Effect of Er,Cr:YSGG Laser Versus Acid Etching Surface Treatment on the Surface Roughness and Topography of Two Pressable Lithium Disilicate Ceramics. “In-Vitro Study”.

Tarek, Mohamed; Mosleh, I; Zaghloul, Hanaa

doi:10.21608/edj.2021.63693.1507

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…In addition, inappropriate use of the hydrofluoric acid etchant can cause surface microdefects, grooves, and fissures in lithium disilicate ceramic. Therefore, Lithium disilicate ceramics can be weakened by hydrofluoric acid if the acid is not used correctly per the manufacturer's guidelines (Tarek, 2021).…”

Section: Introduction 444mentioning

confidence: 99%

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

Noor Azad Mohammed*,

Zainab F. Al-Bawi,

Balsam saadi Abdulhameed

2023

IJL

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The use of indirect, all-ceramic restorations has grown in popularity among dentists. Studies have demonstrated that for indirect ceramic restorations to be effective over time, cement and ceramic must be bonded in a stable manner. Chemical, mechanical, and laser irradiation are among the methods used to precondition ceramic surfaces in order to increase bond strength.The objective of the study: This study was performed to investigate the roughness values and surface topography of lithium disilicate glass-ceramic treated with conventional methods and different Er,Cr:YSGG, and fractional CO2 laser conditioning parameters.Material and methods: Sixty samples of lithium disilicate glass-ceramic were divided as follows: 1- (n = 10) untreated; 2- (n = 10) Hydrofluoric acid etched; 3- (n = 10) conditioned by Er,Cr: YSGG laser at (7 W, 25 Hz, 50/50% Water/Air, pulse duration 60 us, irradiation time 2 min); 4- (n = 10) conditioned by Er,Cr:YSGG laser at (5 W, 25 Hz, 50/50% Water/Air, pulse duration 60 us, irradiation time 2 min); 5- (n = 10) conditioned by fractional CO2 laser at (power 8 W, pulse duration 10 ms); 6- (n = 10) conditioned by fractional CO2 laser at (power 6 W, pulse duration 10 ms). Then evaluated by: Profilometer, and scanning electron microscopy.Results: The highest roughness values were found in CO2 laser power 8 W treated samples, followed by Er,Cr:YSGG laser power 7W treated samples. The hydrofluoric acid-etched samples showed roughness values comparable to those of CO2 laser-irradiated samples with a power of 6 W. The untreated sample showed the smoothest surface with the lowest roughness value.Conclusion: The application of Er,Cr:YSGG, fractional CO2 lasers enhances the surface roughness of lithium disilicate samples positively, showing the promised results of using these parameters in bonding procedures.

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Section: Introduction 444mentioning

confidence: 99%

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

Noor Azad Mohammed*,

Zainab F. Al-Bawi,

Balsam saadi Abdulhameed

2023

IJL

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The Influence of Thermal Tempering on the Fracture Resistance of Four Heat Pressed Lithia-based glass ceramic Crowns

Nasser,

EL-Etreby,

Nabih

2024

Preprint

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Background This in-vitro study aimed to evaluate the impact of thermal tempering and ceramic type on the fracture resistance of four heat-pressed glass ceramics. Methods A total of 84 glass-ceramic crowns were pressed and randomly allocated into four equal groups (n=21) according to the ceramic type: Group (E): IPS e.max Press, Group (L): GC initial LiSi Press, Group (C): Celtra Press and Group (A): VITA Ambria. The crowns of each group were equally allocated into three subgroups (n = 7) regarding the subsequent thermal tempering temperature. Subgroup (T0): No tempering. Subgroup (T1): Tempering at 9% below pressing temperature. Subgroup (T2): Tempering at 5% below pressing temperature. Samples were tested for fracture resistance using a universal testing machine. A scanning electron microscope, X-ray diffraction and Energy Dispersive x-ray analysis were utilized to disclose the microstructural features. Results When there is no tempering, IPS e.max press showed a significant elevated fracture resistance. There was an insignificant difference between other ceramics. While with tempering (T2) as well as (T1), Lisi press (L) showed a significant elevated fracture resistance. There was an insignificant difference between other ceramics. Conclusions Incorporation of zirconia oxide into the lithium disilicate glass matrix did not show improvement in the fracture resistance. Thermal tempering procedure had significant effect on fracture resistance.

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Effect of Different Surface Treatments of Glass Fiber Posts on their Surface Roughness and Flexure Properties

Hesham

Hashem

Hamza³

2021

Open Access Maced J Med Sci

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AIM: This study aimed to assess the effect of different surface treatments on the surface roughness and flexure properties of glass fiber posts “GFPs.” MATERIALS AND METHODS: A total of 40 GFPs were divided into four groups (n = 10): GC – no surface treatment (control), GSB – sandblasted, GHF – hydrofluoric acid etched, and GL – Er: YAG laser irradiated. Surface roughness was detected using surface profilometer and the 3-points bending flexural test measured flexural strength and elastic modulus. RESULTS: GSB showed the highest mean roughness followed by GHF, then GL, while GC had lowest roughness mean value. The 3 points bending test results were calculated and recorded, GSB exhibited the highest flexure stress (MPa) compared to GHF and GL. Modulus of elasticity (GPa) showed significant differences between the tested groups, GSB showed the highest modulus of elasticity compared to GHF and GL, while GC showed insignificant differences with all tested groups. CONCLUSION: Different surface treatments postulated in this study showed alternations of GFPs surfaces without jeopardizing the mechanical properties of GFPs.

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Effect of Er,Cr:YSGG Laser Versus Acid Etching Surface Treatment on the Surface Roughness and Topography of Two Pressable Lithium Disilicate Ceramics. “In-Vitro Study”.

Cited by 3 publications

References 39 publications

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

Evaluation of Lithium Disilicate Surface Morphology Treated with Er,Cr:YSGG and Fractional CO2 Laser

The Influence of Thermal Tempering on the Fracture Resistance of Four Heat Pressed Lithia-based glass ceramic Crowns

Effect of Different Surface Treatments of Glass Fiber Posts on their Surface Roughness and Flexure Properties

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