Effects of thickness, processing technique, and cooling rate protocol on the flexural strength of a bilayer ceramic system

Lima, J.M.C.; Souza, Ana Carolina; Anami, Lilian Costa; Bottino, Marco Antônio; Melo, Renata Marques de; Souza, Rodrigo Othávio de Assunção e

doi:10.1016/j.dental.2013.07.019

Cited by 49 publications

(40 citation statements)

References 48 publications

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“…Although being far from a clinical relevance, uniaxial or biaxial bending tests [12,13], delamination tests via flexural bending techniques [14], and even structural testing of crowns and bridges [15] are examples of standardized methodologies providing answers to specific and clinically relevant questions about the interface. Several test variables such as thickness ratio [16], loading speed and direction [17] or mismatch between elastic and thermal properties [18] are usually added to this type of experimental setup. In addition to the external loading scenario, the quality of a multilayered specimen and the corresponding interface is strongly dependent on the internal residual stress state [18][19][20].…”

Section: Interfacial Strength Testingmentioning

confidence: 99%

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

et al. 2017

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Section: Interfacial Strength Testingmentioning

confidence: 99%

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

et al. 2017

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“…For all-ceramic restorations the preparation has to be rounded carefully and no sharp angles should exist [4,[22][23][24][25]. The thickness of the ceramic restoration is another factor influencing its fracture resistance [26]. Scientific data on the minimum thickness of lithium disilicate ceramic partial crowns or occlusal veneers is rare.…”

Section: Introductionmentioning

confidence: 99%

Influence of restoration thickness and dental bonding surface on the fracture resistance of full-coverage occlusal veneers made from lithium disilicate ceramic

et al. 2015

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“…2,3 However, this type of restoration has residual stress generated by thermal issues 4-6 and hence is susceptible to fracture. 7 This susceptibility may also be explained by the processing technique 8,9 or inadequate porcelain support. 10 …”

Section: Introductionmentioning

confidence: 99%

Failure Probability of Three Designs of Zirconia Crowns

Ramos¹,

Monteiro²,

Bottino³

et al. 2015

Int J Periodontics Restorative Dent

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Objectives This study utilized a 2-parameter Weibull analysis for evaluation of lifetime of fully or partially porcelain-/glaze-veneered zirconia crowns after fatigue test. Methods Sixty first molars were selected and prepared for full-coverage crowns with three different designs(n = 20): Traditional –crowns with zirconia framework covered with feldspathic porcelain; Modified– crowns partially covered with veneering porcelain; and Monolithic–full-contour zirconia crowns. All specimens were treated with a glaze layer. Specimens were subjected to mechanical cycling (100N, 3Hz) with a piston with hemispherical tip (Ø=6 mm) until the specimens failed or up to 2×106 cycles. Every 500,000 cycles intervals, the fatigue tests were interrupted, and stereomicroscopy (10 X) was used to inspect the specimens for damage. We performed Weibull analysis of interval data to calculate the number of failures in each interval. Results The types and number of failures according to the groups were: cracking (Traditional-13, Modified-6) and chipping (Traditional-4) of the feldspathic porcelain, followed by delamination (Traditional-1) at the veneer/core interface and debonding (Monollithic-2) at the cementation interface. Weibull parameters (beta, scale; and eta, shape), with a two-sided confidence interval of 95%, were: Traditional – 1.25 and 0.9 × 106cycles; Modified– 0.58 and 11.7 × 106 cycles; and Monolithic – 1.05 and 16.5 × 106 cycles. Traditional crowns showed greater susceptibility to fatigue, the Modified group presented higher propensity to early failures, and the Monolithic group showed no susceptibility to fatigue. The Modified and Monolithic groups presented the highest number of crowns with no failures after the fatigue test. Conclusions The three crown designs presented significantly different behaviors under fatigue. The Modified and the Monolithic groups presented less probability to failure after 2×106cycles.

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Effects of thickness, processing technique, and cooling rate protocol on the flexural strength of a bilayer ceramic system

Cited by 49 publications

References 48 publications

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

ADM guidance-Ceramics: all-ceramic multilayer interfaces in dentistry

Influence of restoration thickness and dental bonding surface on the fracture resistance of full-coverage occlusal veneers made from lithium disilicate ceramic

Failure Probability of Three Designs of Zirconia Crowns

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