum of 2949 ± 478 N for group ZL. The abutment material influenced the fracture strength and failure mode of the restoration. A combination of zirconia abutments and nano-hybrid composite showed the most favorable mode of failure within the test groups. Therefore, this combination might be recommended as an alternative for restoring single implants in the posterior area. [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.)
Database: Engineering Source
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  Data: Mechanical behavior of nano-hybrid composite in comparison to lithium disilicate as posterior cement-retained implant-supported crowns restoring different abutments.
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  Data: <searchLink fieldCode="AR" term="%22Elsayed%2C+Adham%22">Elsayed, Adham</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> aelsayed@proth.uni-kiel.de</i><br /><searchLink fieldCode="AR" term="%22Yazigi%2C+Christine%22">Yazigi, Christine</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kern%2C+Matthias%22">Kern, Matthias</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chaar%2C+Mohamed+Sad%22">Chaar, Mohamed Sad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> schaar@proth.uni-kiel.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Dental+Materials%22">Dental Materials</searchLink>. Aug2021, Vol. 37 Issue 8, pe435-e442. 8p.
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  Data: • Resin-based materials are gaining popularity due to their shock absorption capacity. • Combination of zirconia abutments and nano-hybrid composite showed promising strength. • Nano-hybrid composite showed comparable fracture strength to lithium disilicate. • The abutment material influenced the strength and failure mode of the restoration. Resin-based materials are gaining popularity in implant dentistry due to their shock absorption capacity. Therefore, the aim of this study was to evaluate the fracture strength and failure mode of resilient materials for both crowns and abutments and compare them to the most widely used materials in different combinations after subjection to long-term fatigue loading. Forty-eight cement-retained implant-restorations were assembled on titanium implants. Identical custom-made CAD/CAM abutments were milled out of 3 different materials (n = 16); T : titanium, Z : zirconia and P : ceramic-reinforced PEEK. Each group was subdivided, according to the restorative crown material, into two subgroups (n = 8); C : nano-hybrid composite and L : Lithium disilicate. Specimens were subjected to dynamic load of 98 N for 1,200,000 cycles with integrated thermal cycling. The surviving specimens were subjected to quasi-static loading until failure. Shapiro–Wilk test was used to test for normality. One-way ANOVA followed by Tukey's post-hoc test was used to detect statistically significant differences between groups. All specimens withstood 1,200,000 load cycles. The fracture strength values varied from a minimum of 1639 ± 205 N for group PL to a maximum of 2949 ± 478 N for group ZL. The abutment material influenced the fracture strength and failure mode of the restoration. A combination of zirconia abutments and nano-hybrid composite showed the most favorable mode of failure within the test groups. Therefore, this combination might be recommended as an alternative for restoring single implants in the posterior area. [ABSTRACT FROM AUTHOR]
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  Data: <i>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.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.dental.2021.03.015
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        Text: English
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      – SubjectFull: Therapeutic use of lithium
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      – SubjectFull: Failure mode & effects analysis
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      – SubjectFull: Strength of materials
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      – TitleFull: Mechanical behavior of nano-hybrid composite in comparison to lithium disilicate as posterior cement-retained implant-supported crowns restoring different abutments.
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            NameFull: Elsayed, Adham
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            NameFull: Yazigi, Christine
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              M: 08
              Text: Aug2021
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              Y: 2021
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