Effect of ceramic thickness, translucency and cement shade on color masking ability of pressable zirconia based lithium silicate laminate veneer

Abdullah, Mohamed

doi:10.21608/edj.2021.75764.1628

Cited by 3 publications

(4 citation statements)

References 33 publications

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“…The shape of an FDP is not constant, but varies in terms of its complex structure, consisting of many concave and convex contours depending on the geometry. In particular, because connectors need to be small for biological and esthetic reasons, they experience greater stress levels than elsewhere in cantilever RBFDPs [29]. In this study, the connector area of the cantilever pontic was adjusted for all designs to 16 mm, as recommended by the manufacturer for ZLS 2 in the posterior region.…”

Section: Discussionmentioning

confidence: 99%

“…One of the significant limitations of this study was that the load was applied vertically rather than laterally, as in the oral condition [29]. Restorations were subjected to a 1-year artificial thermomechanical aging process.…”

Section: Discussionmentioning

confidence: 99%

“…The flexural strength of ZLS (405−553 MPa) has been reported to be higher than that of lithium disilicate (300−441 MPa). In 2019, zirconia-reinforced lithium disilicate (ZLS 2 ) was presented as a pressable pellet (Vita Ambria, Vita Zahnfabrik, Germany) with a biaxial flexural strength of 550 MPa [29]. However, its mechanical behavior when manufacturing RBFDPs remains scarce in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Cantilever resin-bonded fixed dental prosthesis to substitute a single premolar: Impact of retainer design and ceramic material after dynamic loading

et al. 2023

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To evaluate the influence of retainer design and ceramic materials on the durability of minimally invasive cantilever resin-bonded fixed dental prostheses (RBFDPs) after artificial aging. Methods: One hundred caries-free human mandibular molars were prepared as abutments for all-ceramic cantilevered fixed dental prostheses using the following retainer designs: One wing (OW), Two wings (TW), Inlay ring (IR), Lingual coverage (LC), and Occlusal coverage (OC). Two ceramic materials were used: monolithic high translucent zirconia(z) and zirconia-reinforced lithium disilicate (ZLS 2 ) (n=10). All restorations were adhesively bonded with resin cement. The thermocycling of the specimens were performed between 5°C and 55°C for 10,000 cycles and then exposed to 240.000 cycles of dynamic loading on a chewing simulator. All surviving specimens were loaded onto the pontic until failure using a universal testing machine. Results: The mean failure load ranged from 124.00 to 627.00 N for the zirconia groups and from 133.30 to 230.00 N for the ZLS 2 groups. Regarding the materials, a significantly higher failure load was recorded in the zirconia groups than in the ZLS 2 groups (P<0.001), except for OW (P=0.748). Regarding the retainer designs, a significant different failure load was recorded between the different designs except for IR and LC in the zirconia groups, IR and OC, OW and TW, and TW and LC in the ZLS 2 groups (P<0.001). Conclusions: Zirconia IR, LC, and OC can be used as cantilever RBFDP in the premolar region. The fracture resistance of the ZLS 2 design was below the normal bite force and should not be recommended as the first option.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cantilever resin-bonded fixed dental prosthesis to substitute a single premolar: Impact of retainer design and ceramic material after dynamic loading

et al. 2023

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“…For instance, the thickness of the IPS Empress all-ceramic material must reach 1.6 mm to completely cover the base layer's color [75]. When the thickness of the veneer is less than 1 mm, the expected change in the color of the abutment and the adhesive can be observed with the naked eye, and the apparent final color change can be seen [76]. Therefore, when using thinner porcelain veneers for restoration, the appropriate adhesive can be selected by the color of the abutment.…”

Section: The Color Effect Of Micro-veneermentioning

confidence: 99%

Research Progress and Clinical Application of All-Ceramic Micro-Veneer

Jiang²,

Yang

et al. 2023

Materials

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Anterior teeth problems affect the patient’s daily eating, communication, social activities, self-confidence, and mental health. The trend in dentistry is to address anterior tooth problems with minimally invasive and aesthetic treatments. With the development of adhesive materials and ceramics, micro-veneers have been proposed as an alternative treatment for enhancing the aesthetic appearance and avoiding unnecessary tooth reduction. A micro-veneer is a veneer that can be cemented to the surface without or with minimal tooth preparation. These benefits include no need for anesthesia, postoperative insensitivity, good adhesion to enamel, reversibility of treatment, and higher patient acceptance. However, the micro-veneer repair is suitable only for specific cases and must be strictly controlled regarding indication. Treatment planning is a crucial step to achieving functional and aesthetic rehabilitation, and following the clinical protocol is helpful for the longevity and success of micro-veneer restorations. However, more precise and predictable tooth preparation methods, such as minimally invasive microscopic tooth preparation and digitally guided veneer preparation, are recommended rather than the traditional free-hand method. Therefore, this paper clarifies micro-veneers and compares them with other restorations to gain a deeper and more comprehensive understanding. The authors also review indications, materials, cementation, and effect evaluation of micro-veneers to provide clinicians with valuable information. In conclusion, micro-veneers are minimally invasive treatments that provide good restoration results when used appropriately and are worthy of promotion for the aesthetic restoration of anterior teeth.

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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 ceramic thickness, translucency and cement shade on color masking ability of pressable zirconia based lithium silicate laminate veneer

Cited by 3 publications

References 33 publications

Cantilever resin-bonded fixed dental prosthesis to substitute a single premolar: Impact of retainer design and ceramic material after dynamic loading

Cantilever resin-bonded fixed dental prosthesis to substitute a single premolar: Impact of retainer design and ceramic material after dynamic loading

Research Progress and Clinical Application of All-Ceramic Micro-Veneer

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

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