Curing mode affects bond strength of adhesively luted composite CAD/CAM restorations to dentin

Lührs, Anne‐Katrin; Pongprueksa, Pong; Munck, Jan De; Geurtsen, Werner; Meerbeek, Bart Van

doi:10.1016/j.dental.2013.11.016

Cited by 83 publications

(78 citation statements)

References 32 publications

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“…Light activation is important as well as the amount irradiant energy that reaches the resin cement in order to obtain high DC, since poor polymerization affects the quality of cementing procedure (14,15,20,21). The methodology to obtain the DC values used in this study may increase the self-cure mode effects, because selfadhesive resin-based luting agents contain acidic functional methacrylates.…”

Section: Discussionmentioning

confidence: 99%

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Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement

et al. 2015

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This study evaluated the effects of indirect restorative materials, curing conditions and time on the degree of conversion (DC) of a dual-cured resin cement using infrared spectroscopy. The resin cement (RelyX Unicem 2, 3M ESPE) was applied to the diamond surface of a horizontal attenuated-total-reflectance unit and activated using one of following conditions: self-cure, direct light exposure, light exposure through indirect restorative materials (resin nano-ceramic: Lava Ultimate, 3M ESPE or feldspathic ceramic: Vita Blocks Mark II, Vita Zahnfabrik). Four thicknesses (0.5, 1.0, 1.5 or 2.0 mm) of each indirect material were analyzed, and the light-activation was performed using a blue LED light. Data (n=5) were analyzed by three-way ANOVA, Tukey's post hoc and Dunnett's tests (a=5%). No significant differences in DC were observed between indirect materials of similar thickness. All groups exhibited higher DC after 10 min than after 5 min. At both times points, the self-cure group exhibited significantly lower DC than all the light exposure groups. Only when the overlying indirect restoration had a thickness of 2 mm did DC decrease significantly. The presence of a thick, indirect restoration can decrease the DC of resin cement. DC after 10 min was higher than after 5 min. The self-cure mode yielded lower DC than the light-activating one.

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Section: Discussionmentioning

confidence: 99%

“…Thus, the use of millable materials for CAD-CAM increases the interest of dentists and clinical instructors to have more information about the light passing through these types of indirect esthetic restorations and their influence on the DC of resin cements (14,15).…”

Section: Introductionmentioning

confidence: 99%

Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement

et al. 2015

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“…Resin composite block materials may offer significant advantages that are related to their manufacturability, machinability, and reparability 7) , while most of the metal-free materials require firm bonding to the teeth because of their brittleness 9) . Several factors that affect the bonding of metal-free CAD/CAM restorations have been investigated: various ceramic surface treatments on the shear-bond strengths of resin-luting agents to ceramic material discs 10) ; curing mode, and surface pretreatment of the CAD/CAM composite block-surface on the microtensile bond strength (μ-TBS) to dentin 11) ; and different adhesive strategies on the μ-TBS of CAD/ CAM blocks to dentin 10,12) . The IDS has been extensively examined and the technique helps to ensure robust bond strength 13,14) , fewer gap formations 15) , minimal bacterial leakage, and sensitivity limited to the post-operative period 16) .…”

Section: Introductionmentioning

confidence: 99%

Bonding state of metal-free CAD/CAM onlay restoration after cyclic loading with and without immediate dentin sealing

Ishii

Maseki

Nara

2017

Dental Materials Journal

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To examine the bonding state of metal-free CAD/CAM onlay restorations made from two popular resin composite blocks and a typical glass-ceramic block after cyclic loading, with and without immediate dentin sealing (IDS). Standardized mesial-distal-occlusalbuccal (MODB) cavities in 24 extracted human molars were prepared. The intra-cavity dentin surfaces of half of the cavities were immediately sealed with all-in-one adhesive and flowable composite, while those of the other half were not. All cavities were scanned, from which CAD/CAM onlays were fabricated from three types of block and cemented with an adhesive resin cement system. The restored specimens were subjected to cyclic loading and the intra-cavity microtensile bond strength was measured. IDS improves not only the internal bond strength, but also the bond reliability of metal-free CAD/CAM onlay restorations. The resin composite block seems to be more effective than a typical glass-ceramic block for achieving both high bond strength and excellent bond reliability.

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“…For the bond strength of an experimental CAD/CAM nanocomposite to dentin abutments, it was found that both the composite resin cement and coupling agent have an influence on the bond strength [20]. In addition, the curing mode is decisive for the bonding effectiveness of adhesively luted polymeric CAD/CAM restorations to dentin [21]. …”

Section: Introductionmentioning

confidence: 99%

Retention Strength of PMMA/UDMA-Based Crowns Bonded to Dentin: Impact of Different Coupling Agents for Pretreatment

et al. 2015

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Computer aided design/computer aided manufacturing (CAD/CAM) polymers for long-term dental restorations benefit from enhanced mechanical properties. However, the quantification of their bonding properties on teeth is lacking. Therefore, the aim of this study was to determine the retention strength (RS) of differently pretreated new developed polymethylmethacrylate/urethanedimethacrylate-based CAD/CAM polymer bonded on dentin. In summary, 120 human caries-free molars were prepared, and polymeric crowns were milled and pretreated (n = 20): visio.link (VL), Scotchbond Universal (SU), Monobond Plus/Heliobond (MH), Margin Bond (MB), Margin Bond mixed with acetone (1:1) (MBA) or not pretreated (CG). Half of the specimens were cemented using Variolink II and the other half with RelyX Ultimate. Specimens were stored for 24 h in distilled water and thermal cycled (5000 ×, 5 °C/55 °C). The retention load was measured and failure types were defined. RS was calculated and analyzed using both two- and one-way ANOVA with a post-hoc Scheffé-test, unpaired t-test, Kaplan–Meier with Breslow–Gehan test and chi-squared test (p < 0.05). Crowns bonded using RelyX Ultimate showed higher RS than those bonded using Variolink II. The pretreatment showed no impact on the RS. However, survival analysis within Variolink II found an impact of pretreatment. The median RS for MH was the lowest and statistically different from MB, MBA and CG. For Variolink II MH had the poorest survival as the estimated cumulative failure function of the debonded crown increased very quickly with increasing TBS. Within the RelyX Ultimate groups, no significant differences were determined. The newly developed CAD/CAM polymer showed the highest bonding properties after cementation using RelyX Ultimate.

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Curing mode affects bond strength of adhesively luted composite CAD/CAM restorations to dentin

Cited by 83 publications

References 32 publications

Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement

Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement

Bonding state of metal-free CAD/CAM onlay restoration after cyclic loading with and without immediate dentin sealing

Retention Strength of PMMA/UDMA-Based Crowns Bonded to Dentin: Impact of Different Coupling Agents for Pretreatment

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