Ceramic firing protocols and thermocycling: effects on the load-bearing capacity under fatigue of a bonded zirconia lithium silicate glass-ceramic

Diniz, Vandeberg; Prado, Pedro Henrique Condé Oliveira; Rodrigues, Jonas Vinicius Meireles; Monteiro, Jaiane Bandoli; Zucuni, Camila Pauleski; Valandro, Luiz Felipe; Melo, Renata Marques de

doi:10.1016/j.jmbbm.2020.103963

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…It was found that ZLS exhibited better mechanical properties than Li 2 Si 2 O 5 glass‐ceramics, confirming that the addition of ZrO 2 led to crack interruption and thus improved the fracture resistance toughness of the material 39,40 . The fatigue resistance of ZLS was found to meet the clinical requirements in bad load cyclic experiments 41–43 . The mechanical properties of Li 2 Si 2 O 5 glass‐ceramics increase with the increase of ZrO 2 content, and the aesthetic properties decrease with the increase of ZrO 2 content, but 65% ZrO 2 –35% SiO 2 glass‐ceramics still have good aesthetic properties 44 .…”

Section: Classification Of Glass‐ceramicsmentioning

confidence: 75%

“…39,40 The fatigue resistance of ZLS was found to meet the clinical requirements in bad load cyclic experiments. [41][42][43] The mechanical properties of Li 2 Si 2 O 5 glassceramics increase with the increase of ZrO 2 content, and the aesthetic F I G U R E 1 Relationship between fracture toughness and crystallized volume fraction for commercial restorative glass-ceramics. Reprinted with permission of Reference 35.…”

Section: Zirconia-reinforced LI 2 Si 2 O 5 Glass-ceramicsmentioning

confidence: 99%

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Recent advances in glass‐ceramics: Performance and toughening mechanisms in restorative dentistry

Liu,

Yao,

Zhang

et al. 2023

J Biomed Mater Res

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The use of glass‐ceramics in the medical field has grown significantly since the 1980s. With excellent aesthetic properties, semi‐translucency, outstanding mechanical properties, corrosion resistance, wear resistance and great biocompatibility and workability glass‐ceramics is one of the most commonly used materials in restorative dentistry and is widely used in veneers, inlays, onlays, all‐ceramic crowns, and implant abutments. This review provides an overview of the research progress of glass‐ceramics in restorative dentistry, focusing on the classification, performance requirements, toughening mechanisms and their association with clinical performance, as well as the manufacturing and fabrication of glass‐ceramics in restorative dentistry. Finally, the developments and prospects of glass‐ceramics in restorative dentistry are summarized and discussed.

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Section: Classification Of Glass‐ceramicsmentioning

confidence: 75%

Section: Zirconia-reinforced LI 2 Si 2 O 5 Glass-ceramicsmentioning

confidence: 99%

Recent advances in glass‐ceramics: Performance and toughening mechanisms in restorative dentistry

Liu,

Yao,

Zhang

et al. 2023

J Biomed Mater Res

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“…22,23 In this study, all specimens were thermo-cycled for 1000 cycles between 5 and 55 c before testing, a clinical condition that has been adopted by many studies. 14,24 Around 70% of the crystalline phase in LDGC is incorporated into the glassy matrix. In addition, the flexural strength of LDGC is 360 ± 60MPa, despite it having a high silica content of 55-65 weight percent.…”

Section: Discussionmentioning

confidence: 99%

Influence of Different Thicknesses of Monolithic Crowns Made from Different Resin-Bonded Glass Ceramic on Their Load-bearing Capacity (An in vitro Comparative Study)

Abdalla,

Al-Zahawi

2023

SDJ

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Objective: To investigate the load-bearing capacity of the full-coverage crowns made from lithium disilicate glass-ceramic LDGC (IPS e.max®, Ivoclar Vivadent) and 10% zirconia reinforced lithium silicate glass ceramic ZLS (Dentsply DeTrey) with different thicknesses. Methods: Forty resin dies with supporting bases were duplicated from two prepared typodont teeth for all-ceramic crowns as a maxillary first molar. Forty crowns corresponding to each die were prepared and then they were divided into four groups: Group I (n 10) made from ZLS with a restoration thickness of (1.0 mm occlusally and 1.0 mm radially) and Group II (n 10) made from LDGC with a restoration thickness of (1.0 mm occlusally and 1.0 mm radially), and Group III (n 10) made from ZLS (1.5 mm occlusally and 1.5mm radially) and Group IV (n 10) made from LDGC (1.5 mm occlusally and 1.5 radially). All crowns were fabricated by chair side CEREC CAD/CAM and crystallized with Speed fire Dentsply Furness. The virolink resin cement (VariolinkII, Ivoclar Vivadent) was used to bond the crowns to the corresponding dies. All samples were thermo-cycled (10000 cycles between 5c and 55c) and tested for fracture resistance using a Universal testing machine at 0.5 mm/minute speed until failure. ANOVA and Tukey HSD test were used to compare the fracture resistance between groups. Results: The result demonstrates that the fracture resistance means and SD of ZLS with different thicknesses ranged from 572 N ± 122.002 to 1171±217.432 N, and those of LDGC with different thicknesses ranged from 625 N ±151.676 N to 845 N ±388.222 N. Conclusions: The fracture resistance increased with increasing crown thickness using different glass-ceramic materials.

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“…(6) The tempering processes, which were proven by the staircase experimental approach, were found to increase the fatigue failure load. (7) Unlike traditional glaze firings, which can produce tensile stresses, this extended glaze firing method, after rigorous machining of ZLS, corrects faults by creating advantageous compressive residual stresses. (6) According to Apel et al 2007 (8) the high ZrO 2 level in glass ceramics causes higher viscosity and a decrease in crystal formation leaving the flexural strength to be affected by crystals orientation to the load beam.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Marginal Accuracy and Microstructure of Heat Pressed Lithium Disilicate and Zirconia Reinforced Lithium Silicate Crowns after Thermal Tempering

abdelkhader,

El-Etreby,

Emam

2023

Egyptian Dental Journal

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Objectives: To evaluate the effect of two thermal tempering cycles on marginal accuracy of crowns fabricated from two heat-pressed glass ceramics. Materials and methods:Twenty-eight ceramic crowns were pressed from glass ceramic materials in two groups (n=14). Group (E): Lithium disilicate IPS e.max Press, Group (C): Zirconia reinforced lithium silicate (ZLS) Celtra Press. Each group was subdivided according to tempering temperature into (T1) 9% and (T2) 5% below pressing temperature of each ceramic. A stereomicroscope was used to measure the marginal adaptation before and after tempering and microstructure was analyzed. Three-way ANOVA test was used to study the effect of ceramic type, tempering, tempering procedure and their interactions on marginal gap distance. Bonferroni's posthoc test was used for pair-wise comparisons when ANOVA test is significant. The significance level was set at P ≤ 0.05. Results:The interaction between the three variables had statistically significant effect on mean marginal gap distance (P-value <0.001). Before tempering and after (T1) tempering, there was no statistically significant difference between ceramic types (P-value = 0.577). After (T2) tempering, there was a statistically significant difference between ceramic types (P-value <0.001). Celtra showed statistically significantly higher mean marginal gap distance compared to E.max. Conclusions:Mean marginal gap distance for lithium disilicate was not affected after tempering. ZLS after -5% tempering showed the highest mean marginal gap distance. All tested groups showed clinically acceptable marginal adaptation except ZLS with -5% tempering which showed clinically unacceptable marginal adaptation >120 µm.

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Ceramic firing protocols and thermocycling: effects on the load-bearing capacity under fatigue of a bonded zirconia lithium silicate glass-ceramic

Cited by 8 publications

References 25 publications

Recent advances in glass‐ceramics: Performance and toughening mechanisms in restorative dentistry

Recent advances in glass‐ceramics: Performance and toughening mechanisms in restorative dentistry

Influence of Different Thicknesses of Monolithic Crowns Made from Different Resin-Bonded Glass Ceramic on Their Load-bearing Capacity (An in vitro Comparative Study)

Evaluation of Marginal Accuracy and Microstructure of Heat Pressed Lithium Disilicate and Zirconia Reinforced Lithium Silicate Crowns after Thermal Tempering

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