scholarly journals UV-Mediated Photofunctionalization of Indirect Restorative Materials Enhances Bonding to a Resin-Based Luting Agent

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Kyoko Ishikawa ◽  
Monica Yamauti ◽  
Antonin Tichy ◽  
Masaomi Ikeda ◽  
Takeshi Ueno ◽  
...  
Keyword(s):  
Resin Cement ◽  
Bonferroni Correction ◽  
Optimum Conditions ◽  
Control Groups ◽  
Bonding Performance ◽  
Carbon Adsorption ◽  
Luting Agent ◽  
Restorative Materials ◽  
Cad Cam ◽  
Bond Strengths

Purpose. The potential of UV-mediated photofunctionalization to enhance the resin-based luting agent bonding performance to aged materials was investigated. Methods. Sixty samples of each material were prepared. Yttria-stabilized zirconia (YZr) and Pd-Au alloy (Pd-Au) plates were fabricated and sandblasted. Lithium disilicate glass-ceramic (LDS) was CAD-CAM prepared and ground with #800 SiC paper. Half of the specimens were immersed in machine oil for 24 h to simulate the carbon adsorption. Then, all of the specimens (noncarbon- and carbon-adsorbed) were submitted to UV-mediated photofunctionalization with a 15 W UV-LED (265 nm, 300 mA, 7692 μW/cm2) for 0 (control groups), 5, and 15 min and subjected to contact angle (Ɵ) measurement and bonded using a resin cement (Panavia™ V5, Kuraray Noritake, Japan). The tensile bond strength (TBS) test was performed after 24 h. The Ɵ (°) and TBS (MPa) data were statistically analyzed using two-way ANOVA and Bonferroni correction tests ( α = 0.05 ). Results. In the carbon-adsorbed groups, UV-mediated photofunctionalization for 5 min significantly decreased Ɵ of all materials and increased TBS of YZr, and UV for 15 min significantly increased the TBS of LDS and Pd-Au. In noncarbon-adsorbed groups, UV-photofunctionalization did not significantly change the Ɵ or TBS except YZr specimens UV-photofunctionalized for 15 min. Conclusion. UV-mediated photofunctionalization might have removed the adsorbed hydrocarbon molecules from the materials’ surfaces and enhanced bond strengths of Panavia™ V5 to YZr, LDS, and Pd-Au. Additionally, UV-mediated photofunctionalization improved the overall TBS of YZr. Further investigation on the optimum conditions of UV photofunctionalization on indirect restorative materials should be conducted.

scholarly journals Effect of the amount of light energy transmitted through CAD/CAM resin block on bonding performance of four types of resin cement adhesive systems

2020 ◽  
Vol 39 (5) ◽  
pp. 792-802
Author(s):  
Kaho ABE ◽  
Takashi ASANO ◽  
Masahiro AIDA ◽  
Norihiro NISHIYAMA ◽  
Osamu KOMIYAMA
Keyword(s):  
Light Energy ◽  
Resin Cement ◽  
Adhesive Systems ◽  
Bonding Performance ◽  
Cad Cam

scholarly journals The effects of different surface treatments on the shear bond strengths of two dual-cure resin cements to CAD/CAM restorative materials

2020 ◽  
Vol 12 (4) ◽  
pp. 189
Author(s):  
Nurullah Turker ◽  
Ulviye Şebnem Buyukkaplan ◽  
Ebru Kaya Başar ◽  
Mehmet Mustafa Özarslan
Keyword(s):  
Surface Treatments ◽  
Resin Cements ◽  
Restorative Materials ◽  
Cad Cam ◽  
Bond Strengths

Tensile bond strengths of five luting agents to two CAD-CAM restorative materials and enamel

2003 ◽  
Vol 90 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Jeffrey Chai Chang ◽  
Deborah A Hart ◽  
Allan W Estey ◽  
Jarvis T Chan
Keyword(s):  
Luting Agents ◽  
Restorative Materials ◽  
Cad Cam ◽  
Bond Strengths ◽  
Tensile Bond Strengths

scholarly journals Effect of Surface Coating on Bond Strength between Etched Feldspar Ceramic and Resin-Based Luting Agents

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Jader Sebben ◽  
Volni A. Canevese ◽  
Rodrigo Alessandretti ◽  
Gabriel K. R. Pereira ◽  
Rafael Sarkis-Onofre ◽  
...  
Keyword(s):  
Bond Strength ◽  
Acrylic Resin ◽  
Resin Cement ◽  
Universal Adhesive ◽  
Luting Agents ◽  
Luting Agent ◽  
Bond Strengths ◽  
Microshear Bond Strength ◽  
Unfilled Resin ◽  
Effect Of Surface

This study evaluated adhesive protocols (silane, silane and unfilled resin, and universal adhesive) of bond strength between feldspar ceramic and resin-based luting agents (RBLAs). Thirty ceramic disks were embedded into acrylic resin, polished, etched, and randomly divided into 6 groups: S-RC: silane (S) and light-cured resin cement (RC) (RelyX Veneer; 3M ESPE); SB-RC: S followed by bond (B) (Clearfil SE Bond, Kuraray) and RC; UA-RC: universal adhesive (UA) (Single Bond Universal; 3M ESPE) and RC; flowable composite resin (F) was used on groups S-F, SB-F, and UA-F, and luting agent cylinders were built. The response variables (n=20) were microshear bond strength (MPa), characteristic strength (σ0, MPa), and Weibull modulus (m). The RC groups presented similar bond strengths regardless of whether or not bond was used. The S-F group with only silane application showed the highest bond strength, while the universal adhesive showed the lowest bond strength. The reliability was only affected in the UA-RC group, which was lower than the S-F group. Silane application is fundamental since the universal adhesive only decreased the bond strength between the feldspar ceramic and the RBLAs. Overall, the use of unfilled resin did not positively influence bond strength.

scholarly journals Influence of Alumina Air-Abrasion on Flexural and Shear Bond Strengths of CAD/CAM Composite

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 927
Author(s):  
Pirat Karntiang ◽  
Hiroshi Ikeda ◽  
Yuki Nagamatsu ◽  
Hiroshi Shimizu
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Cement ◽  
Bending Test ◽  
Air Abrasion ◽  
Iso Standard ◽  
Three Point Bending ◽  
Significant Difference ◽  
Cad Cam ◽  
Bond Strengths

The purpose of this study was to clarify the influence of alumina air-abrasion on flexural and bond strengths of CAD/CAM composites. The flexural strength (FS) of two brands of commercial CAD/CAM composites was investigated by the three-point bending test using two specimen designs: the single-bar according to the ISO standard and the bonded-double-bar fabricated by bonding two bars with a resin cement. The bond strength between the composites and the resin cement was measured by a conventional shear bond strength (SBS) test. The FS of single-bar specimens was significantly decreased by the air-abrasion. For the FS of the bonded-double-bar specimen, on the other hand, there was no significant difference between the specimens with/without air-abrasion. The SBS for the composites was significantly increased by air-abrasion. The results suggest that alumina air-abrasion improves the SBS of the composites while weakening its FS. Contrarily, the FS of the air-abraded composite did not decrease when the composites were bonded with the resin cement.

scholarly journals In vitro Evaluation of the Marginal Fit and Internal Adaptation of Zirconia and Lithium Disilicate Single Crowns: Micro-CT Comparison Between Different Manufacturing Procedures

2018 ◽  
Vol 12 (1) ◽  
pp. 160-172 ◽  
Author(s):  
Francesco Riccitiello ◽  
Massimo Amato ◽  
Renato Leone ◽  
Gianrico Spagnuolo ◽  
Roberto Sorrentino
Keyword(s):  
Clinical Success ◽  
Lithium Disilicate ◽  
Resin Cement ◽  
Micro Ct ◽  
Marginal Fit ◽  
Restorative Materials ◽  
Cad Cam ◽  
Internal Adaptation ◽  
Single Crowns

Background:Prosthetic precision can be affected by several variables, such as restorative materials, manufacturing procedures, framework design, cementation techniques and aging. Marginal adaptation is critical for long-term longevity and clinical success of dental restorations. Marginal misfit may lead to cement exposure to oral fluids, resulting in microleakage and cement dissolution. As a consequence, marginal discrepancies enhance percolation of bacteria, food and oral debris, potentially causing secondary caries, endodontic inflammation and periodontal disease.Objective:The aim of the presentin vitrostudy was to evaluate the marginal and internal adaptation of zirconia and lithium disilicate single crowns, produced with different manufacturing procedures.Methods:Forty-five intact human maxillary premolars were prepared for single crowns by means of standardized preparations. All-ceramic crowns were fabricated with either CAD-CAM or heat-pressing procedures (CAD-CAM zirconia, CAD-CAM lithium disilicate, heat-pressed lithium disilicate) and cemented onto the teeth with a universal resin cement. Non-destructive micro-CT scanning was used to achieve the marginal and internal gaps in the coronal and sagittal planes; then, precision of fit measurements were calculated in a dedicated software and the results were statistically analyzed.Results:The heat-pressed lithium disilicate crowns were significantly less accurate at the prosthetic margins (p<0.05) while they performed better at the occlusal surface (p<0.05). No significant differences were noticed between CAD-CAM zirconia and lithium disilicate crowns (p>0.05); nevertheless CAD-CAM zirconia copings presented the best marginal fit among the experimental groups. As to the thickness of the cement layer, reduced amounts of luting agent were noticed at the finishing line, whereas a thicker layer was reported at the occlusal level.Conclusion:Within the limitations of the presentin vitroinvestigation, the following conclusions can be drawn: the recorded marginal gaps were within the clinical acceptability irrespective of both the restorative material and the manufacturing procedures; the CAD-CAM processing techniques for both zirconia and lithium disilicate produced more consistent marginal gaps than the heat-pressing procedures; the tested universal resin cement can be safely used with both restorative materials.

Does a Self-etching Ceramic Primer Improve Bonding to Lithium Disilicate Ceramics? Bond Strengths and FESEM Analyses

2019 ◽  
Vol 44 (2) ◽  
pp. 210-218 ◽  
Author(s):  
GC Lopes ◽  
J Perdigão ◽  
D Baptista ◽  
A Ballarin
Keyword(s):  
Failure Mode ◽  
Lithium Disilicate ◽  
Resin Cement ◽  
Control Group ◽  
Shear Mode ◽  
Bond Strengths ◽  
Post Hoc ◽  
Microshear Bond Strength ◽  
And Control ◽  
Silane Solution

SUMMARY Objective: To compare the effect of hydrofluoric acid (HF) vs self-etching ceramic primer on resin cement microshear bond strength (μSBS) and ultramorphology of lithium disilicate (LD) ceramic. Methods and Materials: LD (IPS e.max CAD, Ivoclar Vivadent) blocks (14×4×2 mm3) were polished to 1200 grit and assigned to nine groups (n=5): CON: control, no LD surface treatment; IVO: 5.0% HF (IPS Ceramic Etching Gel, Ivoclar Vivadent); VIT: 5.0% HF (Vita Ceramics Etch, VITA Zahnfabrik); FGM: 5.0% HF (Condac Porcelana, FGM); ULT: 9.0% HF (Porcelain Etch, Ultradent); PRM: 9.6% HF (Premier Porcelain Etch Gel, Premier); BIS: 9.5% HF (Porcelain Etchant, Bisco Inc); DEN: 10.0% HF (Condicionador de Porcelanas, Dentsply Brazil); and MEP: self-etching ceramic primer (Monobond Etch & Prime, Ivoclar Vivadent). For all HF groups and control, an MDP-containing silane solution (MB+, Monobond Plus, Ivoclar Vivadent) was applied on rinsing the HF gel and air drying. Three transparent matrices for each specimen were filled with light-cured resin cement (Variolink Veneer, Ivoclar Vivadent). After storage in water for 48 hours at 37°C, specimens were tested in shear mode to measure μSBS. Mode of failure was analyzed at 50×. Statistical analysis included one-way analysis of variance and the Duncan post hoc test (α=0.05). Thirty-six additional LD specimens were assigned to the same experimental groups (n=4) and observed under a field-emission scanning electron microscope (FESEM) at magnifications ranging from 10,000× to 100,000×. Results: IVO resulted in statistically higher mean μSBS than all the other groups. MEP resulted in statistically lower μSBS than all HF groups. The failure mode for MEP was predominantly adhesive. The most frequent failure mode for the HF groups was mixed. CON resulted in 100% pretesting failures. For FESEM, no retentive pattern was observed for CON specimens. MEP resulted in the least pronounced etching pattern, few areas around crystals exhibited a slight increase in retention pattern compared to the control group. All HF gels created microporosities on the LD surface with distinct etching patterns. VIT and DEN resulted in an LD ultramorphology that suggested overetching. Conclusions: HF etching followed by a silane solution resulted in higher bond strengths than a self-etching ceramic primer. Some HF gels may cause overetching of the LD intaglio surface.

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