Enamel Wear Opposing Polished and Aged Zirconia

Burgess, John O.; Janyavula, Sridhar; Lawson, NC; Lucas, TJ; Çakır, Deniz

doi:10.2341/12-345-l

Cited by 50 publications

(51 citation statements)

References 27 publications

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“…Previous studies found that the texture of ceramic surfaces affects wear of opposing materials (13)(14)(15)(16). The present study compared wear of standardized polished and glazed rod specimens.…”

Section: Discussionmentioning

confidence: 91%

“…However, other studies found that wear of ceramics was greater for materials opposed to glazed ceramics than for those opposed to polished ones (12)(13)(14)(15)(16). Janyavula et al reported that material and antagonist wear was greater for glazed zirconia than for polished zirconia (13). Lawson et al reported that wear of opposing enamel was less for polished than for glazed lithium disilicate glass (LDG) ceramics (15).…”

Section: Introductionmentioning

confidence: 99%

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Wear characteristics of polished and glazed lithium disilicate ceramics opposed to three ceramic materials

et al. 2016

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This study compared the wear characteristics of a heat-pressed lithium disilicate ceramic material opposed to feldspathic porcelain, a lithium disilicate glass ceramic, and zirconia materials. Ceramic plate specimens were prepared from feldspathic porcelain (EX-3 nA1B), lithium disilicate glass ceramics (e.max CAD MO1/C14), and zirconia (Katana KT 10) and then ground or polished. Rounded rod specimens were fabricated from heatpressed lithium disilicate glass ceramic (e.max press LT A3) and then glazed or polished. A sliding wear testing apparatus was used for wear testing. Wear of glazed rods was greater than that of polished rods when they were abraded with ground zirconia, ground porcelain, polished porcelain, or polished lithium disilicate ceramics. For both glazed and polished rods, wear was greater when the rods were abraded with ground plates. The findings indicate that application of a polished surface rather than a glazed surface is recommended for single restorations made of heat-pressed lithium disilicate material. In addition, care must be taken when polishing opposing materials, especially those used in occlusal contact areas. (J Oral Sci 58, 117-123, 2016)

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Wear characteristics of polished and glazed lithium disilicate ceramics opposed to three ceramic materials

et al. 2016

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“…This is in contrast to other reports on the effects of aged zirconia when in contact with enamel. 27 After artificial aging of zirconia using autoclave and testing, no significant difference between aged and untreated zirconia was observed, as it affected enamel in the same way. 27 …”

Section: Discussionmentioning

confidence: 94%

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Bartolo

Cassar

Husain

et al. 2017

The Journal of Prosthetic Dentistry

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Statement of problem. Yttria-stabilized zirconia used for the fabrication of crowns and fixed\ud \ud prostheses may require intraoral adjustments after placement and cementation. Grinding and\ud \ud polishing methods may result in changes in the surface characteristics of zirconia.\ud \ud Purpose. The purpose of this in vitro study was to assess the effect of polishing procedures on\ud \ud surface roughness, topographical and phase changes of zirconia, and wear of the opposing dentition.\ud \ud Material and methods. Presintered and precut yttria-stabilized zirconia specimens (10×10×1 mm)\ud \ud were divided into 4 groups (control, Intensiv, Shofu, 3M ESPE) depending on the polishing method\ud \ud used to prepare the specimens. All tests were carried out in triplicate. The specimens were polished\ud \ud depending on the polishing regimen, while the control was left untreated. The specimens were\ud \ud thermocycled for 3000 cycles, with a temperature range of 5C to 55C. The surface roughness,\ud \ud elemental, and phase changes caused by polishing before and after thermocycling were assessed\ud \ud with surface profilometry, energy-dispersive spectroscopy, and X-ray diffraction analysis. The wear on\ud \ud antagonist steatite balls was also measured after mastication simulation. Statistical analysis was\ud \ud performed using 1-way ANOVA and the Tukey post hoc test to perform multiple comparison tests (a=.05).\ud \ud Results. The polishing procedures increased surface roughness (Ra) of yttria-stabilized zirconia from\ud \ud 0.52 for the control specimen to 0.73 for Intensiv, 0.70 for Shofu, and 0.70 for 3M ESPE (P<.05), which\ud \ud was reduced by thermocycling to 0.44 (control), 0.58 (Intensiv), and 0.58 (Shofu) (P<.001), while\ud \ud roughness remained unchanged for 3M ESPE specimens (0.75; P=.452). The deposition of aluminum\ud \ud when using Shofu abrasives and nickel in Intensiv was demonstrated. Phase changes were observed\ud \ud on the zirconia surface with formation of the monoclinic phase in all polishing methods. Specimen\ud \ud aging enhanced the surface phase changes and also induced compressive stresses in zirconia\ud \ud polished with Intensiv. The different polishing protocols did not affect the wear to the antagonist (P>.05).\ud \ud Conclusions. Polishing zirconia increased surface roughness and led to surface phase changes, but\ud \ud wear to the antagonist was not affected.peer-reviewe

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“…Although only some preliminary clinical trials on monolithic zirconia dental restorations have been published [1,4–7], in vitro studies revealed that monolithic zirconia crowns can endure the highest fracture load among all ceramic restorative systems [3,8]. In addition, laboratory testing [9–12] and clinical researches [5,13,14] have shown that polished zirconia causes less tooth enamel wear than glazed zirconia, whereas glazed zirconia exhibits comparable or better results than other dental ceramic materials.…”

Section: Introductionmentioning

confidence: 99%

Speed sintering translucent zirconia for chairside one-visit dental restorations: Optical, mechanical, and wear characteristics

Kaizer

Gierthmuehlen

Santos

et al. 2017

Ceramics International

104

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The fabrication of zirconia dental restorations is a time-consuming process due to traditional slow sintering schemes; zirconia (Y-TZP) produced by these conventional routes are predominantly opaque. Novel speed sintering protocols have been developed to meet the demand for time and cost effective chairside CAD/CAM-produced restorations, as well as to control ceramic microstructures for better translucency. Although the speed sintering protocols have already been used to densify dental Y-TZP, the wear properties of these restorations remain elusive. Fast heating and cooling rates, as well as shorter sintering dwell times are known to affect the microstructure and properties of zirconia. Thus, we hypothesize that speed sintered zirconia dental restorations possess distinct wear and physical characteristics relative to their conventionally sintered counterparts. Glazed monolithic molar crowns of translucent Y-TZP (inCoris TZI, Sirona) were fabricated using three distinct sintering profiles: Super-speed (SS, 1580 °C, dwell time 10 min), Speed (S, 1510 °C, dwell time 25 min), and Long-term (LT, 1510 °C, dwell time 120 min). Microstructural, optical and wear properties were investigated. Crowns that were super-speed sintered possessed higher translucency. Areas of mild and severe wear were observed on the zirconia surface in all groups. Micropits in the wear crater were less frequent for the LT group. Groups S and SS exhibited more surface pits, which caused a scratched steatite surface that is associated with a greater volume loss. Tetragonal to monoclinic phase transformation, resulting from the sliding wear process, was present in all three groups. Although all test groups had withstood thermo-mechanical challenges, the presence of hairline cracks emanating from the occlusal wear facets and extending deep into the restoration indicates their susceptibility to fatigue sliding contact fracture.

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Enamel Wear Opposing Polished and Aged Zirconia

Cited by 50 publications

References 27 publications

Wear characteristics of polished and glazed lithium disilicate ceramics opposed to three ceramic materials

Wear characteristics of polished and glazed lithium disilicate ceramics opposed to three ceramic materials

Effect of polishing procedures and hydrothermal aging on wear characteristics and phase transformation of zirconium dioxide

Speed sintering translucent zirconia for chairside one-visit dental restorations: Optical, mechanical, and wear characteristics

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