Y-TZP ceramic processing from coprecipitated powders: A comparative study with three commercial dental ceramics

Lazar, Dolores Ribeiro Ricci; Bottino, Marco C.; Özcan, Mutlu; Valandro, Luiz Felipe; Amaral, Rodrigo de Souza; Ussui, Valter; Bressiani, Ana Helena A.

doi:10.1016/j.dental.2008.04.002

Cited by 77 publications

(65 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1,9,15,19,25,[32][33][34][35] The weak adhesion noted for these conditions may also be attributed to poor chemical and micromechanical bonding. 5,7,34 With regard to the conditioning methods performed on the zirconia surfaces, several in vitro studies have shown that, not only cleaning, but also airborne-particle abrasion, is an essential step for achieving a durable bond to high-strength ceramics. 9,15,23 In the current study, the silica coating showed higher bond strengths when compared to cleaning with 96% isopropanol.…”

Section: Discussionmentioning

confidence: 99%

Adhesive Quality of Self-adhesive and Conventional Adhesive Resin Cement to Y-TZP Ceramic Before and After Aging Conditions

Passos¹,

May²,

Barca³

et al. 2010

Operative Dentistry

View full text Add to dashboard Cite

Clinical RelevanceChairside tribochemical silica coating and silanization on the YTZP surface appears to be essential to adhere this substrate to resin cements. Cleaning with isopropanol promotes weak and unstable resin adhesion. Conditioned ceramics were divided into four groups to receive the resin cements (Panavia F 2.0, Variolink II, RelyX U100 and Maxcem). After 24 hours, half of the specimens (n=12) from each group were submitted to shear bond strength testing (0.5 mm/minute). The remaining specimens were tested after 90 days of water storage at 37°C and thermocycling (12,000x, 5°C-55°C). Failure types were then assessed. The data were analyzed using three-way ANOVA and the Tukey's test (α α=0.05). Results: Significant effects of ceramic conditioning, cement type and storage conditions were observed (p<0.0001). The groups cleaned using alcohol only showed low bond strength values in dry conditions and the bond strength was reduced dramatically after aging. Groups conditioned using silica coating and silanization showed higher bond strengths both in dry and aged conditions. A high number of specimens failed prematurely prior to testing when they were cleaned using 96% isopropanol. Conclusion: Overall, silica coating and silanization showed higher, stable bond strengths with and without aging. The durability of resin-ceramic adhesion varied, depending on the adhesive cement type.

show abstract

Section: Discussionmentioning

confidence: 99%

Adhesive Quality of Self-adhesive and Conventional Adhesive Resin Cement to Y-TZP Ceramic Before and After Aging Conditions

Passos¹,

May²,

Barca³

et al. 2010

Operative Dentistry

View full text Add to dashboard Cite

show abstract

“…In addition to its exceptional strength, zirconia's intermediate elastic modulus (~ 780 GPa) provides advantages in layered structures by shifting damage and fracture modes into the porcelain veneer layer compared with fully dense alumina (~ 340 GPa) (Kim et al, 2007). Interestingly, hardness, being a combination of elastic modulus and strength, is less for zirconia than for alumina (Lazar et al, 2008).…”

Section: Core Materialsmentioning

confidence: 99%

“…Co-precipitation from metal aqueous solutions has been shown to yield chemical and physical homogeneity in non-dental zirconia applications while being cost-effective and simpler than many alternatives to achieve similar results (Lazar et al, 2008). Applying this approach to synthesis of Y-TZP powder specimens created by pressureless sintering produced zirconias with higher toughness than both commercially available alumina (Procera All-Ceram) and zirconia-infiltrated alumina (In-Ceram Zirconia Block created both by dry pressing and slip casting).…”

Section: New Processing Approachesmentioning

confidence: 99%

Performance of Dental Ceramics: Challenges for Improvements

et al. 2011

View full text Add to dashboard Cite

The clinical success of modern dental ceramics depends on an array of factors, ranging from initial physical properties of the material itself, to the fabrication and clinical procedures that inevitably damage these brittle materials, and the oral environment. Understanding the influence of these factors on clinical performance has engaged the dental, ceramics, and engineering communities alike. The objective of this review is to first summarize clinical, experimental, and analytic results reported in the recent literature. Additionally, it seeks to address how this new information adds insight into predictive test procedures and reveals challenges for future improvements.

show abstract

“…The success of the biomaterial in the body depends on mechanical properties and biocompatibility. Some stabilizing oxides such as CaO, MgO, CeO 2 and Y 2 O 3 are supplemented to the structure in order to withstand the phase transformations [5,10]. The positive experience and studies of ZrO 2 that achieved by orthopedics, navigates the dentist to inspire an alternative treatment strategy in odontology [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…The geological process that forms zirconium minerals such as zirconium silicate (ZrSiO 4 ) and zirconium dioxide (ZrO 2 ) leads to incorporation of some radionuclides into crystal structure [2]. Zirconia, is a polymorphic oxide that exist in three different crystal structures as monoclinic, tetragonal and cubic [3][4][5]. In particular, ZrO 2 typically contains trace amounts of radionuclides such as radium and thorium and also uranium [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Radioactive Potential of Zirconium-dioxide Used for Dental Applications

Bavbek

Özcan

Eskitaşçıoğlu

2014

Journal of Applied Biomaterials & Functional Materials

View full text Add to dashboard Cite

PURPOSE The purpose of this study was to investigate the possible radioactive potential of zirconium dioxide (ZrO2) dental ceramics. Such information is necessary since they became an integral part of routine prosthetic rehabilitations and devoid of scientific information about their radioactivity creates some concern in the dental community. METHODS Four different types of commercial ZrO2 ceramics, namely Lava, Cercon, ICE Zirkon, and Everest Bio ZS were investigated before and after the sintering process. Sintering temperatures were applied according to each manufacturer's instructions. The compositions of the presintered and sintered specimens were analyzed using x-Ray Fluorescence Spectrometer (XRF). Concentrations of the elements and compounds were also measured by this method. Determination of radioactivity continued with Gamma-spectrometry measurements and Gross alpha/Beta analyses. RESULTS The activity of gamma and Gross alpha/beta was below minimum detection limits (MDL) for presintered and sintered ZrO2. The MDLs of gross alpha/beta counting system were 0.02 Bq/g and 0.01 Bq/g for alpha and beta radioactivity, respectively. The sintering process played only a minor role in the composition of the compounds. CONCLUSIONS Radioactivity of the ZrO2 ceramics studied showed negligible radionuclide activity that can be considered lower than many hazardous radioactive appliances in our environment. ABSTRACTObjectives. The purpose of this study was to investigate the possible radioactive potential of zirconium dioxide (ZrO 2 ) dental ceramics. Such information is necessary since they became an integral part of routine prosthetic rehabilitations and devoid of scientific information about their radioactivity creates some concern in the dental community.Methods. Four different types of commercial ZrO 2 ceramics, namely Lava, Cercon, ICE Zirkon and Everest Bio ZS were investigated before and after sintering process. Sintering temperatures were applied according to each manufacturer's instructions. The compositions of the presintered and sintered specimens were analyzed using X-Ray Fluorescence Spectrometer (XRF). Also concentrations of the elements and compounds were measured by this method.Determination of radioactivity was continued with Gamma-spectrometry measurements andGross alpha/Beta analyses.Results. For a 24 hour counting time, no measurable level of gamma and gross alpha/beta emitting radionuclide activity. The activity of gamma and Gross alpha/beta below minimum detection limits (MDL) for presintered and sintered ZrO2. The MDLs of gross alpha/beta counting system were 0.02Bq/g and 0.01 Bq/g for alpha and beta, radioactivity respectively. Sintering process played only a minor role at the composition of the compounds.Significance. Radioactivity of the studied ZrO 2 ceramics showed negligible radionuclide activity that can be considered lower than many hazardous radioactive appliances in our environment.

show abstract

Y-TZP ceramic processing from coprecipitated powders: A comparative study with three commercial dental ceramics

Cited by 77 publications

References 27 publications

Adhesive Quality of Self-adhesive and Conventional Adhesive Resin Cement to Y-TZP Ceramic Before and After Aging Conditions

Adhesive Quality of Self-adhesive and Conventional Adhesive Resin Cement to Y-TZP Ceramic Before and After Aging Conditions

Performance of Dental Ceramics: Challenges for Improvements

Radioactive Potential of Zirconium-dioxide Used for Dental Applications

Contact Info

Product

Resources

About