Preformed Laminating Veneer Porcelain Using Paste System for Fabrication of PFM Crowns

2005 ◽  
Vol 284-286 ◽  
pp. 937-940
Author(s):  
Myung Hyun Lee ◽  
Jung Suk Han ◽  
Dae Hyun Kim ◽  
Nam Sik Oh ◽  
Hyeong Seob Kim
Keyword(s):  
Flexural Strength ◽  
Physical Properties ◽  
Color Difference ◽  
Partial Denture ◽  
Organic Vehicle ◽  
Fixed Partial Denture ◽  
Biaxial Flexural Strength ◽  
Feldspathic Porcelain ◽  
The Mean

Feldspathic porcelain paste system using organic vehicle was prepared and applied to fabricate the porcelain fused to metal fixed partial denture. The mean linear fired shrinkage of paste porcelain system was 15.2% that is 0.8% lower than that of conventional build-up method. The color difference between two methods (􀁕E*) was 0.156. Mean biaxial flexural strength of sintered preformed laminating porcelains of this system and conventionally build-up porcelains were 74±3 and 70±4 MPa respectively. There was no deterioration of physical properties of feldspathic porcelain system by introducing organic vehicle, and this new build-up method can be applied to fabricate the porcelain fused to metal restorations.

scholarly journals Biaxial Flexural Strength of High-Translucence Monolithic Ceramics upon Various Thicknesses

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Niwut Juntavee ◽  
Apa Juntavee ◽  
Sirintana Phetpanompond
Keyword(s):  
Flexural Strength ◽  
Testing Machine ◽  
Lithium Silicate ◽  
Stabilized Zirconia ◽  
Varying Thickness ◽  
Significant Difference ◽  
Biaxial Flexural Strength ◽  
Yttria Partially Stabilized Zirconia ◽  
The Mean ◽  
Monolithic Ceramics

Introduction. High-translucence ceramics have been used increasingly. This study evaluated the biaxial flexural strength of different ceramics as a result of varying thicknesses. Materials and Methods. Circular discs with varied thickness of 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm were prepared from high-translucence yttria-partially stabilized zirconia (HTY-PSZ); Bruxzir® Anterior (Bc), and zirconia-reinforced lithium silicate (ZLS) including Celtra® DUO (Cc) and VITA Suprinity® (Vc) (n = 15 discs/group). Biaxial flexural strength (σ) was evaluated utilizing piston-on-three-balls in a testing machine at a speed of 0.5 mm/min. A scanning electron microscope (SEM) was used to determine the microscopic structure. ANOVA and multiple comparisons were analyzed for significant differences (a = 0.05). Results. The mean ± sd value of σ (MPa) for thickness 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0 mm was 672.66 ± 107.54, 655.93 ± 93.98, 589.01 ± 63.63, 624.89 ± 87.08, 618.82 ± 83.36, 672.64 ± 84.61, 659.81 ± 122.89, 632.79 ± 92.54, and 657.86 ± 73.17, for Bc; 477.64 ± 88.23, 496.39 ± 86.36, 461.56 ± 57.00, 450.26 ± 86.60, 468.28 ± 83.65, 472.45 ± 53.63, 453.05 ± 72.50, 462.67 ± 47.57, and 535.28 ± 84.33, for Cc; and 500.97 ± 76.36, 506.70 ± 87.76, 557.82 ± 62.78, 543.76 ± 87.29, 507.53 ± 86.09, 502.46 ± 64.75, 557.70 ± 80.91, 527.04 ± 80.78, and 499.88 ± 57.35, for Vc. A significant difference in flexural strength was indicated among groups ( p < 0.05 ). Bc was significantly stronger than Cc and Vc ( p < 0.05 ). Varying thickness did not have a significant influence on strength ( p > 0.05 ). SEM revealed a tight arrangement of crystals for Bc and needle-like crystals diffusing in glass for Vc and Cc. Conclusion. Flexural strength of ceramics varied among types, but each retained strength equitably with varying thickness. HTY-PSZ was stronger than ZLS, but each was equally strong for thickness in the range of 0.4–2.0 mm.

Flexural strength of provisional crown and fixed partial denture resins

2002 ◽  
Vol 87 (2) ◽  
pp. 225-228 ◽  
Author(s):  
Debra R. Haselton ◽  
Ana M. Diaz-Arnold ◽  
Marcos A. Vargas
Keyword(s):  
Flexural Strength ◽  
Partial Denture ◽  
Fixed Partial Denture

scholarly journals Effects of Different Amine Activators on the Monomer Conversion, Biaxial Flexural Strength, and Color Stability of Experimental Provisional Dental Restorations

2021 ◽  
Author(s):  
Chawal Padunglappisit ◽  
Siwanath Posaya-anuwat ◽  
Varisara Sompoch ◽  
Poompat Piyawiwattanakoon ◽  
Piyaphong Panpisut
Keyword(s):  
Flexural Strength ◽  
Glycidyl Methacrylate ◽  
Color Stability ◽  
Monomer Conversion ◽  
Color Difference ◽  
Negligible Effect ◽  
Dental Restorations ◽  
Biaxial Flexural Strength ◽  
Ring Testing

Abstract Objective The aim was to assess the effect of different amine activators including N, N-dimethyl-p-toluidine (DMPT) or Na-N-tolyglycine glycidyl methacrylate (NTGGMA) on chemical-activated monomer conversion, biaxial flexural strength (BFS), and color stability of composites for provisional dental restorations. Materials and Methods Two formulations of composites containing either DMPT (D-temp) or NTGGMA (N-temp) were prepared. The degree of monomer conversion was assessed. The BFS of the materials was tested using the ball-on-ring testing jig. The color difference (∆E00) of the materials after immersion in water was also determined. The commercial comparisons were Unifast (UF), Protemp (PT), Luxacrown, and Luxatemp (LT). Results The monomer conversion of D-temp (57.4 ± 1.3%) was comparable to that of N-temp (59.0 ± 1.3%). The conversion of both D-temp and N-temp were higher than that of PT (48.1 ± 3.4%) and LT (48.0 ± 1.6%). BFS of both D-temp (164.2 ± 18.1 MPa) and N-temp (168.6 ± 8.9 MPa) were comparable but higher than that of UF (119.8 ± 13.6 MPa). ∆E00 of D-temp (2.7 ± 0.7) and N-temp (2.5 ± 0.8) were comparable but higher than that of other commercial materials (0.6–1.2). Conclusion The use of DMPT or NTGGMA showed negligible effect on monomer conversion, BFS, and color stability of the experimental provisional restorations. The conversion and BFS of the experimental materials were in the range of that obtained from commercial bis-acryl-based materials. However, the color stability of the experimental materials was lower than that of commercial materials.

scholarly journals Effects of Different Air Particle Abrasion Protocols on the Biaxial Flexural Strength and Fractography of High/Ultra-Translucent Zirconia

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 244
Author(s):  
Reem AlMutairi ◽  
Hend AlNahedh ◽  
Ahmed Maawadh ◽  
Ahmed Elhejazi
Keyword(s):  
Standard Deviation ◽  
Flexural Strength ◽  
Control Sample ◽  
Zirconia Ceramic ◽  
Air Abrasion ◽  
Zirconia Ceramics ◽  
Biaxial Flexural Strength ◽  
Monolithic Zirconia ◽  
The Mean ◽  
Post Hoc

In this study, the biaxial flexural strength (BFS) and fractography of high/ultra-translucent monolithic zirconia ceramics subjected to different mechanical surface pretreatments were evaluated. A total of 108 disc-shaped samples (12 mm diameter, 1.2 mm thickness) of three zirconia materials (5Y-ZP KATANA Zirconia UTML (ML), 3Y-TZP DD Bio ZX2 (DB), and 5Y-ZP DD cube X2 (DC)) were used. The BFS was investigated after subjecting the samples to surface treatment using air abrasion particles of two types (aluminum oxide or glass microbeads). The data were analyzed using two-way analysis of variance, followed by Scheffe’s post hoc test for multiple comparisons. The mean ± standard deviation BFS for DB was highest after treatment with 50 µm Al2O3 (1626.05 ± 31.9 MPa), with lower values being observed following treatment with 50 µm glass microbeads (1399.53 ± 24.2 MPa) and in the control sample (1198.51 ± 21.1 MPa). The mean ± standard deviation (SD) BFSs for DC and ML were the highest in the control groups. Surface air abrasion with 50 µm Al2O3 particles and 2 bar pressure is recommended for 3Y-TZP translucent zirconia, while no abrasion of 5Y-ZP translucent zirconia ceramic.

Flexural Strength of Provisional Crown and Fixed Partial Denture Resins

2017 ◽  
Vol 68 (1) ◽  
pp. 1003-1009
Author(s):  
Maha Salem Baaboud ◽  
Dhay Abdullah A. Al Tawi ◽  
Sawsan Badr Sehaqi
Keyword(s):  
Flexural Strength ◽  
Partial Denture ◽  
Fixed Partial Denture
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