TY - JOUR
T1 - Resistance to fracture of lithium disilicate feldspathic restorations manufactured using a cad/cam system and crystallized with different thermal units and programs
AU - Abad-Coronel, Cristian
AU - Balladares, Andrea Ordoñez
AU - Fajardo, Jorge I.
AU - Biedma, Benjamín José Martín
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/6/2
Y1 - 2021/6/2
N2 - The aim of this study was to determine the resistance to fracture of feldspathic restorations with lithium disilicate and crystallized with different ovens and programs. Methods: Sixty monolithic restorations (LD) (EMAX CAD™ LT, Ivoclar-Vivadent™) were designed with the same parameters and milled with a CAD/CAM system (CEREC SW 5.1, CEREC MCXL, Dentsply-Sirona™, Bensheim). Each restoration was randomly assigned by randomization software (RANDNUM) to one of the three groups: a) (NF) Oven P310 (Ivoclar, Vivadent) normal crystallization program, b) (FF) Ivoclar P310 oven (Ivoclar-Vivadent™) rapid crystallization program, or c) (SF) SpeedFire oven (Dentsply-Sirona™). Results: There were statistically significant differences between the groups (ANOVA, p <0.05). The NF and FF groups showed the highest values of resistance to fracture, with statistically significant differences with the SF group. Conclusions: Using a furnace from the same dental company with predetermined programs from the material manufacturer, as well as using a predetermined program for rapid crystallization, has no effect on fracture resistance, and would save clinical time when performing ceramic restorations with lithium disilicate, while keeping their mechanical properties.
AB - The aim of this study was to determine the resistance to fracture of feldspathic restorations with lithium disilicate and crystallized with different ovens and programs. Methods: Sixty monolithic restorations (LD) (EMAX CAD™ LT, Ivoclar-Vivadent™) were designed with the same parameters and milled with a CAD/CAM system (CEREC SW 5.1, CEREC MCXL, Dentsply-Sirona™, Bensheim). Each restoration was randomly assigned by randomization software (RANDNUM) to one of the three groups: a) (NF) Oven P310 (Ivoclar, Vivadent) normal crystallization program, b) (FF) Ivoclar P310 oven (Ivoclar-Vivadent™) rapid crystallization program, or c) (SF) SpeedFire oven (Dentsply-Sirona™). Results: There were statistically significant differences between the groups (ANOVA, p <0.05). The NF and FF groups showed the highest values of resistance to fracture, with statistically significant differences with the SF group. Conclusions: Using a furnace from the same dental company with predetermined programs from the material manufacturer, as well as using a predetermined program for rapid crystallization, has no effect on fracture resistance, and would save clinical time when performing ceramic restorations with lithium disilicate, while keeping their mechanical properties.
KW - CAD/CAM materials
KW - Crystallization
KW - Fracture
KW - Lithium disilicate
UR - https://repositorio.uasb.edu.ec/handle/10644/7211
U2 - 10.3390/ma14123215
DO - 10.3390/ma14123215
M3 - Artículo
AN - SCOPUS:85108459870
SN - 1996-1944
VL - 14
JO - Materials
JF - Materials
IS - 12
M1 - 3215
ER -