• Filter By:
• Specialty
• Source
• Condition
• Cancer
• Infectious Disease
• Drug
• Training
• Management
• Procedure
• Therapy
• Vaccine
• Nutrition
• Country

Impact of glazing on wear, fracture load, and optical properties of a new fully crystallized lithium disilicate ceramic material
CONCLUSIONS: The glazed fully crystallized LDS was superior to the partially crystallized one with regard to wear resistance but showed more color changes than the polished fully crystallized one. Furthermore, polishing of fully crystallized LDS could still be considered a better option than glazing when aesthetics is a primary prerequisite.PMID:37660448 | DOI:10.1016/j.jmbbm.2023.106102
Source: Journal of the Mechanical Behavior of Biomedical Materials - September 3, 2023 Category: Materials Science Authors: Ahmed Mahmoud Fouda Bogna Stawarczyk Mutlu Özcan Lamia Singer Christoph Bourauel Source Type: research

Effect of preparation design on fracture strength of compromised molars restored with lithium disilicate inlay and overlay restorations: An in vitro and in silico study
CONCLUSIONS: The preparation design affected the fracture strength of compromised molars restored with lithium disilicate inlays and overlays, with significantly lower fracture strength for an extended inlay. The failure pattern of lithium disilicate overlays is significantly more destructive than that of undermined and extended inlays. The finite element analysis showed more tooth deformation in the inlay restorations, with lower forces in the roots, leading to less destructive fractures. Since cusp coverage restorations fracture in a more destructive manner, this study suggests the undermined inlay preparation design as ...
Source: Journal of the Mechanical Behavior of Biomedical Materials - September 2, 2023 Category: Materials Science Authors: Jelte W Hofsteenge Marco Aurelio Carvalho Pauline M Borghans Marco S Cune Mutlu Özcan Pascal Magne Marco M M Gresnigt Source Type: research

Influence of thickness and degree of opacity of lithium disilicate on the degree of conversion and bond strength of resin cements
J Mech Behav Biomed Mater. 2023 May 22;143:105934. doi: 10.1016/j.jmbbm.2023.105934. Online ahead of print.ABSTRACTThe aim of this study was to evaluate the influence of various opacities and thicknesses of lithium disilicate on the degree of conversion (DC) of two resin cements and on their bond strength (BS) to the ceramic. Two hundred and forty ceramic samples of lithium disilicate with high translucency (HT), low translucency (LT), and medium opacity (MO) were obtained from IPS e. max CAD in five different thicknesses. Light-cured and dual-cured resin cements were used for DC (n = 9) and BS (n = 8). Cement samples were...
Source: Journal of the Mechanical Behavior of Biomedical Materials - May 31, 2023 Category: Materials Science Authors: Mariana Elias Queiroz Ana Teresa Maluly-Proni Mariana Sati Cantalejo Tsutsumi Eduardo Dallazen Lidiane Vizioli de Castro-Hoshino Monique de Souza Mauro Luciano Baesso Paulo Henrique Dos Santos Source Type: research

Manufacturing and characterization of a 3D printed lithium disilicate ceramic via robocasting: A pilot study
The objective of this study was to manufacture and to evaluate the physico-mechanical properties of the Lithium disilicate (Li2O5Si2) ceramic structures fabricated using additive manufacturing (3D printing).METHODS: Li2O5Si2 samples were divided into (n = 30/group): SM (subtractively manufactured) and AR (additive/robocasting). For the AR group, Li2O5Si2 powder was combined with ammonium polyacrylate, hydroxypropyl methylcellulose, and polyelectrolyte to create a colloidal gel, which was then used for printing. A digital CAD model of a disc was designed, and the G-code transferred to a custom built DIW 3D printer. The cont...
Source: Journal of the Mechanical Behavior of Biomedical Materials - May 10, 2023 Category: Materials Science Authors: Jo ão Luiz Bittencourt de Abreu Ronaldo Hirata Lukasz Witek Ernesto Byron Benalcazar Jalkh Vasudev Vivekanand Nayak Bruno Martins de Souza Eduardo Moreira da Silva Source Type: research

Adhesion to lithium disilicate glass-ceramics after aging: Resin viscosity and ceramic surface treatment effects
CONCLUSION: Differences in filler content can impact the resin viscosity of the material (more fillers increase the viscosity), which in turn can influence the bond strength of a lithium disilicate ceramic, depending on the surface treatment and storage regimen.PMID:37062098 | DOI:10.1016/j.jmbbm.2023.105819
Source: Journal of the Mechanical Behavior of Biomedical Materials - April 16, 2023 Category: Materials Science Authors: Kiara Serafini Dapieve Rafaela Oliveira Pilecco Renatta Wrasse Temp Marcos Antonio Villetti Gabriel Kalil Rocha Pereira Luiz Felipe Valandro Source Type: research

Polishing the bonding surface, before or after crystallization, does not alter the fatigue behavior of bonded CAD-CAM lithium disilicate
J Mech Behav Biomed Mater. 2023 Mar 24;142:105794. doi: 10.1016/j.jmbbm.2023.105794. Online ahead of print.ABSTRACTThe aim of this study was to assess if the finishing/polishing of the bonding surface of lithium disilicate ceramic, prior to or after crystallization, would affect the fatigue behavior of a bonded restorations. For this, lithium disilicate ceramic (IPS e.max CAD) discs (n = 15) were milled and randomly divided into 3 groups: CAD-CAM group which remained untouched; PRE group which received a finishing/polishing protocol (OptraFine system) prior to its crystallization; and POST group, which received the treatme...
Source: Journal of the Mechanical Behavior of Biomedical Materials - April 10, 2023 Category: Materials Science Authors: Rafaela Oliveira Pilecco Camila Pauleski Zucuni Ana Beatriz Gomes de Carvalho Guilherme de Siqueira Ferreira Anzaloni Saavedra Renata Marques de Melo Marinho Gabriel Kalil Rocha Pereira Luiz Felipe Valandro Source Type: research

How does the occlusal contact region influence the mechanical fatigue performance and fracture region of monolithic lithium disilicate ceramic crowns?
CONCLUSION: Load application on distinct occlusal contact regions affects the stress distribution pattern and consequently the mechanical fatigue performance and fracture region of the monolithic lithium disilicate ceramic crowns. A combination of loading at distinct regions is recommended to promote better evaluation of the fatigue behavior of a restored set.PMID:36878081 | DOI:10.1016/j.jmbbm.2023.105746
Source: Journal of the Mechanical Behavior of Biomedical Materials - March 6, 2023 Category: Materials Science Authors: Helder Callegaro Velho Lucas Saldanha da Rosa Kiara Serafini Dapieve Alexandre Luiz Souto Borges Gabriel Kalil Rocha Pereira Andressa Borin Venturini Luiz Felipe Valandro Source Type: research

Pages: 1  2  3  4  5  6