Resistance to Fracture of Lithium Disilicate Feldspathic Restorations Manufactured Using a CAD/CAM System and Crystallized with Different Thermal Units and Programs

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 wi...

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Published in:Materials 2021-06, Vol.14 (12), p.3215
Main Authors: Abad-Coronel, Cristian, Ordoñez Balladares, Andrea, Fajardo, Jorge I., Martín Biedma, Benjamín José
Format: Article
Language:English
Subjects:
CAD/CAM
CAM
Computer aided manufacturing
Crystallization
Dental materials
Design
Fracture toughness
Hypotheses
Laboratories
Lithium
Manufacturers
Manufacturing
Mechanical properties
Ovens
Software
Statistical analysis
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creator Abad-Coronel, Cristian
Ordoñez Balladares, Andrea
Fajardo, Jorge I.
Martín Biedma, Benjamín José
description 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.
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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 &lt; 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.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma14123215</identifier><identifier>PMID: 34200881</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>CAD/CAM ; CAM ; Computer aided manufacturing ; Crystallization ; Dental materials ; Design ; Fracture toughness ; Hypotheses ; Laboratories ; Lithium ; Manufacturers ; Manufacturing ; Mechanical properties ; Ovens ; Software ; Statistical analysis</subject><ispartof>Materials, 2021-06, Vol.14 (12), p.3215</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. 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subjects CAD/CAM
CAM
Computer aided manufacturing
Crystallization
Dental materials
Design
Fracture toughness
Hypotheses
Laboratories
Lithium
Manufacturers
Manufacturing
Mechanical properties
Ovens
Software
Statistical analysis
title Resistance to Fracture of Lithium Disilicate Feldspathic Restorations Manufactured Using a CAD/CAM System and Crystallized with Different Thermal Units and Programs
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