Effect of Surface Acid Etching on the Biaxial Flexural Strength of Two Hot‐Pressed Glass Ceramics

Hooshmand, Tabassom; Parvizi, Shaghayegh; Keshvad, Alireza

doi:10.1111/j.1532-849x.2008.00319.x

Cited by 90 publications

(65 citation statements)

References 29 publications

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“…However, when contemplating the results of lithium disilicate, contradictory findings become apparent: Borges et al 6) described statistically greater fracture loads for lithium disilicate specimens when cemented with composite resin cement in comparison to those cemented with resin-modified glass-ionomer cement. Yet, the product tested was IPS Empress 2 with a lower flexural strength of 251 MPa 14) in contrast to IPS e.max CAD which was examined in the present study and has a flexural strength of 360 MPa 10) . In this study, only the leucite reinforced glass-ceramic showed an influence of cementation type on the fracture load results.…”

Section: Discussionmentioning

confidence: 73%

“…However, both materials offer the possibility of conventional cementation. Glass-ceramics exhibit lower strength values and require an adhesive luting protocol to increase the mechanical strength of a restoration [11][12][13][14] . Fracture load studies reported significantly higher fracture load results for glass-ceramic crowns after adhesive bonding with multistep bonded luting resin composites versus conventionally cemented crowns 15) .…”

Section: Introductionmentioning

confidence: 99%

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Influence of cementation and cement type on the fracture load testing methodology of anterior crowns made of different materials

et al. 2013

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To evaluate the influence of cementation on fracture load of anterior crowns made of CAD/CAM-resin-blocks (ART), leucite-reinforced glass-ceramics (LRG), lithium disilicate ceramics (LIT), veneered zirconia (ZRO) and veneered alloy (DEG). Each crown group (n=15/ subgroup) was cemented on the metal abutment as follows: i. using glass ionomer, ii. using self-adhesive resin cement, and iii. not cemented. Crowns were tested and analyzed with 2-way and 1-way ANOVA (Scheffé test), and Weibull statistics (p<0.05). Within LRG, self-adhesive cemented subgroup showed higher fracture load compared to other groups (p<0.001). Among DEG, lower results were measured for non-cemented crowns than for cemented (p<0.001). For ART, LIT and ZRO no influence of cementation was observed. For fracture load test methodology, metal ceramic crowns should be generally cemented. Glass-ceramic crowns should be cemented using adhesive cement. Cementation and cement type did not have an influence on the fracture load results for resin, zirconia or lithium disilicate crowns.

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Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Influence of cementation and cement type on the fracture load testing methodology of anterior crowns made of different materials

et al. 2013

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“…Furthermore, it was reported that polymeric CAD/CAM resins exhibited similar color stability to glass-ceramic. 5 The mechanical properties, such as flexural strength of glass-ceramic, 6 are comparable to resins, 7 but the hardness values of glass-ceramic 8 are higher than those of resins. 7 An advantage of all resin-based materials is their plastic deformability, which could prevent the spontaneous fracture of the restoration.…”

Section: Introductionmentioning

confidence: 96%

Two-body wear rate of CAD/CAM resin blocks and their enamel antagonists

Stawarczyk

Özcan

Trottmann

et al. 2013

The Journal of Prosthetic Dentistry

102

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STATEMENT OF PROBLEM: Computer-aided design and computer-aided manufacturing (CAD/CAM) resins exhibit good mechanical properties and can be used as long-term restorations. The wear rate of such resins and their enamel antagonists is unknown. PURPOSE: The purpose of this study was to test and compare the 2-body wear rate of CAD/CAM resin blocks. MATERIAL AND METHODS: Wear specimens (N=42, n=6) were made from 5 CAD/CAM resins: ZENO PMMA (ZP), artBloc Temp (AT), Telio CAD (TC), Blanc High-class (HC), CAD-Temp (CT); 1 manually polymerized resin: Integral esthetic press (negative control group, IEP); and 1 glass-ceramic: VITA Mark II (positive control group, VM2). The specimens for the wear resistance were aged in a thermomechanical loading machine (49 N, 1.67 Hz, 5/50°C) with human enamel antagonists. The material loss of all specimens before, during, and after aging was evaluated with a 3DS profilometer. The measured material loss data of all tested groups were statistically evaluated with linear mixed model analysis (a=.05). RESULTS: Manually polymerized resin showed significantly higher material wear (P<.001) than all other tested groups. Glass-ceramic showed significantly lower wear values (P<.001) than CAD/CAM resins ZP, AT, HC, CT, and IES. CAD/CAM resin TC was not significantly different from the positive control group. Glass-ceramic showed the highest enamel wear values (P<.001) of all tested resins. No differences were found in the enamel wear among all resins. The glass-ceramic group showed damage in the form of cracks on the worn enamel surface in 50% of specimens. CONCLUSIONS: CAD/CAM resins showed lower wear rates than those conventionally polymerized. Only one CAD/CAM resin, TC, presented material wear values comparable with glass-ceramic. The tested glass-ceramic developed cracks in the enamel antagonist and showed the highest enamel wear values of all other tested groups. DOI: https://doi.org/10.1016/S0022-3913 (13) Purpose. This study tested and compared the 2-body wear rate of CAD/CAM resin blocks. CAD/CAM resins with lower wear than conventionally polymerized resins may be an appropriate choice for long-term use because they showed lower wear on enamel antagonists than glass-ceramic. Material

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“…These findings are in contrast with some previous studies were the aged groups did not differ from the non-aged group in bond strength. [17] The explanation for this difference may lie in the aging period, varying between 1h and 5,000 cycles vs. 20,000 cycles in the present work.…”

Section: Discussionmentioning

confidence: 63%

Optimization of Heat-Dried Silane Application for CAD/CAM Ceramic Resin Bonding

Pinto

Magne

Bruzi

et al. 2018

Nanosci Nanotechnol

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Abstract:Aim:Evaluate surface treatments and silane application methods and their effect on shear bond strength (SBS) before and after aging. Materials and methods. Slices of IPS e.max CAD and Vitablocs Mark II, were embedded in acrylic resin. The block was randomly assigned to 5 groups; E:etching with hydrofluoric acid (HF), rinsing, followed by cleaning in ultrasonic bath; E/S:HFetching and cleaned as group E followed by silane application for 20s, air drying and hot drying; E/S+:HFetching and cleaned as group E, followed by silane application for 60s, air drying and hot air drying, rinsing with boiling water and hot air drying; S:silane application for 20s followed by air drying and hot air drying; S+:silane application for 60s followed by air drying, air drying and hot air drying, rinsing in boiling water and hot drying. Cylinders of composite resin (n=12) were bonded with adhesive. SBS testing was carried out after 24h or after thermocycling for groups E; E/S and E/S+. Results. For 24h SBS showed sign

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Effect of Surface Acid Etching on the Biaxial Flexural Strength of Two Hot‐Pressed Glass Ceramics

Abstract: From the results, it was concluded that surface HF acid etching could have a weakening effect on hot-pressed leucite or lithia disilicate-based glass ceramic systems.

Cited by 90 publications

References 29 publications

Influence of cementation and cement type on the fracture load testing methodology of anterior crowns made of different materials

Influence of cementation and cement type on the fracture load testing methodology of anterior crowns made of different materials

Two-body wear rate of CAD/CAM resin blocks and their enamel antagonists

Optimization of Heat-Dried Silane Application for CAD/CAM Ceramic Resin Bonding

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