Influence of restoration thickness and dental bonding surface on the fracture resistance of full-coverage occlusal veneers made from lithium disilicate ceramic

Sasse, Martin; Krummel, Anna; Klosa, Karsten; Kern, Matthias

doi:10.1016/j.dental.2015.04.017

Cited by 123 publications

(158 citation statements)

References 32 publications

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“…Such difference is possibly attributed to the different tooth type. On the other hand, a recent work on LDG occlusal veneers considering different molar tooth preparations showed a wide range of fracture loads among the considered experimental groups (median value 610 N‐3390 N), which were slightly below or greatly above the recommended minimum fracture strength for posterior restorations of 500 N‐700 N . The authors obtained the best results with 0.7 to 1.0 mm‐thick restoration in terms of the survival rate after dynamic loading and fracture resistance regardless of the bonding substrate (only enamel or enamel and dentin), whereas the performance of thinner restorations depended on the bonding surface, with 0.3 to 0.6 mm‐thick restorations bonded only to enamel showing the worst results .…”

Section: Discussionmentioning

confidence: 90%

“…When restoring a tooth one should consider not only the restorative materials that best emulates enamel and dentin, but also the simulation of the dentin‐enamel junction through the restoration‐dentin bond, which can be considered a true composite structure. Using extremely thin “enamel‐like” restorations, the bonding strategy becomes yet more important …”

Section: Discussionmentioning

confidence: 99%

“…Ideally, the preparation surface of a tooth receiving an all‐ceramic restoration should have no sharp angles and be rounded as much as possible . Nonretentive full‐coverage occlusal veneers are becoming a popular treatment option to restore the shape and anatomy of posterior teeth affected by occlusal wear and/or advanced erosive lesions . Minimally invasive designs or the “no‐preparation” approach have been advocated for teeth where a significant amount of dental tissue has already been lost by wear and erosion, because further tooth preparation may be counterproductive in these cases .…”

Section: Introductionmentioning

confidence: 99%

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Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Angerame

Biasi

Agostinetto³

et al. 2019

J Esthet Restor Dent

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Objectives To evaluate the fracture resistance and marginal quality of maxillary molars restored using lithium disilicate glass‐ceramic (LDG) occlusal veneers with two preparation designs. Methods Sixteen extracted maxillary molars were assigned to two groups (n = 8). In group 1 (G1), the teeth received a preparation for a conservative full‐coverage occlusal veneer restoration with a 90° rounded shoulder margin. In group 2 (G2), the teeth underwent a 1‐mm cusp reduction with a marginal chamfer. LDG restorations (IPS e.max CAD) were obtained with the Cerec 3 CAD/CAM system and luted with Variolink II cement. After thermomechanical aging (1 250 000 cycles), the specimens were loaded to fracture. A semiquantitative marginal seal evaluation was performed observing resin replicas of the specimens at the scanning electron microscope. Cement thickness was assessed at the stereomicroscope on sectioned specimens. Collected data were statistically analyzed by parametric and nonparametric tests. Results The maximum load to fracture was 2395.01 ± 150.96 N in G1 and 2408.39 ± 112.66 N in G2. Most of the observed specimens exhibited restorable fractures and continuous margins. Cement thickness was 132 ± 38 μm in G1 and 150 ± 41 μm in G2. No differences between the groups emerged. Conclusion This study demonstrated similar satisfactory performance of the two considered preparations designs for occlusal veneer with LDG. Clinical Significance A new minimally invasive occlusal veneer preparation with marginal chamfer exhibited promising fracture resistance and marginal adaptation that were comparable to those of a standard conservative preparation for the restoration of molars with CAD/CAM lithium disilicate occlusal veneers.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of preparation designs on marginal adaptation and failure load of full‐coverage occlusal veneers after thermomechanical aging simulation

Angerame

Biasi

Agostinetto³

et al. 2019

J Esthet Restor Dent

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“…The authors reported high survival rates with both types of restorations, recommending them for a minimally aggressive treatment of extended lesions in posterior teeth. In a recent in vitro research, Sasse et al [70] advised the need of a lithium disilicate minimum thickness of 0.7–1.0 mm when nonretentive, full-coverage adhesively retained occlusal veneers are used. As regards 3-unit FDPs, according to the manufacturer's recommendations, the use of lithium disilicate should be limited to the replacement of anterior teeth or premolars.…”

Section: Clinical Indications and Outcomesmentioning

confidence: 99%

“Digitally Oriented Materials”: Focus on Lithium Disilicate Ceramics

Zarone

Ferrari

Mangano³

et al. 2016

International Journal of Dentistry

117

115

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The present paper was aimed at reporting the state of the art about lithium disilicate ceramics. The physical, mechanical, and optical properties of this material were reviewed as well as the manufacturing processes, the results of in vitro and in vivo investigations related to survival and success rates over time, and hints for the clinical indications in the light of the latest literature data. Due to excellent optical properties, high mechanical resistance, restorative versatility, and different manufacturing techniques, lithium disilicate can be considered to date one of the most promising dental materials in Digital Dentistry.

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“…Over the last 20 years, ceramic restorations have become very popular and routinely used in clinical practice. This is further driven by the significant developments that have improved the mechanical and optical properties of ceramic materials available for dental restorations . In addition, the development of modern manufacturing techniques has reduced the risk of internal flaw development within the ceramic material, which can further enhance its performance .…”

Section: Introductionmentioning

confidence: 99%