Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics
Objectives: This investigation was carried out to examine the influence of thermocycling aging on the surface roughness (Ra, µm), color parameters (L*, a*, b*), lightness change (ΔL*), chroma change (ΔC*ab), color change (ΔE), and microhardness (VH) of three lithium disilicate ceramics. Materials an...
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| Format: | Article |
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Springer
2022-11-01
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| Series: | Saudi Dental Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1013905222000980 |
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| author | Ahmad M. Al-Thobity Abdulkareem M. AlOtaibi Abdulrahman E. Alhumaidan Ahmed A. Aldossary Intisar Ahmad Siddiqui Mohamed Ahmed Helal Abdulmohsen Alsalman |
| author_facet | Ahmad M. Al-Thobity Abdulkareem M. AlOtaibi Abdulrahman E. Alhumaidan Ahmed A. Aldossary Intisar Ahmad Siddiqui Mohamed Ahmed Helal Abdulmohsen Alsalman |
| author_sort | Ahmad M. Al-Thobity |
| collection | DOAJ |
| description | Objectives: This investigation was carried out to examine the influence of thermocycling aging on the surface roughness (Ra, µm), color parameters (L*, a*, b*), lightness change (ΔL*), chroma change (ΔC*ab), color change (ΔE), and microhardness (VH) of three lithium disilicate ceramics. Materials and methods: Forty-five specimens were prepared from three lithium disilicate materials (n = 15)—e.max CAD (EC), e.max Press (EP), and GC Initial LiSi Press (LP) ceramics—with dimensions of 6.0 × 1.2 × 16.0 ± 0.2 mm following the manufacturers’ instructions. All specimens were exposed to 5000 thermal cycles with bath temperatures ranging between 5 °C and 55 °C. Data of surface roughness, color parameters, and microhardness were obtained using an optical profiler, a spectrophotometer, and a Vickers hardness tester, respectively. One-way ANOVA, a post-hoc Tukey’s test, and a paired sample t-test were implemented for statistical analysis (p ≤ 0.05). Results: For surface roughness, insignificant differences were reported between the materials either before or after thermocycling (p > 0.05) while each material displayed a significant increase after being subjected to thermocycling (p < 0.05). For color parameters, LP showed significantly lower L* and b* after thermocycling while EC presented a significant reduction in a* in comparison with other materials (p < 0.05). EP showed a significant decrease in ΔL*, ΔC*ab and ΔE compared with other materials (p < 0.05). Regarding microhardness, LP showed significantly increase value in comparison with other materials (p < 0.05). Conclusions: Thermocycling had a major impact on the surface roughness, microhardness and optical characteristics of the tested materials. E.max Press displayed less changes in (ΔL*), (ΔC*ab) and (ΔE), while GC LiSi Press had better behavior in terms of microhardness. |
| format | Article |
| id | doaj-art-0bffc4fd6d074bf2b821b5fce1ab23f5 |
| institution | Kabale University |
| issn | 1013-9052 |
| language | English |
| publishDate | 2022-11-01 |
| publisher | Springer |
| record_format | Article |
| series | Saudi Dental Journal |
| spelling | doaj-art-0bffc4fd6d074bf2b821b5fce1ab23f52025-08-20T03:48:31ZengSpringerSaudi Dental Journal1013-90522022-11-0134758959510.1016/j.sdentj.2022.08.004Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramicsAhmad M. Al-Thobity0Abdulkareem M. AlOtaibi1Abdulrahman E. Alhumaidan2Ahmed A. Aldossary3Intisar Ahmad Siddiqui4Mohamed Ahmed Helal5Abdulmohsen Alsalman6Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia; Corresponding author.Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi ArabiaAlNairyah Primary Health Care Center, Ministry of Health, AlNairyah, Saudi ArabiaAlfaisaliah Primary Health Care Center, Ministry of Health, AlQaisumah, Saudi ArabiaDepartment of Dental Education, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi ArabiaDepartment of Removable Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Cairo, EgyptDepartment of Dentistry, Armed Forced Hospital Dhahran, Dhahran, Saudi ArabiaObjectives: This investigation was carried out to examine the influence of thermocycling aging on the surface roughness (Ra, µm), color parameters (L*, a*, b*), lightness change (ΔL*), chroma change (ΔC*ab), color change (ΔE), and microhardness (VH) of three lithium disilicate ceramics. Materials and methods: Forty-five specimens were prepared from three lithium disilicate materials (n = 15)—e.max CAD (EC), e.max Press (EP), and GC Initial LiSi Press (LP) ceramics—with dimensions of 6.0 × 1.2 × 16.0 ± 0.2 mm following the manufacturers’ instructions. All specimens were exposed to 5000 thermal cycles with bath temperatures ranging between 5 °C and 55 °C. Data of surface roughness, color parameters, and microhardness were obtained using an optical profiler, a spectrophotometer, and a Vickers hardness tester, respectively. One-way ANOVA, a post-hoc Tukey’s test, and a paired sample t-test were implemented for statistical analysis (p ≤ 0.05). Results: For surface roughness, insignificant differences were reported between the materials either before or after thermocycling (p > 0.05) while each material displayed a significant increase after being subjected to thermocycling (p < 0.05). For color parameters, LP showed significantly lower L* and b* after thermocycling while EC presented a significant reduction in a* in comparison with other materials (p < 0.05). EP showed a significant decrease in ΔL*, ΔC*ab and ΔE compared with other materials (p < 0.05). Regarding microhardness, LP showed significantly increase value in comparison with other materials (p < 0.05). Conclusions: Thermocycling had a major impact on the surface roughness, microhardness and optical characteristics of the tested materials. E.max Press displayed less changes in (ΔL*), (ΔC*ab) and (ΔE), while GC LiSi Press had better behavior in terms of microhardness.http://www.sciencedirect.com/science/article/pii/S1013905222000980Lithium disilicateSurface roughnessColor changeMicrohardnessCeramics |
| spellingShingle | Ahmad M. Al-Thobity Abdulkareem M. AlOtaibi Abdulrahman E. Alhumaidan Ahmed A. Aldossary Intisar Ahmad Siddiqui Mohamed Ahmed Helal Abdulmohsen Alsalman Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics Saudi Dental Journal Lithium disilicate Surface roughness Color change Microhardness Ceramics |
| title | Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics |
| title_full | Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics |
| title_fullStr | Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics |
| title_full_unstemmed | Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics |
| title_short | Impact of thermocycling on surface roughness, microhardness and optical properties of three different lithium disilicate ceramics |
| title_sort | impact of thermocycling on surface roughness microhardness and optical properties of three different lithium disilicate ceramics |
| topic | Lithium disilicate Surface roughness Color change Microhardness Ceramics |
| url | http://www.sciencedirect.com/science/article/pii/S1013905222000980 |
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