Influence of High-Pressure Polymerization on Mechanical Properties of Denture Base Resins
José Becerra MSc,PhD
Departamento de Física, Instituto de Ciencias Básicas, Universidad Técnica de Manabí, Portoviejo, Ecuador
Dental Biomaterials Research Unit (d-BRU), Institute of Dentistry, University of Liège (ULg), Liège, Belgium
Search for more papers by this authorAmélie Mainjot DDS, MSc,PhD
Dental Biomaterials Research Unit (d-BRU), Institute of Dentistry, University of Liège (ULg), Liège, Belgium
Department of Fixed Prosthodontics, Institute of Dentistry, University of Liège Hospital (CHU), Liège, Belgium
Search for more papers by this authorOlivier Hüe DDS, MSc PhD
CNRS, EFS, ADES, Aix Marseille University, Marseille, France
Search for more papers by this authorCorresponding Author
Jean-François Nguyen DDS, MSc, PhD
Department of Prosthodontics UFR d'Odontologie, Université Paris Diderot, Paris, France
Institut de Recherche de Chimie Paris, Chimie ParisTech-CNRS, PSL Research University, Paris, France
Correspondence
Dr Jean-François Nguyen, Department of Prosthodontics UFR d'Odontologie
Université Paris Diderot, 5 Rue Garancière 75006 Paris, France.
E-mail: [email protected]
Search for more papers by this authorJosé Becerra MSc,PhD
Departamento de Física, Instituto de Ciencias Básicas, Universidad Técnica de Manabí, Portoviejo, Ecuador
Dental Biomaterials Research Unit (d-BRU), Institute of Dentistry, University of Liège (ULg), Liège, Belgium
Search for more papers by this authorAmélie Mainjot DDS, MSc,PhD
Dental Biomaterials Research Unit (d-BRU), Institute of Dentistry, University of Liège (ULg), Liège, Belgium
Department of Fixed Prosthodontics, Institute of Dentistry, University of Liège Hospital (CHU), Liège, Belgium
Search for more papers by this authorOlivier Hüe DDS, MSc PhD
CNRS, EFS, ADES, Aix Marseille University, Marseille, France
Search for more papers by this authorCorresponding Author
Jean-François Nguyen DDS, MSc, PhD
Department of Prosthodontics UFR d'Odontologie, Université Paris Diderot, Paris, France
Institut de Recherche de Chimie Paris, Chimie ParisTech-CNRS, PSL Research University, Paris, France
Correspondence
Dr Jean-François Nguyen, Department of Prosthodontics UFR d'Odontologie
Université Paris Diderot, 5 Rue Garancière 75006 Paris, France.
E-mail: [email protected]
Search for more papers by this authorThe authors declare no conflicts of interest.
Abstract
Purpose
The purpose of this study was to study the influence of high-pressure (HP) polymerization on the mechanical properties of denture base PMMA resins compared with conventional thermopolymerization and PMMA discs for digital dentures.
Materials and Methods
Three groups of blocks were prepared: Probase Hot (Ivoclar Vivadent, Lichtenstein) conventionally heat polymerized at 100°C, Probase Hot heat polymerized at 100°C under HP (200 MPa) and Ivobase CAD (Ivoclar Vivadent, Lichtenstein). Samples for mechanical/physical (n = 30) and samples for viscoelastic (n = 10) characterizations were cut from the blocks. Flexural strength (σf), elastic modulus (Ef), hardness, density (ρ), flexural deformation at maximal flexural stress, flexural load energy (Ur) and viscoelastic properties (E’, E’’, Tanδ, Tg) were analyzed using one-way ANOVA (α = 0.05), Scheffé multiple means comparisons (α = 0.05) and Weibull statistics (for σf). SEM images of the fractured surfaces were obtained.
Results
Ef, E’, E’’ and density of HP polymerized Probase hot were significantly higher than conventional heat polymerized Probase Hot, whereas Tg was significantly lower and σf, Tanδ, hardness, flexural deformation at maximal flexural stress, Ur were not significantly different. The highest values for σf, flexural deformation at maximal flexural stress, Ur and Weibull modulus were obtained with Ivobase CAD.
Conclusion
HP polymerization does not significantly increase the mechanical properties of denture base resins.
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