In Vitro Analysis of the Fracture Resistance of Cad-Cam Cerasmart Molar Crowns with Different Occlusal Thickness

Sorrentino, Roberto

doi:10.26717/bjstr.2018.03.000860

Cited by 3 publications

(3 citation statements)

References 23 publications

(36 reference statements)

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“…The sample size (n=20) was selected based on the study of Sorrentino et al, who tested the fracture resistance of Cerasmart ™ full -contour crowns (predecessor of Cerasmart270 ™ ), using a sample of ten specimens per experimental group. 20 The statistical power of the present study was 93%, with a significance level of 0.05.…”

Section: Methodsmentioning

confidence: 71%

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Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

Guerreiro¹,

Dias²,

Carracho³

2021

j.rpemd

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Objective: To evaluate the influence of the type of cement on the fracture resistance of full-contour resin nanoceramic crowns cemented over preparations with knife-edge margins. Methods: A right lower premolar typodont model was prepared with a 1.5-mm axial reduction, a 2.0-mm occlusal reduction, and a knife-edge vertical margin. An anatomical crown was designed from the digital scanning of the preparation using CAD/CAM software. Then, 20 crowns were milled from resin nanoceramic CAD/CAM blocks (Cerasmart270™) as well as a replica of the dental preparation in a cobalt-chrome alloy. The 20 crowns were randomly divided into two groups. Group 1 crowns were cemented with self-adhesive resin cement (G-CEM LinkAce™) and group 2 crowns with resin-modified glass ionomer cement (FujiCEM™ 2). Subsequently, they were subjected to a loading test on an Instron universal testing machine until fracture occurred. The data were statistically analyzed using the parametric Student’s t-test (α=0.05). Results: The type of cement was shown to have a statistically significant effect on the crowns’ fracture resistance (p <0.001). Group 1 presented a mean of 1284.3±340.19 Newtons, much higher than the mean recorded in group 2, of 417.9±106.35 Newtons, with an increase of 207.3% in the fracture resistance after self-adhesive luting. Conclusions: Resin nanoceramic crowns cemented with self-adhesive resin cement showed considerably higher fracture resistance than those cemented with resin-modified glass ionomer cement.

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Section: Methodsmentioning

confidence: 71%

“…25,26 Furthermore, studies with similar methodology also had standard deviations similar to the ones of the present study. 15,16,20,23 Thus, there is no clear evidence that the standardization was reduced.…”

Section: Discussionmentioning

confidence: 99%

Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

Guerreiro¹,

Dias²,

Carracho³

2021

j.rpemd

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“…3D Finite Element Analysis. Higher values were found in graphene-based bridges than in zirconia-based bridges, and in the three-unit bridge compared to the corresponding four-unit bridge, while stress concentration was at the point of loading and at the connector areas [23].…”

Section: Introductionmentioning

confidence: 82%

In-Vitro Comparative Study of Compressive Strength in CAD/CAM Dental Materials

Berar,

Dudescu,

Carbonel

et al. 2023

Preprint

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(1) Background: The study aimed to investigate compressive strength for three computer-aided design/computer-aided manufacturing (CAD/CAM) dental materials: glassceramic IPS Empress CAD (IvoclarVivadent), hybrid ceramic Cerasmart (GC) and polymer-reinforced graphene G-CAM (Graphenano Dental). (2) Methods: 45 samples consisted of the molar crowns fabricated by three CAD/CAM materials were cemented adhesively on 3D printed abutments (Asiga DentalResin). The samples were divided into 3 groups (n=15) according to the crowns thickness; group 1 under the cusps/cervical margins - 0.6 mm/0.4 mm, group 2 - 1 mm/0.7 mm respectively, and group 3 - 1.5 mm/1 mm. Additionally, 20 cylindrical specimens fabricated by the three crowns and abutments material (n=5) were prepared by CAD/CAM technique. All samples and specimens were subjected to an axial compressive load by using a universal testing machine (Instron 3366-10kN, USA) until fracture. (3) Results: The compressive strength were for Empress CAD 1258 MPa, Cerasmart 501.3 MPa, G-CAM 435 MPa and Asiga resin 360 MPa. G-CAM crowns exhibited a higher maximum compressive load (1701.5-2011.8N) than both Cerasmart (1295.4-1642.9N) and Empress CAD (494.3-597.5N). (4) Conclusions: The CAD/CAM crown materials presented different mechanical behavior; Empress CAD and Cerasmart presented a fragile behavior, with a high compressive strength when compared to G-CAM and Asiga resins.

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Marginal adaptation and fracture resistance of milled and 3D-printed CAD/CAM hybrid dental crown materials with various occlusal thicknesses

Suksuphan,

Krajangta,

Didron

et al. 2023

J Prosthodont Res

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Digital technologies have become pervasive across various stages of the dental workflow [1] owing to improvements in computer-aided design/computer-assisted manufacturing (CAD/CAM). Currently, CAD/CAM technology is used to manufacture several restorations with excellent esthetic properties. The advantages of the CAD/CAM generation technique include access to industrially prefabricated and almost-defect-free dental restorations, improvement in precision and planning, higher reproducibility, automatic and high-speed data processing, and simpler and efficient data stor-age [1]. The current CAD/CAM techniques encompass both subtractive milling and additive manufacturing, commonly referred to as three-dimensional (3D) printing [2]. Compared to subtractive milling, additive manufacturing offers several benefits such as reduced material waste and the capability to produce complex shapes including undercuts or inaccessible areas that cannot be milled [3]. Recently, new hybrid materials have been developed for CAD/CAM systems that combine the advantages of ceramics in terms of esthetic characteristics, durability, and color stability with the advantages of resin composites, such as high flexural strength, low abrasiveness, and intraoral reparability. Currently, most hybrid ceramics used as restorative materials can be milled using subtractive milling [4]. Two examples of the hybrid materials are Cerasmart ® (CE) and Vita Enamic ® (VE). Cerasmart ® is a high-density resin composite material containing 71% filler particles (by weight), referred to as a "flexible nanoceramic" [5]. VE or polymer-infiltrated ceramic network (PICN) materials consist of an 86% (by weight) porous feldspathic ceramic matrix infiltrated with a copolymer (urethane dimethacrylate and J Prosthodont Res. 2023; **(**):

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In Vitro Analysis of the Fracture Resistance of Cad-Cam Cerasmart Molar Crowns with Different Occlusal Thickness

Cited by 3 publications

References 23 publications

Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

In-Vitro Comparative Study of Compressive Strength in CAD/CAM Dental Materials

Marginal adaptation and fracture resistance of milled and 3D-printed CAD/CAM hybrid dental crown materials with various occlusal thicknesses

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