Adherence of Porcelain Veneered on Titanium with an Intermediate Plasma-Sprayed Zirconia Layer

Lo, Tsung Nan; Chang, Edward F.; Lui, Truan-Sheng

doi:10.2320/matertrans.45.947

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…The use of Si 3 N 4 , chrome, SiO 2 , and TiO 2 as intermediate layers to minimize Ti oxidation for Ti-porcelain restorations has been investigated ( Ref 4,[8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxidation and SiO2 Coating on the Bonding Strength of Ti-Porcelain

Guo

Liu

Zhu

et al. 2010

J. of Materi Eng and Perform

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Investigations on the effect of oxidation on titanium-ceramic adhesion were performed. Cast pure titanium was subjected to surface modification by preoxidation and introduction of an intermediate layer of SiO 2 by sol-gel process. Specimens were characterized by TG-DSC, XRD, and SEM/EDS. The adhesion between the titanium and porcelain was evaluated by three-point flexure bond test. Failure of the titanium-porcelain with preoxidation treatment predominantly occurred at the titanium-oxide interface. Preoxidation treatment did not affect the fracture mode of the titanium-ceramic system and did not increase the bonding strength of Ti-porcelain. The SEM results revealed the existence of microcracks on the SiO 2 coating surface oxidized at 800°C in an air furnace. During the porcelain fusion, minute amounts of oxygen were able to penetrate the cracks and caused localized oxidation of the Ti-substrate. Failure of the titanium-porcelain with SiO 2 coating predominantly occurred at the SiO 2 layer. The SiO 2 coating served as an effective oxygen diffusion barrier and improved the mechanical and chemical bonding between porcelain and titanium.

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“…The use of Si 3 N 4 , chrome, SiO 2 , and TiO 2 as intermediate layers to minimize Ti oxidation for Ti-porcelain restorations has been investigated ( Ref 4,[8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxidation and SiO2 Coating on the Bonding Strength of Ti-Porcelain

Guo

Liu

Zhu

et al. 2010

J. of Materi Eng and Perform

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“…According to our previous studies, 12,13) the location of adhesive failure occurred near the Ti oxide/Ti interface and even slightly inside the uppermost Ti substrate. This revealed that the porcelain/Ti oxide interface possesses fairly high bonding strength, i.e.…”

Section: Introductionmentioning

confidence: 64%

Interfacial Characterization of Porcelain Veneered on the Pure Titanium under Vacuum Firing

Lui

Chang

2004

Mater. Trans.

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The interfacial characteristics between porcelain coating and titanium under vacuum firing at 800 C have not been well documented. The cross-sectional variations in microstructures and compositions at the porcelain/Ti interface were investigated with a SEM and an EPMA equipped with WDS. The phase constituents of the porcelain bulk coating and the nearby porcelain/Ti interface were analyzed by X-ray and thin-film X-ray diffractometry respectively. In addition, a TEM equipped with EDS was used to examine the porcelain/Ti oxide interface. The experimental results revealed that the oxidation of Ti occurred at the porcelain/Ti interface, and it is reasonable to deduce that the Ti reduces the SnO 2 and SiO 2 components of the porcelain and becomes Ti oxide. Furthermore, redox reactions and chemical bonding occur at porcelain/Ti interface during firing and thus prevent the initiation of fracture from occurring at this interface. Subsequently, the fracture initiation tends to be located near the interface of newly formed Ti oxide and Ti substrate and/or slightly inside the Ti.

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“…The mean T deb collected for all the tested groups are reported in Table IV. Significant differences were found among groups as determined by the 1-way ANOVA (F [3,36]¼8.6, P<.05). The mean (AESD) debond strengths for both the control (23.51 AE2.94 MPa) and type 1 coating (25.97 AE2.53 MPa) were near the acceptable lower limit of 25 MPa.…”

Section: Resultsmentioning

confidence: 88%

“…The bond strength values obtained for the group that received the ceramic slurry were in the range of 26 to 28 MPa. Lo et al 36 reported that the application of an intermediate plasma-sprayed ZrO 2 layer provides a higher surface roughness, which enhances the mechanical bond at the ZrO 2 -porcelain interface and acts as a sufficient oxygen diffusion barrier at 800 C to prevent the oxidation of Ti at the Ti-ZrO 2 interface. Similarly, Chou and Chang 35 reported that the bonding strength…”

Section: Discussionmentioning

confidence: 99%

“…34 Cubic ZrO 2 stabilized with 8 wt% Y 2 O 3 is the most widely proposed compound for ceramic coatings intended to enhance the Ti-porcelain bond strength in dentistry. 33,35,36 As in aerospace gas turbine engines, it provides the best performance in high-temperature applications experienced in the field of thermal barrier coatings, 34 which are ceramic coatings used to protect and insulate metallic components exposed to high temperatures. ZrO 2 stabilized by CaO and MgO also has been studied for thermal barrier coatings 34 and might be a viable compound for producing protective coating layers and promoting adhesion in Ti-ceramic dental restorations.…”

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confidence: 99%

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