Mechanical performance of monolithic materials cemented to a dentin-like substrate

Weitzel, Isabela Sandim Souza Leite; Rangel, João Henrique Rodrigues; Perim, M.P.; Melo, Renata Marques de; Borges, Alexandre Luiz Souto; Silva-Concílio, Laís Regiane; Amaral, Marina

doi:10.1016/j.prosdent.2019.12.021

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Interestingly, DD cubeX 2 and VITA Enamic exhibited the highest strength values, whereas IPS e.max CAD and VITA Suprinity had the lowest. Our results differ from those obtained by some studies where VITA Suprinity showed the highest strength values, followed by IPS e.max CAD and VITA Enamic; however, this can be attributed to the different sample preparation, ageing, and loading methods used [4,6,24,29]. VITA Enamic is characterised by a secondary polymerised monomer infiltrated with a pre-sintered glass-ceramic, resulting in a true skeleton structure that facilitates effective stress distribution in all directions.…”

Section: Discussioncontrasting

confidence: 99%

“…This inconsistency was also observed in studies examining the biaxial flexural strength of bonded monolithic CAD/CAM restorative materials [4,6,27,28]. On the other hand, consistent results were obtained by comparative studies of the biaxial flexural strength of IPS e.max CAD and that of VITA Enamic, with the latter system exhibiting lower strength than the former system whether it was bonded to dentin analogues or left unbonded [4,9,24,26,29]. More studies on monolithic CAD/CAM restorative materials are clearly needed.…”

Section: Introductionmentioning

confidence: 86%

“…However, the B3B test was specifically developed to overcome some disadvantages of conventional biaxial flexural tests, allowing for the slight warping of the sample surface without negatively affecting the mathematical calculations [21]. It is common practice for studies conducting flexural strength testing of CAD/CAM materials to prepare these materials into crowns, onlays, veneers, or disk-shaped specimens and then subject them to flexural stresses after cementing them to dentin analogues or natural teeth, although other studies forego cementation [4,6,9,[24][25][26][27][28][29]. Sen and Us investigated the biaxial flexural strength of unbonded monolithic CAD/CAM restorative materials and found that VITA Suprinity exhibited the highest biaxial flexural strength, followed by IPS e.max CAD and VITA Enamic [9].…”

Section: Introductionmentioning

confidence: 99%

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Ball-on-Three-Balls Biaxial Flexural Strength of Bonded and Unbonded Cad/Cam Materials

Shono¹

2022

Ceramics - Silikaty

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This study aims to compare the biaxial flexural strength of four bonded and unbonded monolithic CAD/CAM restorative materials. Twenty disk-shaped specimens (10 mm in diameter and 2 mm in thickness) were fabricated from four CAD/CAM materials (N = 80): IPS e.max CAD, VITA Suprinity, VITA Enamic, and DD cubeX 2 . The bonded and unbonded disks were subjected to biaxial flexural stress using a universal testing machine, followed by fractographic and scanning electron microscopic analysis of the fractured samples. In the unbonded group, a significant difference in the biaxial flexural strength was observed (P < .

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Ball-on-Three-Balls Biaxial Flexural Strength of Bonded and Unbonded Cad/Cam Materials

Shono¹

2022

Ceramics - Silikaty

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“…An in vitro study reported that a feldspathic ceramic had the best fatigue behavior when cemented to a dentin‐like substrate in comparison to lithium disilicate, polymer infiltrated ceramic and a nanohybrid composite resin (Weitzel et al, 2020 ). Also, they reported that a complete ceramic crown could result in a different stress scenario and may lead to different results from those that they obtained in their study (44 MPa).…”

Section: Discussionmentioning

confidence: 99%

Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load

Borges

Lima

Özcan

2021

Clinical & Exp Dental Res

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Objectives: This study evaluated the effect of restoration occlusal design on the maximum fracture load and stress distribution of a feldspathic ceramic crown.Materials and Methods: Twenty dentin analogues were used to simulate a full-crown preparation. Next, 20 feldspathic crowns were milled according to the occlusal design parameter available in the CAD database (Young or Adult). The crowns were cemented with dual cure resin-cement and loaded until fracture at 1 mm/min crosshead speed. Data were analyzed by using one-way ANOVA and Tukey tests (p < 0.05). The same geometry and experimental setup was modeled and exported to the computer aided engineering software and tensile stress concentration was calculated using the finite element method with 300 N occlusal load simulation. Results:The occlusal anatomy significantly influenced the load-to-fracture (p < 0.05).Adult design showed higher mean values (1149 ± 201 N) than Young design (454 ± 77 N). The maximum principal stress criteria showed similar stress pattern for both designs, however, the highest stress concentration was calculated for Young design (91 MPa) in the occlusal surface.Conclusions: An anatomy design with reduced cusp angulation and less evident occlusal sulcus can reduce the stress concentration and increase the fracture load for feldspathic CAD/CAM posterior crowns.

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“…Despite the many advantages of monolithic ceramic crowns, they still have limitations such as fragility and surface machining and ease of repairing. 1,2 Numerical simulation is a strong tool for predicting the fracture pattern of engineered materials and analyzing their damage behavior. [3][4][5][6] Smooth particle hydrodynamics (SPH) is one of the most robust computational methods employed to simulate solid mechanics 7 and fluid flows developed by Gingold, Monaghan.…”

Section: Introductionmentioning

confidence: 99%

Crack growth pattern analysis of monolithic glass ceramic on a titanium abutment for single crown implant restorations using smooth particle hydrodynamics algorithm

Kashfi

Fakhri

Ghavamian³

et al. 2021

J Adv Periodontol Implant Dent

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Background. Glass ceramic materials have multiple applications in various prosthetic fields. Despite the many advantages of these materials, they still have limitations such as fragility and surface machining and ease of repairing. Crack propagation has been a typical concern in fullceramic crowns, for which many successful numerical simulations have been carried out using the extended finite element method (XFEM). However, XFEM cannot correctly predict a primary crack growth direction under dynamic loading on the implant crown. Methods. In this work, the dental implant crown and abutment were modeled in CATIA V5R19 software using a CT-scan technique based on the human first molar. The crown was approximated with 39514 spherical particles to reach a reasonable convergence in the results. In the present work, glass ceramic was considered the crown material on a titanium abutment. The simulation was performed for an impactor with an initial velocity of 25 m/s in the implant-abutment axis direction. We took advantage of smooth particle hydrodynamics (SPH) such that the burden of defining a primary crack growth direction was suppressed. Results. The simulation results demonstrated that the micro-crack onset due to the impact wave in the ceramic crown first began from the crown incisal edge and then extended to the margin due to increased stress concentration near the contact region. At 23.36 µs, the crack growth was observed in two different directions based on the crown geometry, and at the end of the simulation, some micro-cracks were also initiated from the crown margin. Moreover, the results showed that the SPH algorithm could be considered an alternative robust tool to predict crack propagation in brittle materials, particularly for the implant crown under dynamic loading. Conclusion. The main achievement of the present study was that the SPH algorithm is a helpful tool to predict the crack growth pattern in brittle materials, especially for ceramic crowns under dynamic loading. The predicted crack direction showed that the initial crack was divided into two branches after its impact, leading to the crown fracture. The micro-crack initiated from the crown incisal edge and then extended to the crown margin due to the stress concentration near the contact area.

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Mechanical performance of monolithic materials cemented to a dentin-like substrate

Cited by 4 publications

References 25 publications

Ball-on-Three-Balls Biaxial Flexural Strength of Bonded and Unbonded Cad/Cam Materials

Ball-on-Three-Balls Biaxial Flexural Strength of Bonded and Unbonded Cad/Cam Materials

Effect of occlusal anatomy of CAD/CAM feldspathic posterior crowns in the stress concentration and fracture load

Crack growth pattern analysis of monolithic glass ceramic on a titanium abutment for single crown implant restorations using smooth particle hydrodynamics algorithm

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