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Keywords = self-adhesive resin cement

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19 pages, 4418 KiB  
Article
Interfacial Shrinkage Properties and Mechanism Analysis of Light-Conductive Resin–Cement-Based Materials
by Shengtian Zhai, Ran Hai, Zhihang Yu, Jianjun Ma, Chao Hou, Jiufu Zhang, Shaohua Du and Xingang Wang
Buildings 2025, 15(15), 2754; https://doi.org/10.3390/buildings15152754 - 5 Aug 2025
Abstract
To address the issue of interfacial shrinkage deformation in optical resin–cement-based composites, this study examined the effects of casting methods and coupling agent treatments on the interfacial deformation behavior and underlying mechanisms at the resin–cement interface. A self-developed interfacial shrinkage testing apparatus, combined [...] Read more.
To address the issue of interfacial shrinkage deformation in optical resin–cement-based composites, this study examined the effects of casting methods and coupling agent treatments on the interfacial deformation behavior and underlying mechanisms at the resin–cement interface. A self-developed interfacial shrinkage testing apparatus, combined with ABAQUS numerical simulations, was employed to facilitate this analysis. The results revealed that the interfacial shrinkage strain followed a characteristic distribution—higher at both ends and lower in the middle region—as the temperature increased. The experimental data showed a strong agreement with the simulation outcomes. A comparative analysis indicated that the pre-cast cement method reduced the interfacial shrinkage strain by 16% compared to the pre-cast resin method. Furthermore, treatment with a coupling agent resulted in a 31% reduction in the strain, while combining a serrated surface modification with a coupling agent treatment achieved a maximum reduction of 43.5%. Microscopic characterization confirmed that the synergy between the coupling agent and surface roughening significantly enhanced interfacial bonding by filling microcracks, improving adhesion, and increasing mechanical interlocking. This synergistic effect effectively suppressed the relative slippage caused by asynchronous shrinkage between dissimilar materials, thereby mitigating the interfacial cracking issue in optical resin–cement-based composites. These findings provide theoretical insights for optimizing the interface design in organic–inorganic composite systems. Full article
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15 pages, 1120 KiB  
Article
Effects of Preheating on the Mechanical Properties of Dental Composites
by Maher S. Hajjaj, Lama F. Alhowirini, Raneem S. Alghamdi, Yasser M. Merdad, Hanan K. Filemban, Marwa Bawazir, Khawlah A. Alothman, Najla Al Turkestani and Saeed J. Alzahrani
Crystals 2025, 15(7), 632; https://doi.org/10.3390/cryst15070632 - 9 Jul 2025
Viewed by 367
Abstract
The aim of this study was to evaluate the mechanical properties (flexural strength (FS), flexural modulus (FM), Vickers microhardness (VMN), and shear bond strength (SBS)) of preheated composites. Two preheated composites (Z350XT and Proclinic) and one self-adhesive resin cement (RelyX™ U200) were used [...] Read more.
The aim of this study was to evaluate the mechanical properties (flexural strength (FS), flexural modulus (FM), Vickers microhardness (VMN), and shear bond strength (SBS)) of preheated composites. Two preheated composites (Z350XT and Proclinic) and one self-adhesive resin cement (RelyX™ U200) were used to fabricate specimens. All the specimens were subjected to thermocycling before their mechanical properties were evaluated. One-way ANOVA was used for statistical analysis, followed by Tukey’s post hoc test. The chi-square test was used to evaluate the failure modes after SBS test. Results: RelyX™ U200 had a significantly higher FS (106.22 ± 14.23 MPa) than Proclinic (85.76 ± 12.75 MPa) and Z350 (71.47 ± 22.98 MPa). Z350 (118.10 ± 11.3 GPa) and RelyX™ U200 (110.88 ± 13.44 GPa) had significantly higher FMs than Proclinic (83.72 ± 9.3 GPa). A significantly higher VHN was seen with Z350 (136.84 ± 11.52 VHN) compared to Proclinic (115.25 ± 17.15 VHN) and RelyX™ U200 (100.83 ± 12.69 VHN). Z350 had a higher SBS (20.75 ± 5.6 MPa) than RelyX™ U200 (15.4 ± 3.46 MPa), while Proclinic was the weakest among all the groups (6.76 ± 1.44 MPa). In the failure mode analysis, the mixed failure mode was predominantly seen in all groups. In conclusion, not all preheated composites behave the same and it is the clinician’s responsibility to select the appropriate material for every clinical situation. Full article
(This article belongs to the Special Issue Structural and Characterization of Composite Materials)
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9 pages, 736 KiB  
Article
Effect of Two Different Adhesion Modes of a Universal Resin Cement on the Retention of Glass Fiber Posts Cemented to Root Canal Dentine: An In Vitro Study
by Rani D’haese, Valentin Vervack, Inas Hamid and Stefan Vandeweghe
Adhesives 2025, 1(2), 8; https://doi.org/10.3390/adhesives1020008 - 21 May 2025
Viewed by 493
Abstract
Purpose: The aim of this in vitro study was to investigate the adhesive bond strength of glass fiber posts when cemented with universal resin cement in two different adhesion modes: adhesive and self-adhesive. Methods: A total of 20 extracted single-root teeth were endodontically [...] Read more.
Purpose: The aim of this in vitro study was to investigate the adhesive bond strength of glass fiber posts when cemented with universal resin cement in two different adhesion modes: adhesive and self-adhesive. Methods: A total of 20 extracted single-root teeth were endodontically treated, decoronated and prepared to receive glass fiber posts (GFPs) with a diameter of 1.6 mm (RelyX fiber post 3D). Specimens were randomly divided into two groups: (G1) GFPs were cemented using RelyX Universal cement in self-adhesive mode, and (G2) GFPs were cemented using Scotch Bond Universal Plus and RelyX Universal cement (adhesive mode). Afterwards, the specimens were sliced at three root levels: coronal, middle and apical. Bond strength was measured using a push-out test. Data were analyzed with a two-way analysis of variance (ANOVA) test and independent sample T-test. Results: Bond strength was significantly influenced by the adhesive strategy (p < 0.025) and the position of the root third (p < 0.007). Microscopic analysis of failure mode revealed a higher prevalence of adhesive failures (cement–dentine). Conclusions: Glass fiber posts cemented with universal resin cement applied in adhesive mode showed significantly higher push-out bond strength than when applied in self-adhesive mode. In both study groups, the apical root regions exhibited the highest retention values, followed by the middle and coronal regions. Full article
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11 pages, 1813 KiB  
Article
Bond Strength of Universal Adhesive/Resin Cement Combinations Relying on Touch-Cure Mechanisms
by Annamaria Forte, Eugenia Baena, Claudia Mazzitelli, Edoardo Mancuso, Diego D’Urso, Gerardo Pellegrino, Laura Ceballos, Lorenzo Breschi, Annalisa Mazzoni and Tatjana Maravic
Polymers 2025, 17(9), 1224; https://doi.org/10.3390/polym17091224 - 29 Apr 2025
Viewed by 601
Abstract
New dual-curing resin cements are constantly launched into the market to improve the bond strength between dentine and indirect restorations when light irradiation is limited by the restoration material. The present study evaluated the microshear bond strength (μSBS) of two dual-cured resin cements, [...] Read more.
New dual-curing resin cements are constantly launched into the market to improve the bond strength between dentine and indirect restorations when light irradiation is limited by the restoration material. The present study evaluated the microshear bond strength (μSBS) of two dual-cured resin cements, Estecem II Plus (EP) and Variolink Esthetic DC (VAR), when resin composite or dentine substrates were conditioned with their corresponding universal adhesives, Tokuyama Universal Bond II (TUB) and Adhese Universal DC (ADH). The experimental groups (n = 20) were (1) TUB/EP light-cured, (2) TUB/EP self-cured, (3) ADH/VAR light-cured, and (4) ADH/VAR self-cured. A μSBS test was performed after 24 h (T0) or after thermocycling (TC), and failure modes were assessed. Data analysis was performed using three-way ANOVA and Tukey tests (p < 0.05). In composite, TUB/EP self-cured demonstrated the highest μSBS at T0 and TC. After TC, TUB/EP self-cured and ADH/VAR light-cured remained stable (p > 0.05). In dentine, TUB/EP light-cured was statistically superior to TUB/EP self-cured and ADH/VAR self-cured at T0. Thermocycling decreased the μSBS of light-curing groups. TUB/EP achieved optimal μSBS when the manufacturer’s instructions were followed and the adhesive was self-cured, irrespective of the bonding substrate. However, ADH/VAR was more dependent on the type of bonding substrate than on the curing mode of the resin cement. Full article
(This article belongs to the Section Polymer Applications)
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12 pages, 6585 KiB  
Article
Microtensile Bond Strength of Composite Restorations: Direct vs. Semi-Direct Technique Using the Same Adhesive System
by Paulo J. Palma, Maria A. Neto, Ana Messias and Ana M. Amaro
J. Compos. Sci. 2025, 9(5), 203; https://doi.org/10.3390/jcs9050203 - 24 Apr 2025
Cited by 1 | Viewed by 661
Abstract
The main purpose was to evaluate the in vitro adhesion strength of direct and semi-direct composite resin restorations in dentin, when the same adhesive system is applied, using microtensile testing (μTBS) and to observe the most recurrent types of failure in the different [...] Read more.
The main purpose was to evaluate the in vitro adhesion strength of direct and semi-direct composite resin restorations in dentin, when the same adhesive system is applied, using microtensile testing (μTBS) and to observe the most recurrent types of failure in the different groups. For this study, 16 intact human mandibular molars without microscopic evidence of lesions were randomly divided into two test groups, according to the restoration strategy: direct restoration (DR) and semi-direct restoration (SR). For both restorative strategies, the same adhesive system (Clearfil SE Bond 2, Kuraray, Tokyo, Japan) was applied to the dentin surface using a two-step self-etching approach with no prior conditioning of the dentin, and the same composite resin (Ceram. x Sepctra ST HV, Dentsply Sirona, Charlotte, NC, USA) was used as a restorative material. The indirect restoration was cemented using resin cement (Variolink Esthetic LC, Ivoclar Vivadent, Schaan, Liechtenstein) within the interior side of the restoration. Each specimen was sliced into sections measuring approximately 1 mm2. The rods were then subjected to a microtensile bond strength test and the statistical analysis on the differences in μTBS between the groups were determined with the Mann–Whitney test. The surfaces were examined to determine the failure mode. The Chi-Square test was used to determine the association between the type of restoration and the failure mode. The DR group presented with a mean μTBS of 38.15 ± 10.75 MPa and a predominance of cohesive failures in the composite resin (69.5%). The SR group showed a mean μTBS of 25.45 ± 10.19 MPa and a predominance of adhesive failures (92.3%). There was not only a statistically significant difference in the adhesive strength of the DR and SR groups (p < 0.001), but also a statistically significant association between the type of restorative strategy and failure mode (p < 0.001). Even though Clearfil SE Bond 2 provided acceptable adhesion to the dentin, using the same two-step self-etch adhesive system, lower adhesive strength and more adhesive failures are expected in semi-direct restorations when compared to direct restorations. Full article
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14 pages, 2166 KiB  
Article
The Influence of Tooth Primer and Zirconia Cleaners on the Shear Bond Strength of Saliva-Contaminated Zirconia Bonded with Self-Adhesive Resin Cement
by Vorrawatn Pornatitanakul, Awiruth Klaisiri, Tool Sriamporn, Somporn Swasdison and Niyom Thamrongananskul
Appl. Sci. 2025, 15(8), 4561; https://doi.org/10.3390/app15084561 - 21 Apr 2025
Viewed by 661
Abstract
This study investigated the effectiveness of Tooth Primer and cleaning agents in removing saliva contamination from zirconia as assessed using shear bond strength (SBS). A total of 175 rectangular specimens, 10 mm in diameter and 6 mm in thickness, were randomly divided into [...] Read more.
This study investigated the effectiveness of Tooth Primer and cleaning agents in removing saliva contamination from zirconia as assessed using shear bond strength (SBS). A total of 175 rectangular specimens, 10 mm in diameter and 6 mm in thickness, were randomly divided into seven groups (n = 25 each): group 1, no saliva contamination (control); group 2, saliva-contaminated and not rinsed; group 3, saliva-contaminated and rinsed; group 4, saliva-contaminated, Ivoclean-treated, and rinsed; group 5, saliva-contaminated, Katana Cleaner-treated, and rinsed; group 6, saliva-contaminated, Tooth Primer-treated, and rinsed; and group 7, saliva-contaminated, Tooth Primer-treated, and not rinsed. All zirconia specimens from groups 1–7 were bonded to composite rods with Panavia SA Luting Multi cement. The bonded specimens were subjected to the SBS test using a universal testing machine. To assess the type of failure, the debonded surface was evaluated using a stereomicroscope. The SBS data were analyzed using one-way ANOVA with Tukey’s post-test. The SBS values of groups 2 (0.90 ± 0.20 MPa) and 3 (1.35 ± 0.43 MPa) were significantly lower compared with the other groups (p = 0.00). The SBS value of zirconia decontamination using Ivoclean in group 4 (18.51 ± 3.01 MPa) was significantly lower than that of the control group (22.24 ± 2.37 MPa) (p = 0.00). However, the SBS values of groups 5 (20.92 ± 2.63 MPa), 6 (21.43 ± 2.81 MPa), and 7 (20.87 ± 2.35 MPa) did not significantly differ compared with the control group (22.24 ± 2.37 MPa) (p = 0.369, p = 0.861, p = 0.327, respectively). Moreover, SBS values did not significantly differ among groups 5 to 7 (p = 0.984, p = 1.00, p = 0.976, respectively). Regarding failure mode, groups 2 and 3 exclusively experienced adhesive failures. Groups 1, 4, 5, 6, and 7 exhibited adhesive and mixed failures. In conclusion, Ivoclean, Katana Cleaner, and Tooth Primer effectively mitigated the adverse effects of saliva contamination on the resin cement–zirconia interface. Furthermore, Tooth Primer can be used as a cleaner for saliva-contaminated zirconia surfaces, with or without rinsing. Full article
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21 pages, 13671 KiB  
Article
Influence of Self-Emulsifying Waterborne Epoxy Resin with Novel Hardeners on Pore Structure and Permeability of Cement-Based Materials
by Feifei Wang, Yunsheng Zhang, Xiaoyun Song, Lirong Liu, Xianglin Sun and Peifeng Sun
Buildings 2025, 15(7), 997; https://doi.org/10.3390/buildings15070997 - 21 Mar 2025
Cited by 4 | Viewed by 572
Abstract
With increasing service life, concrete durability gradually deteriorates, requiring urgent repair and reinforcement. Conventional cement-based repair materials exhibit disadvantages such as high brittleness, low tensile strength, poor adhesion, and insufficient durability, making them inadequate for high-quality structural repairs. Based on the molecular structure–activity [...] Read more.
With increasing service life, concrete durability gradually deteriorates, requiring urgent repair and reinforcement. Conventional cement-based repair materials exhibit disadvantages such as high brittleness, low tensile strength, poor adhesion, and insufficient durability, making them inadequate for high-quality structural repairs. Based on the molecular structure–activity relationship, this study developed a novel waterborne epoxy–cement-based composite repair material using self-synthesized waterborne epoxy resin (WEP). The mechanism by which WEP improves the performance of cement-based materials was elucidated. The results indicate that WEP significantly influenced the early formation of silicate crystals. Furthermore, the addition of WEP enhanced material flexibility and adhesion, achieving flexural strength of 12.9 MPa and direct tensile bond strength of 2.13 MPa at 28 days, representing increases of approximately 30% and 58%, respectively, compared to the control group. Stress–strain curve analysis revealed that the ultimate strain of WEP-modified cement mortar reached 0.024%. SEM analysis revealed that cured WEP formed a dense cross-linked network with cement hydration products. This microstructural modification refined the pore structure, effectively addressing the material’s brittleness, ductility, and durability limitations. Full article
(This article belongs to the Special Issue Sustainable Approaches to Building Repair)
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16 pages, 19319 KiB  
Article
Aging Effect on Push-Out Bond Strength of Six Resin Cements: An In Vitro Study
by Eugenia Baena, Nuria Escribano, Victoria Fuentes, Isabel Reche and Laura Ceballos
Materials 2025, 18(6), 1371; https://doi.org/10.3390/ma18061371 - 20 Mar 2025
Viewed by 1283
Abstract
The number of resin cements marketed for fiber post cementation has increased significantly. This study compared the push-out bond strength (PBS) of self-adhesive and universal resin cements used to lute fiber posts at 24 h and after 6 months of aging in artificial [...] Read more.
The number of resin cements marketed for fiber post cementation has increased significantly. This study compared the push-out bond strength (PBS) of self-adhesive and universal resin cements used to lute fiber posts at 24 h and after 6 months of aging in artificial saliva. Fiber posts were luted to eighty human roots endodontically treated with four self-adhesive/one-step resin cements, with one of them also used in combination with its appropriate tooth primer; one universal resin cement, applied as one-step or together with its corresponding universal adhesive (multi-step); and one adhesive/multi-step resin cement, as a control. After storage (24 h or 6 months), the interfaces were subjected to PBS tests and the data were analyzed by two-way ANOVA and Tukey and Student’s t-tests (p < 0.05 defined as statistical significance). The results showed that Scotchbond Universal Plus + RelyX Universal attained statistically higher values at 24 h and 6 months. At 24 h, all resin cements yielded similar PBS to root dentin, while at 6 months, NormoCem obtained the lowest PBS. Storage for 6 months significantly decreased PBS for NormoCem and Multilink Automix. Root section did not influence PBS regardless of storage time. It was concluded that PBS is resin cement dependent. The universal resin cement, RelyX Universal, applied in combination with Scotchbond Universal Plus adhesive, obtained a higher and more stable PBS than the other resin cements tested. Full article
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14 pages, 1861 KiB  
Article
Retention of Pediatric BioFlx Crowns Versus Stainless Steel Crowns Using Different Types of Luting Cements: An In Vitro Study
by Amjad A. AlMawash, Ayman M. Sulimany, Latifa A. Alhowaish, Abdullah S. Alayad and Omar A. Bawazir
Materials 2025, 18(6), 1287; https://doi.org/10.3390/ma18061287 - 14 Mar 2025
Viewed by 1165
Abstract
BioFlx crowns (BFCs) have been introduced in the dental market, combining the flexibility of stainless steel crowns (SSCs) with the esthetic appeal of preformed zirconia crowns. However, the existing literature does not provide adequate insights regarding the retentive strength of various types of [...] Read more.
BioFlx crowns (BFCs) have been introduced in the dental market, combining the flexibility of stainless steel crowns (SSCs) with the esthetic appeal of preformed zirconia crowns. However, the existing literature does not provide adequate insights regarding the retentive strength of various types of luting cement with these newly developed BFCs. Therefore, this study aimed to evaluate and compare the retentive strength of BFCs and SSCs with different types of luting cement (glass ionomer cement [GIC], resin-modified glass ionomer cement [RMGIC], self-adhesive resin cement [SARC], and polycarboxylate cement [PXC]). A total of 160 standardized resin dies were fabricated and divided into two groups based on the type of crown (BFCs or SSCs). Each group was further subdivided into four subgroups (20/group) based on the luting cement used for cementing the crown on the die. A pullout test was performed using a universal testing machine to measure the retentive strength required for crown dislodgement. The residual cement in the crown was scored to determine the cement failure pattern. Data were analyzed using two-way analyses of variance (ANOVAs) to evaluate the interaction between the cement and the type of crown on retentive strength, followed by an independent t-test. Furthermore, Welch’s ANOVA and Dunnett’s T3 test were used to assess the impact of various types of luting cement on the retentive strength of each crown. The CFP was assessed by comparing the scores using descriptive statistics. Statistical significance was set at p < 0.05. The mean retentive strength of SSCs and BFCs was the highest with SARC (560.29 ± 8.74 N; 657.72 ± 20.60 N), followed by RMGIC (534.20 ± 22.84 N; 454.90 ± 7.95 N) and GIC (435.14 ± 8.66 N; 237.68 ± 9.37 N), while the lowest was with PXC (365.67 ± 19.11 N; 131.26 ± 5.37 N). A significant difference in retention was observed between the crowns (p < 0.05). Cement failure primarily manifested as adhesive failures in the SARC and RMGIC groups; however, both adhesive and cohesive failures occurred in the GIC and PXC groups. Thus, SSCs demonstrate significantly higher retention than BFCs across all types of luting cements, except when using SARC. Within the limitations of this in vitro study, SSCs emerge as the preferred choice for full-coverage restorations that require optimal retention and durability. Nevertheless, BFCs with SARC provide a viable alternative when esthetic considerations are prioritized. Full article
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16 pages, 1728 KiB  
Article
Push-Out Bond Strength of Different Luting Cements Following Post Space Irrigation with 2% Chitosan: An In Vitro Study
by Shimaa Rifaat, Ahmed Rahoma, Hind Muneer Alharbi, Sawsan Jamal Kazim, Shrouq Ali Aljuaid, Basmah Omar Alakloby, Faraz A. Farooqi and Noha Taymour
Prosthesis 2025, 7(1), 18; https://doi.org/10.3390/prosthesis7010018 - 13 Feb 2025
Viewed by 1221
Abstract
Background: The optimum bond strength of glass fiber posts can be compromised; it has not yet been established which final irrigant, when used in combination with luting cement, can improve this bond strength. Objectives: This study assessed the effectiveness of 2% [...] Read more.
Background: The optimum bond strength of glass fiber posts can be compromised; it has not yet been established which final irrigant, when used in combination with luting cement, can improve this bond strength. Objectives: This study assessed the effectiveness of 2% chitosan as a final irrigant in combination with different types of luting cement used to improve the bond strength of glass fiber posts bonded to root canal-treated teeth. Methods: Thirty single-rooted anterior teeth were collected and sectioned 2 mm above the most incisal point of the cementoenamel junction. After root canal filling, post spaces were prepared and irrigated in Group I using 17% EDTA for 3 min and in Group II using 2% chitosan for 3 min. Each group was divided into three subgroups: Fiber posts were cemented in subgroup A with Fuji II Cement (resin-reinforced glass ionomer cement), in subgroup B with RelyX Unicem (self-adhesive resin cement), and in subgroup C with Metacem Refill (total-etch resin cement). Push-out bond strength (N) for each sample was measured using a universal testing machine, and the failure mode was assessed with a stereomicroscope at 30× magnification. The fiber post’s morphological structure was analyzed through scanning electron microscopy. Statistical analysis included one-way ANOVA followed by Tukey’s post hoc test in the case of significant differences between the groups. p-Values less than 0.05 were considered statistically significant. Results: This study found no statistically significant difference between using 17% EDTA and 2% chitosan as the final irrigant before post placement (p > 0.05). RelyX Unicem cement showed significant bonding strength when used with 2% chitosan in the coronal, middle, and apical thirds (p = 0.009, p = 0.02, p = 0.01, respectively). Conclusions: Chitosan at 2% can be considered a good alternative to 17% EDTA when used as a final irrigant for the post space. Full article
(This article belongs to the Special Issue Advancements in Adhesion Techniques and Materials in Prosthodontics)
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13 pages, 1404 KiB  
Article
Does Silane Application Affect Bond Strength Between Self-Adhesive Resin Cements and Feldspathic Porcelain?
by Pakpilai Thiranukoon, Awiruth Klaisiri, Tool Sriamporn, Somporn Swasdison and Niyom Thamrongananskul
J. Compos. Sci. 2025, 9(2), 52; https://doi.org/10.3390/jcs9020052 - 23 Jan 2025
Viewed by 1075
Abstract
This study aimed to evaluate the shear bond strengths of six self-adhesive resin cements (SACs) on porcelain surfaces and to compare the effectiveness with and without silane application. One hundred and twenty feldspathic porcelain specimens were prepared, etched with 9.5% HF, and divided [...] Read more.
This study aimed to evaluate the shear bond strengths of six self-adhesive resin cements (SACs) on porcelain surfaces and to compare the effectiveness with and without silane application. One hundred and twenty feldspathic porcelain specimens were prepared, etched with 9.5% HF, and divided into two main groups: (i) without silane, and (ii) with silane application. Each main group was further divided into six subgroups, testing six various SACs. Shear bond strength was measured using a universal testing machine, and the de-bonded surfaces were examined with a stereomicroscope. The statistical analysis was tested with two-way ANOVA and post hoc with Tukey’s. The results showed that Panavia SA Luting Multi had the highest shear bond strength, especially with silane application, while G-Cem One exhibited the lowest in the absence of silane. The addition of silane application significantly improved the shear bond strengths of G-Cem One, Panavia SA Luting Multi, and RelyX Unicem compared to situations without silane application. The adhesive and mixed failure modes were found to depend on the brand of SACs. No cohesive failure was detected. The study concludes that Panavia SA Luting Multi achieves superior shear bond strength on feldspathic porcelain when used with a separate silane agent. The etched feldspathic porcelain surface primed with silane coupling agent is recommended for optimal bond strength when using with SACs such as G-Cem One, Panavia SA Luting Multi, or RelyX Unicem. Full article
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10 pages, 4816 KiB  
Article
The Effect of a Dual Cure Activator on Self-Adhesive Resin Cements and Zirconia Shear Bond Strength
by Phalat Akrawatcharawittaya, Tool Sriamporn, Suchada Vuddhakanok, Niyom Thamrongananskul and Awiruth Klaisiri
Ceramics 2024, 7(3), 1237-1246; https://doi.org/10.3390/ceramics7030082 - 15 Sep 2024
Cited by 3 | Viewed by 1829
Abstract
This study examines the impact of a dual cure activator (DCA) when applied in combination with self-adhesive resin cements on the zirconia. Sixty zirconia were prepared in compliance with the manufacturer’s directions. The specimens were randomly assigned to each group under the dark [...] Read more.
This study examines the impact of a dual cure activator (DCA) when applied in combination with self-adhesive resin cements on the zirconia. Sixty zirconia were prepared in compliance with the manufacturer’s directions. The specimens were randomly assigned to each group under the dark condition, following DCA and self-adhesive resin cements [RelyX universal resin cement (RXS); Maxcem elite chroma (MAC); Panavia SA cement multi (PSM)]; group 1, RXS; group 2, MAC; group 3, PSM; group 4, DCA + RXS; group 5, DCA + MAC; and group 6, DCA + PSM. The resin composite was fixed to the zirconia, surface-treated, and maintained in a dark container for 30 min. The specimens were kept in an incubator at a temperature of 37 degrees Celsius for 24 h. The universal testing device was employed to compute the shear bond strength (SBS). A stereomicroscope was used to analyze the fractured types. The data were analyzed employing the one-way ANOVA and Tukey’s test. Group 2 had the lowest SBS (4.93 ± 0.53 MPa). Group 1 (11.17 ± 0.86 MPa) and group 3 (11.48 ± 1.17 MPa) were not significantly different in SBS. Group 6 (15.61 ± 0.68 MPa) had the highest SBS but was not significantly different from group 4 (15.45 ± 1.20 MPa). The findings show that treating the zirconia surface with DCA before using the self-curing mode of self-adhesive resin cements is the best way to improve the bond between the zirconia and resin cement. Full article
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15 pages, 1338 KiB  
Article
Survival of Chairside Posterior Single Crowns Made from InCoris TZI Zirconia—A Retrospective Analysis up to 10 Years
by Julius Jules Neuhöffer, Lea Stoilov, Norbert Enkling, Helmut Stark, Dominik Kraus and Milan Stoilov
Prosthesis 2024, 6(5), 1118-1132; https://doi.org/10.3390/prosthesis6050081 - 11 Sep 2024
Viewed by 1394
Abstract
Objective: The aim of the present study was to evaluate the long-term clinical survival and success of chairside-fabricated single-tooth monolithic zirconia restorations on posterior teeth using the speed sintering process. Materials and Methods: Between 2012 and 2022, 250 single-tooth crowns were fabricated for [...] Read more.
Objective: The aim of the present study was to evaluate the long-term clinical survival and success of chairside-fabricated single-tooth monolithic zirconia restorations on posterior teeth using the speed sintering process. Materials and Methods: Between 2012 and 2022, 250 single-tooth crowns were fabricated for 193 patients using the CEREC® chairside workflow. Restorations were fabricated from monolithic 3Y-TZP zirconia (InCoris TZI, Dentsply Sirona©, Bensheim, Germany) as full-contour crowns. The same clinician performed all procedures. Luting was performed using self-adhesive resin-based cements or glass ionomer cement. Retrospective analysis was conducted, defining survival as crowns still in function regardless of any interventions, and success as crowns that remained functional without the need for intervention. Statistical analysis was performed using Kaplan–Meier analysis, considering “refabrication” and “intervention” as endpoints. Results: Of the 250 crowns, a total of 162 (64.8%) crowns showed success. Over the whole observation period, 44 crowns (17.6%) required refabrication, and 88 (35.2%) required intervention. Mean survival without refabrication was 7.43 years, with a 5- and 7.5-year survival of 86.9% and 76.6%. The mean survival without intervention was 6.5 years, with a 5- and 7.5-year survival of 70.8% and 59.9%. Conclusions: Under appropriate technical conditions, chairside-fabricated 3Y-TZP zirconia single-tooth crowns represent a viable fabrication method. Neither the cementation mode nor the crown position—whether on premolars or molars—significantly impacted the survival rates. Full article
(This article belongs to the Special Issue Advancements in Zirconia Dental Restorations)
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10 pages, 4290 KiB  
Article
Influence of Preheating Self-Adhesive Cements on the Degree of Conversion, Cell Migration, and Cell Viability
by Henrique Cantarelli, Fernando Antonio Costa Xavier, Fernando Freitas Portella, Keiichi Hosaka, Eduardo Galia Reston, Louis Hardan, Rim Bourgi and Celso Afonso Klein-Junior
Appl. Mech. 2024, 5(3), 553-562; https://doi.org/10.3390/applmech5030031 - 20 Aug 2024
Cited by 1 | Viewed by 1446
Abstract
Enhancing the degree of polymerization can mitigate the cytotoxic effects of resinous materials, as residual monomers have been identified as a significant contributor to cytotoxicity. Hence, the aim of the current research was to evaluate the influence of preheating self-adhesive cements at 39 [...] Read more.
Enhancing the degree of polymerization can mitigate the cytotoxic effects of resinous materials, as residual monomers have been identified as a significant contributor to cytotoxicity. Hence, the aim of the current research was to evaluate the influence of preheating self-adhesive cements at 39 °C on cell migration, cytotoxicity, and degree of conversion. RelyX U200, Set PP, and MaxCem Elite were subjected to Fourier Transform Infrared Spectroscopy–Attenuated Total Reflection (FTIR–ATR). Self-adhesive resin cements were applied onto an ATR device, with samples subjected to either heated or room temperature conditions, followed by photoactivation. For the cytotoxicity analysis, extracts (24 h and 7 days) were placed in contact with NIH/3T3 cells. For cell migration, images were captured of each sample until the possible closure of the cleft occurred. A two-way analysis of variance (ANOVA) was conducted to assess the effect of preheating on the degree of conversion and cell viability within the self-adhesive cements tested. A significance level of 5% was set for statistical purposes. In the results of the degree of conversion, preheating did not improve the conversion of cements (p > 0.05). For the 3-(4-5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT), preheating did not improve the results within 24 h, however, it generated positive results within 7 days for the Set PP resin cement (p < 0.05). For cell migration, high rates of cell death were found in all groups. It is concluded that preheating at 39 °C causes a positive effect only in increasing the cell viability of the Set PP resin cement and that both materials analyzed are highly cytotoxic. Full article
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Article
Clinical Outcome of Prefabricated Zirconia Crowns Cemented with Self-Adhesive Resin and Pure Glass Ionomer on Primary Teeth: A Retrospective Cohort Study
by Murad Alrashdi and Atyaf Alhunti
Children 2024, 11(8), 991; https://doi.org/10.3390/children11080991 - 15 Aug 2024
Cited by 3 | Viewed by 1664
Abstract
Retentive strength data are critical to predicting the long-term clinical performance of zirconia crowns for primary teeth. Objectives: This research assessed the clinical outcome of prefabricated zirconia crowns (PZCs) cemented with either self-adhesive resin cement or pure glass ionomer cement in the [...] Read more.
Retentive strength data are critical to predicting the long-term clinical performance of zirconia crowns for primary teeth. Objectives: This research assessed the clinical outcome of prefabricated zirconia crowns (PZCs) cemented with either self-adhesive resin cement or pure glass ionomer cement in the primary teeth of children. Method: In the present research, a sample of 162 prefabricated zirconia crowns were collected through convenience sampling. A follow-up examination was conducted at 12 and 24 months to assess the clinical outcomes of PZCs post cementation. Results: Zirconia crowns cemented with self-adhesive resin showed high clinical outcomes at both 12 and 24 months, with 95.1% of crowns retained. In contrast, crowns cemented with glass ionomer cement had slightly lower clinical outcomes, with 91.4% retained at 12 months and 84.0% retained at 24 months, indicating a significant difference (p-value). Long-term follow-up is crucial for the optimal maintenance of crown stability. Conclusions: Self-adhesive resin cement is a viable option for cementing PZCs in pediatric dentistry, demonstrating satisfactory clinical performance over both 12 and 24 months. Future studies comparing different types of cement are recommended for further validation of these results. Full article
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