A Comparative Study Of Flexural Strength And Fatigue Resistance Of 2 Nanoceramic Composite Resin Cad/Cam Blocks (Lava Ultimate And Vita Enamic) And A Lithium Disilicate Glass Ceramic (Ips E.Max Cad)

Vafaee, Fariborz; Firooz, Farnaz; Heidari, Bijan; Khoshhal, Masoumeh; Allahbakhshi, Hanif

doi:10.13005/bpj/1080

Cited by 8 publications

(9 citation statements)

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“…Most of the data is provided by the manufacturers. However, we can find a significant discrepancy in the results, difficult to be explained only by the methodology differences [ 6 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 95%

Resin Composite Materials for Chairside CAD/CAM Restorations: A Comparison of Selected Mechanical Properties

Grzebieluch

Mikulewicz

Kaczmarek

2021

Journal of Healthcare Engineering

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Objective. The aim was to evaluate the flexural strength, flexural modulus, microhardness, Weibull modulus, and characteristic strength of six resin composite blocks (Grandio Blocs-GR, Tetric CAD-TE, Brilliant Crios-CR, Katana Avencia-AV, Cerasmart-CS, and Shofu Block HC-HC). Methods. Flexural strength and flexural modulus were measured using a three-point bending test and microhardness using the Vickers method. Weibull analysis was also performed. Results. The materials showed flexural strength ranging from 120.38 (HC) to 186.02 MPa (GR), flexural modulus from 8.26 (HC) to 16.95 GPa (GR), and microhardness from 70.85 (AV) to 140.43 (GR). Weibull modulus and characteristic strength ranged from 16.35 (CS) to 34.98 (TE) and from 123.45 MPa (HC) to 190.3 MPa (GR), respectively. Conclusions. GR, TE, and CR presented significantly higher flexural strength, modulus, Weibull modulus, and characteristic strength than the others.

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Section: Introductionmentioning

confidence: 95%

Resin Composite Materials for Chairside CAD/CAM Restorations: A Comparison of Selected Mechanical Properties

Grzebieluch

Mikulewicz

Kaczmarek

2021

Journal of Healthcare Engineering

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“…Hitherto, prostheses for first premolars have usually included a full-metal crown. Recently, however, the demand for prostheses with better esthetics has rapidly increased 7,8,11,29,34) , and much work is now being done on metal-free crowns for first premolars 6) .…”

Section: Discussionmentioning

confidence: 99%

Influence of Tooth Mold Materials in Composite Resin CAD/CAM Crown Destructive Test

Nomoto

Masuda

Satô

et al. 2021

Bull. Tokyo Dent. Coll.

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A range of experimental designs have been used in destructive testing of composite resin CAD/CAM crowns. Various materials have been adopted for the abutment in such tests, including human or bovine dentin, stainless steel, PMMA, and composite resin, the selection of which is made in accordance with study objective or preference of the researcher. The purpose of this study was to determine how the material selected for the abutment material affected fracture load and maximum displacement. Destructive tests were conducted on composite resin crowns of the same design. Three types of material were used for the abutments together with 2 types of adhesive material. Images of each sample were acquired before destruction using a microfocus X-ray CT scanner to confirm the feasibility of a non-destructive test.The load required to fracture the composite CAD/CAM resin crowns depended on the abutment material used, with a decrease being observed in the order of composite resin, stainless steel, and PMMA. Maximum displacement decreased in the order of PMMA, composite resin, and stainless steel. Differences in the material used for setting (adhesive resin or polycarboxylate cement) showed no effect on fracture load. These results indicate that the load required to achieve destruction of resin CAD/CAM crowns varies according to the abutment material used.

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“…Prior to insertion, certain surface modifications are carried out to correct occlusal interferences, contours, margins and to improve the aesthetic appearance and surface smoothness of ceramic restorations [ 3 ]. Occlusal adjustment by diamond rotary instruments causes removal of the smooth glazed surface layer and introduces surface flaws that act as focal points for crack propagation and also reduced flexural strength.…”

Section: Introductionmentioning

confidence: 99%

“…To solve these problems, direct finishing and polishing are done on the restoration surface intraorally, which produces a more uniform surface. Therefore, in order to improve the flexural strength and esthetics of the restoration, glazing or polishing is carried out after the adjustment procedure [ 2 , 3 ]. The purpose of this in vitro study was to assess the flexural strength between re-glazed and polished porcelain surfaces after abrasion.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of flexural strength of abraded and polished porcelain surfaces – an in vitro study

Nandagiri¹,

Praveen

Singh

et al. 2021

JMedLife

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Typically, prosthodontists adjust ceramic restorations glazed surface by grinding prior to insertion. Such alterations of surfaces are necessary for the correction of occlusal interferences. We aimed to evaluate and compare the change in flexural strength of ceramic surfaces after re-glazing and polishing. This study included 40 samples of ceramic blocks that were fabricated and glazed, and then fired in accordance with the manufacturer’s recommendations. The sample was randomly divided into four groups of 10 samples each. The first group was the control group with unaltered glazed samples. The second group was abraded with an extra-fine diamond bur followed by re-glazing, and the other two groups were polished with two commercially available polishing kits after abrading them with an extra-fine diamond bur. The samples were tested for their flexural strength using a universal testing machine. On the application of the F test on the means of all the groups, a value greater than 0.05 was found, which meant that there is no statistically significant difference in flexural strength values between the groups (P-value>0.05). Since the flexural strength values of the polished group were comparable to the other groups, polishing can be used instead of re-glazing for ceramic restorations. This reduces an additional clinical appointment for the patient and saves working time.

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A Comparative Study Of Flexural Strength And Fatigue Resistance Of 2 Nanoceramic Composite Resin Cad/Cam Blocks (Lava Ultimate And Vita Enamic) And A Lithium Disilicate Glass Ceramic (Ips E.Max Cad)

Cited by 8 publications

References 0 publications

Resin Composite Materials for Chairside CAD/CAM Restorations: A Comparison of Selected Mechanical Properties

Resin Composite Materials for Chairside CAD/CAM Restorations: A Comparison of Selected Mechanical Properties

Influence of Tooth Mold Materials in Composite Resin CAD/CAM Crown Destructive Test

Comparative analysis of flexural strength of abraded and polished porcelain surfaces – an in vitro study

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