Effect of etching time and resin bond on the flexural strength of IPS e.max Press glass ceramic

Influence of core thickness and artificial aging on the biaxial flexural strength of different all-ceramic materials: An <i>in-vitro</i> study

“…Clinically, an appropriate strength characteristics is an important aspect of dental restoration. According to previous studies, the long-term strength properties of all-ceramic restorations depend upon several factors, such as fabrication type [14][15][16][17] , laboratory procedures [18][19][20][21] , core or veneer thickness 4,7,22) , fatique resistance 23) , luting procedure 24,25) , and aging 11,14,[26][27][28] . Thus, it is important to determine the mechanical behavior of this category of dental materials in vitro.…”

Analysis of flexural strength and contact pressure after simulated chairside adjustment of pressed lithium disilicate glass-ceramic

“…18 Although several studies have considered the effect of etching or bonding on ceramic materials, none have looked at simulated laboratory or clinical adjustments in a clinically validated test. 19,20,21,22,23 The authors are unaware of studies that have investigated the effect of adjustment size on the intaglio surface of LDGC and its effect on strength. Studies that have evaluated after-adjustment repair protocols and their effect on load-to-failure by using clinically validated methods are lacking.24, 25 Therefore, this study considered 4 null hypotheses: no difference will be found in the strength of diamond-adjusted and repaired IPS e.max Press (Ivoclar Vivadent AG) restorations compared with the nonadjusted IPS e.max Press when specimens are in the devested condition; no difference will be found in the contact pressure of diamond-adjusted and "repaired" IPS e.max Press restorations compared with the nonadjusted IPS e.max Press when specimens are in the devested condition; no difference will be found in the strength of diamond-adjusted and repaired" IPS e.max Press restorations compared with the nonadjusted IPS e.max Press when specimens are in the natural glaze condition; and no difference will be found in the contact pressure of diamond-adjusted and repaired IPS e.max Press restorations compared with the nonadjusted IPS e.max Press when specimens are in the natural glaze condition.…”

“…19 However, when LDGC is etched and bonded, the strength of the specimen was improved. 20 Bonding with resin cement may improve the performance of adjusted ceramic materials by healing defects and interfering with crack propagation. 20,21,22 In the present study, simply cementing damaged specimens (1PG, 2PG) without a glazing treatment resulted in Weibull distributions that were significantly different from the controls (1PC, 2PC) in the before-glazing and after-glazing contact pressure tests.…”

Influence of different treatments of the ceramic surface and thermal cycling on the bond strength of brackets to ceramic

“…HF acid is an efficient surface modification agent that is capable of dissolving the glassy ceramic matrix, increased the roughness 6 , contact surface and wettability 7,8 , promoting higher bond between bonding materials and ceramics [9][10][11] . The application of hydrofluoric acid followed by a silane solution have been used prior to bonding glass ceramic to increase the bond strength and durability between brackets and ceramic surface 3,12,13 or luting glass ceramic restorations 12 .…”