The influence of low-temperature degradation and cyclic loading on the fracture resistance of monolithic zirconia molar crowns

Nakamura, Keisuke; Harada, Akio; Kanno, Taro; Inagaki, Ryoichi; Niwano, Yoshimi; Milleding, Percy; Örtengren, Ulf

doi:10.1016/j.jmbbm.2015.03.007

Cited by 83 publications

(59 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The influence of LTD (autoclaved at 134 C for 0À200 h) and cyclic loading (300 N for 240,000 cycles) on fracture resistance of monolithic zirconia was studied by Nakamura et al [45] The fracture load of the crowns significantly decreased from 5683 to 3975 N after LTD induced by autoclaving. The effect of cyclic loading on fracture load was not statistically significant.…”

Section: Fracture Resistancementioning

confidence: 99%

An overview of monolithic zirconia in dentistry

Malkondu

Tınastepe

Akan

et al. 2016

Biotechnology & Biotechnological Equipment

View full text Add to dashboard Cite

Zirconia restorations have been used successfully for years in dentistry owing to their biocompatibility and good mechanical properties. Because of their lack of translucency, zirconia cores are generally veneered with porcelain, which makes restorations weaker due to failure of the adhesion between the two materials. In recent years, all-ceramic zirconia restorations have been introduced in the dental sector with the intent to solve this problem. Besides the elimination of chipping, the reduced occlusal space requirement seems to be a clear advantage of monolithic zirconia restorations. However, scientific evidence is needed to recommend this relatively new application for clinical use. This mini-review discusses the current scientific literature on monolithic zirconia restorations. The results of in vitro studies suggested that monolithic zirconia may be the best choice for posterior fixed partial dentures in the presence of high occlusal loads and minimal occlusal restoration space. The results should be supported with much more in vitro and particularly in vivo studies to obtain a final conclusion.

show abstract

Section: Fracture Resistancementioning

confidence: 99%

An overview of monolithic zirconia in dentistry

Malkondu

Tınastepe

Akan

et al. 2016

Biotechnology & Biotechnological Equipment

View full text Add to dashboard Cite

show abstract

“…Conservative monolithic zirconia restorations with less than 1 mm can be milled and still present strength similar or superior to that of metal-ceramic and lithium disilicate crowns [4–6]. However, concerns like the challenge of promoting enhanced adhesion between substrate and zirconia ceramic [7], aging (hydrothermal degradation) [8–9], and wear of antagonist teeth [10] have limited the use of monolithic zirconia.…”

Section: Introductionmentioning

confidence: 99%

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

et al. 2017

View full text Add to dashboard Cite

Objective This study evaluated the effects of two grading zirconia techniques on the fatigue limit of 3-unit fixed dental prostheses (FDPs). Methods Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer’s instructuctions. The two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5 Hz). Results The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95% confidence interval). Significance The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.

show abstract

“…10 As a novel alternative dental prosthetic treatment using monolithic zirconia, highstrength tooth-or implantsupported restorations can be fabricated with acceptable esthetic results in a reasonable time and at a reasonable cost. 3,[11][12][13][14][15][16][17][18] Even after mechanical and thermal aging, monolithic zirconia crowns can endure much higher fracture loads 19 than the average maximal occlusal forces 20 in the posterior section of the mouth. Initial studies of the survival rate of monolithic zirconia crowns have estimated fracture rates of between 0.2% and 0.7% for Purpose.…”

mentioning

confidence: 99%

“…16,18 In vitro investigations have shown that monolithic zirconia crowns with a minimal occlusal thickness of 0.7 mm for implantsupported 21 and 0.5 mm for tooth-supported 15,17 restorations can withstand the masticatory forces in the posterior segment in the long term. This makes them a viable alternative for restorations in patients with limited interarch distance, 21 the need for preservation of tooth structure, 3,19 and insufficient clinical crown length. Recent clinical evidence has presented the results of monolithic zirconia restorations as wear-friendly to opposing dental enamel in their polished state compared with glazed metal ceramic restorations placed in the premolar and molar regions.…”

mentioning

confidence: 99%