scholarly journals Shear Bond Strength of Porcelain Veneering to Nickel-Chromium, Chromium-Cobalt, Zirconia and Lithium Disilicate

2020 ◽  
Vol 32 (1) ◽  
pp. 12-20
Author(s):  
Davood Bahri ◽  
Sayed Khatiboleslam Sadrnezhaad ◽  
Sara Koosha ◽  
Najmeh Najmoddin ◽  
◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Lithium Disilicate ◽  
Nickel Chromium

scholarly journals Comparison of Shear Bond Strength Orthodontic Brackets Bonded to Zirconia and Lithium Disilicate Crowns

2019 ◽  
Vol 53 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Blerim Mehmeti ◽  
Jeta Kelmendi ◽  
Donika Iiljazi-Shahiqi ◽  
Bleron Azizi ◽  
Suzana Jakovljevic ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Lithium Disilicate ◽  
Orthodontic Brackets

scholarly journals The Influence of Different Surface Cleansing Agents on Shear Bond Strength of Contaminated Lithium Disilicate Ceramic: An In Vitro Study

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Taksid Charasseangpaisarn ◽  
Pattarawadee Krassanairawiwong ◽  
Chanidapa Sangkanchanavanich ◽  
Atima Kurjirattikan ◽  
Kanyarak Kunyawatyuwapong ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Sodium Hydroxide Solution ◽  
Resin Composite ◽  
In Vitro Study ◽  
Lithium Disilicate ◽  
Surface Element ◽  
Similar Amount ◽  
Modes Of Failure

Background and Purpose. Contamination of the lithium disilicate (LDS) during the try-in procedure is unavoidable and may weaken the bond strength of restoration. The purpose of this study was to investigate the efficacy of different surface cleansing agents on the shear bond strength (SBS) of contaminated LDS. Materials and Methods. Seventy LDS specimens were randomly divided into seven groups. The first group was noncontaminated surface (PC). The six other groups were contaminated with the saliva and silicone disclosing medium and treated with no surface cleansing agent (NC); phosphoric acid (PO); Ivoclean (IV); sodium hydroxide solution (NA); Restorative Cleansing Agent (RC); and hydrofluoric acid (HF). Then, LDS specimens were cementated with Panavia V5 to resin composite rod. Each specimen was subjected to an SBS test. The modes of failure was inspected under light microscope. The surface element of each group was examined by SEM-EDS. Results. The results were analyzed with one-way ANOVA and Tamhane’s T2. The mean SBS value of NC was significantly lower than others ( p < 0.05 ), and HF was significantly higher than others ( p < 0.05 ). However, PC, PO, IV, NA, and RC were not significantly different from each other ( p > 0.05 ). The mode of failure was mostly adhesive failure in every group. The surface showed similar amount of elements in every group. Conclusions. The SBS of LDS was reduced by saliva and silicone disclosing medium contamination which can be restored using acid- and alkaline-based surface cleansing agents before the cementation procedure.

scholarly journals Improving shear bond strength between feldspathic porcelain and zirconia substructure with lithium disilicate glass-ceramic liner

2015 ◽  
Vol 34 (3) ◽  
pp. 302-309 ◽  
Author(s):  
Kamolporn WATTANASIRMKIT ◽  
Viritpon SRIMANEEPONG ◽  
Kanchana KANCHANATAWEWAT ◽  
Naruporn MONMATURAPOJ ◽  
Pasutha THUNYAKITPISAL ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Ceramic ◽  
Shear Bond Strength ◽  
Lithium Disilicate ◽  
Ceramic Liner ◽  
Feldspathic Porcelain

scholarly journals Post-etching cleaning influences the resin shear bond strength to CAD/CAM lithium-disilicate ceramics

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Greciana Bruzi ◽  
Adriana Oliveira Carvalho ◽  
Marcelo Giannini ◽  
Hamilton Pires Maia ◽  
Pascal Magne
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Lithium Disilicate ◽  
Cad Cam

scholarly journals Influence of Etching Protocol and Silane Treatment with a Universal Adhesive on Lithium Disilicate Bond Strength

2015 ◽  
Vol 40 (4) ◽  
pp. 372-378 ◽  
Author(s):  
VK Kalavacharla ◽  
NC Lawson ◽  
LC Ramp ◽  
JO Burgess
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Lithium Disilicate ◽  
Ceramic Surface ◽  
Silane Treatment ◽  
Universal Adhesive ◽  
Plastic Tube ◽  
C 50 ◽  
Post Hoc

SUMMARY Objectives To measure the effects of hydrofluoric acid (HF) etching and silane prior to the application of a universal adhesive on the bond strength between lithium disilicate and a resin. Methods and Materials Sixty blocks of lithium disilicate (e.max CAD, Ivoclar Vivadent) were sectioned into coupons and polished. Specimens were divided into six groups (n=10) based on surface pretreatments, as follows: 1) no treatment (control); 2) 5% HF etch for 20 seconds (5HF); 3) 9.5% HF etch for 60 seconds (9.5HF); 4) silane with no HF (S); 5) 5% HF for 20 seconds + silane (5HFS); and 6) 9.5% HF for 60 seconds + silane (9.5HFS). All etching was followed by rinsing, and all silane was applied in one coat for 20 seconds and then dried. The universal adhesive (Scotchbond Universal, 3M ESPE) was applied onto the pretreated ceramic surface, air thinned, and light cured for 10 seconds. A 1.5-mm-diameter plastic tube filled with Z100 composite (3M ESPE) was applied over the bonded ceramic surface and light cured for 20 seconds on all four sides. The specimens were thermocycled for 10,000 cycles (5°C-50°C/15 s dwell time). Specimens were loaded until failure using a universal testing machine at a crosshead speed of 1 mm/min. The peak failure load was used to calculate the shear bond strength. Scanning electron microscopy images were taken of representative e.max specimens from each group. Results A two-way analysis of variance (ANOVA) determined that there were significant differences between HF etching, silane treatment, and the interaction between HF and silane treatment (p&lt;0.01). Silane treatment provided higher shear bond strength regardless of the use or concentration of the HF etchant. Individual one-way ANOVA and Tukey post hoc analyses were performed for each silane group. Shear bond strength values for each etch time were significantly different (p&lt;0.01) and could be divided into significantly different groups based on silane treatment: no silane treatment: 0 HF &lt; 5% HF &lt; 9.5% HF; and RelyX silane treatment: 0 HF &lt; 5% HF and 9.5% HF. Conclusions Both HF and silane treatment significantly improved the bond strength between resin and lithium disilicate when used with a universal adhesive.

scholarly journals Three-Dimensional Surface Evaluation and Shear Bond Strength of Three Pre-treatment E-max Surfaces for Metal and Ceramic Orthodontic Brackets

2020 ◽  
Vol 10 (2) ◽  
pp. 113-118
Author(s):  
Huda A. Mohammed ◽  
Omar S. Ali
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Roughness Parameter ◽  
Lithium Disilicate ◽  
Maximum Load ◽  
Maximum Height ◽  
Universal Adhesive ◽  
Ceramic Brackets ◽  
Pre Treatment

3D evaluation and shear bond strength (SBS) for metal and ceramic brackets after three pre-treatment surfaces of lithium disilicate (LD) crowns. Sixty lithium disilicate (LD) crowns were fabricated in laboratory according to manufacturer instruction and then divided into six groups (three groups for metal brackets and three groups for ceramic one). The 1st group for both was treated with round diamond bur, the 2nd one by hydrofluoric acid (HFA) 9.0%, and the 3rd group by laser (Er,Cr:YSGG). All treated surfaces were examined by laser profilometer and scan electron microscope. The Scotchbond Universal Adhesive and Transbond XT were used for bracketing procedure for metal and ceramic bracket (central incisor, 0,022” slot). Universal testing machine was used for shear bond. A crosshead speed of 1 mm/min was used, and the maximum load necessary to deboned the bracket will be recorded. HFA treated surfaces gave a highest SBS for both metal and ceramic brackets, then laser and finally the bur. The lowest roughness parameter Sa (arithmetical mean height) was in bur, both laser and HFA gave no significant differences. The HFA gave a highest Sz (maximum height) and Spc (arithmetic mean peak curvature) value. To increase the shear bond strength, the HFA is one of the best methods for roughness although the laser gave nearby roughness parameters. Ceramic brackets gave higher SBS than metal one with all pre-treatment procedures.

scholarly journals Surface Treatment Effect on Shear Bond Strength between Lithium Disilicate Glass-Ceramic and Resin Cement

2021 ◽  
Author(s):  
Siripan Simasetha ◽  
Awiruth Klaisiri ◽  
Tool Sriamporn ◽  
Kraisorn Sappayatosok ◽  
Niyom Thamrongananskul
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Glass Ceramic ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Lithium Disilicate ◽  
Surface Treatments ◽  
Resin Cement ◽  
Control Group ◽  
Ceramic Bond

Abstract Objective The study aimed to evaluate the shear bond strength (SBS) of lithium disilicate glass-ceramic (LDGC) and resin cement (RC) using different surface treatments. Materials and Methods LDGC blocks (Vintage LD Press) were prepared, etched with 4.5% hydrofluoric acid, and randomly divided into seven groups (n = 10), depending on the surface treatments. The groups were divided as follows: 1) no surface treatment (control), 2) Silane Primer (KS), 3) Signum Ceramic Bond I (SGI), 4) Signum Ceramic Bond I/Signum Ceramic Bond II (SGI/SGII), 5) experimental silane (EXP), 6) experimental silane/Signum Ceramic Bond II (EXP/SGII), and 7) Experimental/Adper Scotchbond Multi-purpose Adhesive (EXP/ADP). The specimens were cemented to resin composite blocks with resin cement and stored in water at 37 °C for 24 hours. The specimens underwent 5,000 thermal cycles and were subjected to the SBS test. Mode of failure was evaluated under the stereo microscope. Statistical Analysis Data were analyzed with Welch ANOVA and Games-Howell post hoc tests (α = 0.05). Results The highest mean SBS showed in group EXP/ADP (45.49 ± 3.37 MPa); however, this was not significantly different from group EXP/SGII (41.38 ± 2.17 MPa) (p ≥ 0.05). The lowest SBS was shown in the control group (18.36 ± 0.69 MPa). This was not significantly different from group KS (20.17 ± 1.10 MPa) (p ≥ 0.05). Conclusions The different surface treatments significantly affected the SBS value between LDGC and RC. The application of pure silane coupling agent with or without the application of an adhesive improved the SBS value and bond quality.

scholarly journals Shear bond strength of dental porcelains to nickel-chromium alloys

2005 ◽  
Vol 16 (3) ◽  
pp. 202-206 ◽  
Author(s):  
Ricardo Alves do Prado ◽  
Heitor Panzeri ◽  
Alfredo Julio Fernandes Neto ◽  
Flávio Domingues das Neves ◽  
Marlete Ribeiro da Silva ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Metal Alloys ◽  
Ceramic System ◽  
Shear Forces ◽  
Nickel Chromium ◽  
Chromium Alloys ◽  
Significant Difference ◽  
Bond Strengths

The continuous technological advance and increasing availability of new base metal alloys and ceramic systems in the market, coupled to the demands of daily clinical practice, have made the constant evaluation of the bond strength of metal/porcelain combinations necessary. This study evaluated the metal/porcelain shear bond strength of three ceramic systems (Duceram, Williams and Noritake) in combination with three nickel-chromium (Ni-Cr) alloys (Durabond, Verabond and Viron). Thirty cast cylinder specimens (15 mm high; 6 mm in diameter) were obtained for each alloy, in a way that 10 specimens of each alloy were tested with each porcelain. Bond strength was measured with an Emic screw-driven mechanical testing machine by applying parallel shear forces to the specimens until fracture. Shear strength was calculated using the ratio of the force applied to a demarcated area of the opaque layer. Mann-Whitney U test was used for statistical analysis of the alloy/ceramic combinations (p<0.05). Viron/Noritake had the highest shear bond sregnth means (32.93 MPa), while Verabond/Duceram (16.31 MPa) presented the lowest means. Viron/Noritake differed statistically from other combinations (p<0.05). Viron/Duceram had statistically significant higher bond strengths than Verabond/Duceram, Verabond/Williams and Durabond/Noritake (p<0.05). It was also found significant difference (p<0.05) between Verabond/Noritake, Verabond/Duceram and Durabond/Noritake. No statistically significant difference (p>0.05) were observed among the other combinations. In conclusion, the Noritake ceramic system used together with Viron alloy presented the highest resistance to shear forces, while Duceram bonded to Verabond presented the lowest bond strength. Viron/Duceram and Verabond/Noritake provided intermediate results. The combinations between the Williams ceramic system and Ni-Cr alloys had similar shear strengths among each other.

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