Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Qian, Haixin; Cui, Chong; Su, Tingshu; Zhang, Fuqiang; Sun, Junqiang

doi:10.4012/dmj.2015-184

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…KZ group showed highest value of fracture resistance. This result is consistent with previous studies [27,28] in which restorations were resistance to high forces exceeding maximum human chewing forces. Followed by, EM group that showed tolerance to high fracture forces.…”

Section: Discussionsupporting

confidence: 94%

Influence of fatigue loading on fracture resistance of endodontically treated teeth restored with endocrowns

Elashmawy¹,

Elshahawy²,

Seddik³

et al. 2021

J Prosthodont Res

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Purpose: This in vitro study aimed to evaluate the influence of fatigue loading on fracture resistance of endodontically treated molars restored with endocrowns using different machinable blocks. Methods: Endodontically treated mandibular first molars were prepared using a standardized method. Specimens were divided into 4 groups (n = 10). Anatomically shaped endocrowns groups were manufactured using VITA ENAMIC (VE) and KATANA Zirconia (KZ). Layered endocrowns groups were manufactured using IPS e.max CAD (EM) and BioHPP (BH). Half of the specimens of each group were subjected to fracture resistance test, while the other half were subjected to thermocycling and chewing simulation. After fatigue loading, specimens were loaded until failure. Specimens were examined using stereomicroscopy. Data were analyzed using ANOVA analysis of variance and Bonferroni post hoc test (α=0.05). Results: KZ group had the highest initial fracture resistance value (1810.20± 119.56 N) and BH had the lowest value (579.50± 76.15 N). The reduction of fracture resistance after fatigue loading was significant for KZ group (1588.30±216.25 N) and BH group (502.60±11.53 N) and non-significant to VE group (1101.70±77.05 N) and EM group (1112.10±74.12 N). Failure modes of KZ and EM groups showed high percentage of non-restorable fractures, while VE and BH groups showed high percentage of restorable fractures. Conclusions: Within the limitations of this study, the following can be concluded: Poly infiltrated ceramics should be considered as a proper material to be used as an endocrown material because of its ability to be restorable if failure occurred.

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Section: Discussionsupporting

confidence: 94%

Influence of fatigue loading on fracture resistance of endodontically treated teeth restored with endocrowns

Elashmawy¹,

Elshahawy²,

Seddik³

et al. 2021

J Prosthodont Res

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“…Moreover, mechanical retention was also obtained in the conditioner-coated specimens. Our assumption is supported by previous studies of synthetic, functionally-graded materials [21,22]. Qian et al [21] formed graded glass/zirconia structures which were prepared by a coating glass-powder-containing slurry (different from our conditioner) onto Y-TZP surface before sintering.…”

Section: Discussionsupporting

confidence: 71%

“…Our assumption is supported by previous studies of synthetic, functionally-graded materials [21,22]. Qian et al [21] formed graded glass/zirconia structures which were prepared by a coating glass-powder-containing slurry (different from our conditioner) onto Y-TZP surface before sintering. They explained that a certain degree of porosity existed in the pre-sintered zirconia, which could facilitate glass infiltration, a statement that is also reflected by our findings.…”

Section: Discussionsupporting

confidence: 71%

Influence of the Conditioning Method for Pre-Sintered Zirconia on the Shear Bond Strength of Bilayered Porcelain/Zirconia

Spintzyk¹,

Yamaguchi

Sawada³

et al. 2016

Materials

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This study evaluated the bond strength of veneering porcelain with an experimental conditioner-coated zirconia. Pre-sintered Y-TZP specimens (n = 44) were divided in two groups based on conditioning type. After sintering, all sample surfaces were sandblasted and layered with veneering porcelain. Additionally, half of the specimens in each group underwent thermal cycling (10,000 cycles, 5–55 °C), and all shear bond strengths were measured. After testing, the failure mode of each fractured specimen was determined. Differences were tested by parametric and Fisher’s exact tests (α = 0.05). The differences in bond strength were not statistically significant. Adhesive fractures were dominantly observed for the non-thermal cycled specimens. After thermal cycling, the conditioner-coated group showed cohesive and mixed fractures (p = 0.0021), whereas the uncoated group showed more adhesive fractures (p = 0.0021). Conditioning of the pre-sintered Y-TZP did not change the shear bond strength of the veneering porcelain, but did improve the failure mode after thermal cycling.

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“…For LD crowns, the most of failures occurred as radial crack restricted to crowns (50% with PEEK and 60% with YZ). For TZ crowns, the prevalent failure patterns were screw and implant platform fractures (50% with PEEK and 40% with YZ abutment), which are in agreement with a previous study showing more complications in PEEK abutments restored with TZ crowns, as screw loosening or fracture 35 . This result can be due to greater TZ crown structural strength, which resisted to stress generated by the loading and promoted failure at implant-related structures.…”

Section: Discussionsupporting

confidence: 91%

Fadiga mecânica de pilares híbridos de polieteretercetona (PEEK) para sistemas de coroas total cerâmica

Barbosa¹

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A Ata da defesa, assinada pelos membros da Comissão Examinadora, consta no SIGA/Sistema de Fluxo de Dissertação/Tese e na Secretaria do Programa da Unidade. DedicatóriaDedico esse trabalho primeiramente a Deus, pela vida, por sempre guiar meu caminho, proporcionando-me diversas oportunidades e conquistas.Aos meus pais, pelo apoio constante e incansável, por estarem ao meu lado em todos os momentos, principalmente, nos períodos mais árduos.Aos meus irmãos Régis Augusto Barbosa e João Pedro Barbosa, por todos os momentos exultantes que tivemos juntos, pelas valiosas oportunidades de resenha que religiosamente tivemos e que habitualmente ainda teremos. Às minhas avósDiva Neiva Beux e Maria Zancanaro Barbosa (in memoriam), por todo carinho e cuidados com que sempre fui agraciado. Aos meus avôs Geni Beux (in memoriam) e Orozimbo Barbosa in memoriam, e tio Jeferson Simões in memoriam, os quais sempre me incentivaram veementemente a persistir na busca da felicidade. À minha querida e amada noiva Mayara Manueira da Silveira, pelo companheirismo, condescendência e flexibilidade. Por me incentivar na busca dos meus sonhos e partilhar dos mesmos comigo. Pelos maravilhosos momentos leves e de risos fáceis que contribuíram para a obtenção desse trabalho. Aos meus sogros Silézio e Rosiney da Silveira, por todo o carinho e ajuda que me foi disponibilizado, além de todo o incentivo em cada momento de dificuldade. Agradecimento Especial Ao meu orientador Prof. Dr. Rafael Leonardo Xediek Consani, pela paciência e apoio em todos os instantes, e, acima de tudo, por confiar em meu trabalho, disponibilizando o suporte e os ensinamentos necessários durante o período do meu doutorado. Ao amigo Prof. Dr. Ataís Bacchi, docente na disciplina de Prótese Dental na Faculdade de Odontologia da Imed, pelo suporte para a realização deste trabalho, assim como a amizade que ja que possuíamos nos períodos de graduação, que só se fez fortalecer durante este período. Ao amigo Prof. Dr. Christian Schuh, docente nas disciplinas de implantodontia e periodontia do Centro de Estudos Odontológicos do Medirional -CEOM, pelas horas de discussão e empenho que resultou na elucidação deste trabalho. Ainda, pela ajuda nos processos de confecção das amostras testadas no presente estudo. Ao amigo prof. Dr. Marcelo Ferraz Mesquita, por excelente convivência durante dois anos e meio de convívio diário, muito solícito para consultas, ensino com respeito e muito agregador. À prof(a) Dra. Cláudia Lopes Brilhante Bhering por sua amizade, convivência e ajudas durante o período em que morei em Piracicaba, e por agregar muito nas sugestões em nosso trabalho. Aos professores, Dr. Guilherme da Gama Ramos e Dr Mário Alexandre, Coelho Sinhoreti por suas amizades, excelente convívio e pontuações muito pertinentes para nosso trabalho.

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Exploring the optimal pre-sintering temperature on compressive strength and anti-fatigue property of graded zirconia-based glass/zirconia structure

Cited by 7 publications

References 12 publications

Influence of fatigue loading on fracture resistance of endodontically treated teeth restored with endocrowns

Influence of fatigue loading on fracture resistance of endodontically treated teeth restored with endocrowns

Influence of the Conditioning Method for Pre-Sintered Zirconia on the Shear Bond Strength of Bilayered Porcelain/Zirconia

Fadiga mecânica de pilares híbridos de polieteretercetona (PEEK) para sistemas de coroas total cerâmica

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