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Dental displacement in complete dentures influenced by different flask types an...
Caetano,Conrado Reinoldes; Caldas,Ricardo Armini; Presotto,Anna Gabriella Camacho; Barão,Valentim Adelino Ricardo; Bacchi,AtaísAbstract This study evaluated the dental displacement in dentures included in different flasks and processed by the Australian cycle modified or by microwave. Metal pins were placed on the teeth as reference for measurements: a) Incisal edge of maxillary and mandibular central incisors, buccal cusp of maxillary and mandibular vestibular first premolars, and mesiobuccal maxillary and mandibular cusps of second m...
Implant Volume Loss, Misfit, Screw Loosening, and Stress In Custom Titanium and...
Barbosa Jr,Sales Antônio; Bacchi,Ataís; Barão,Valentim Adelino Ricardo; Silva-Sousa,Yara Teresinha Corrêa; Bruniera,João Felipe; Caldas,Ricardo ArminiAbstract The aim of this study was to verify the effect of the implant volume loss, vertical misfit between abutment and prosthetic platform, prosthetic screw loosening torque, and screw stress distribution in titanium and zirconia abutments. Ten CAD/CAM system custom abutments of each material were milled and attached to the titanium implants. The implant volume loss was evaluated by microtomography, the verti...
Strategies for Potential Toughening of Acrylic Denture Bases Polymerized With M...
Consani,Rafael Leonardo Xediek; Paula,Andreia Bolzan de; Fugolin,Ana Paula Piovezan; Pfeifer,Carmem S.Abstract Thiourethane additives have been shown to improve properties in several dental polymer applications. The aim of this study was to verify the effect of the addition of thiourethane oligomers and acrylamide or isobornyl-based plasticizers on the physical properties of the denture base acrylic resin polymerized with microwaves. Thiourethane oligomer (TU) was synthetized and added to microwaved acrylic res...
Treatment of Resorbed Mandibles with Titanium Plate and Immediate Implant-Suppo...
Fabris,Vinicius; Reginato,Vagner Flavio; Smaniotto,Carolina; Bacchi,Atais; Consani,Rafael Leonardo XediekAbstract Severely resorbed mandibles with only cortical bone remaining can fracture during or after implant placement. This case series presents a technique to reduce the risk or the consequences of mandibular fracture. Seven patients with only cortical mandibular bone remaining were treated with the fixation of a titanium plate in the frontal surface previously to implant placement, during the same surgical pr...
Implant Inclination and Horizontal Misfit in Metallic Bar Framework of Overdent...
Caldas,Ricardo Armini; Pfeifer,Carmem Silvia Costa; Bacchi,Ataís; Santos,Mateus Bertolini Fernandes dos; Reginato,Vagner FlávioAbstract The aim of this study was to evaluate by three-dimensional finite element analysis (3D-FEA) the biomechanics involved in bar-framework system for overdentures. The studied factors were latero-lateral angulation in the right implant (-10, -5, 0, 5 and 10 degrees), and different bar cross-sections (circular, Hader and oval) presenting horizontal misfits (50 or 150 µm) on the opposite implant. Positive an...
Characterization of Residual Stresses in Veneering Ceramics for Prostheses with...
Reginato,Vagner Flávio; Kemmoku,Daniel Takanori; Caldas¹,Ricardo Armini; Bacchi³,Ataís; Pfeifer,Carmem Silvia; Consani,Rafael Leonardo XediekAbstract The aim of this study was to evaluate the influence of the coefficient of thermal expansion (CTE or α) and glass transition temperature (Tg) of three veneering ceramics used with zirconia frameworks of full-arch fixed prostheses. The generation of residual stresses and linear contraction after the simulation of the cooling process and mechanical loading were measured. The analysis was based on the fini...
Effect of Polymerization Cycles on Gloss, Roughness, Hardness and Impact Streng...
Consani,Rafael Leonardo Xediek; Folli,Bianca L.; Nogueira,Moises C. F.; Correr,Americo Bortolazzo; Mesquita,Marcelo F.Abstract The aim of this study was to evaluate the conventional and boiled polymerization cycles on gloss, roughness, hardness and impact strength of acrylic resins. Samples were made for each Classico and QC-20 materials (n=10) in dental stone molds obtained from rectangular metallic matrices embedded in metallic flasks. The powder-liquid ratio and manipulation of the acrylic resins' were accomplished accordin...
Repair Strength in Simulated Restorations of Methacrylate- or Silorane-Based Co...
Consani,Rafael Leonardo Xediek; Marinho,Tatiane; Bacchi,Atais; Caldas,Ricardo Armini; Feitosa,Victor Pinheiro; Pfeifer,Carmem SilviaAbstract The study verified the bond strength in simulated dental restorations of silorane- or methacrylate-based composites repaired with methacrylate-based composite. Methacrylate- (P60) or silorane-based (P90) composites were used associated with adhesive (Adper Single Bond 2). Twenty-four hemi-hourglass-shaped samples were repaired with each composite (n=12). Samples were divided according to groups: G1= P6...
Chemical analysis and Vickers hardness of orthodontic mini-implants
Feitoza,Christiane Cavalcante; Oliveira,Guilherme José Pimentel Lopes de; Consani,Rafael Leonardo Xediek; Boeck,Eloisa MarcantonioOrthodontic mini-implants are used in clinical practice to provide efficient and aesthetically-pleasing anchorage. AIM: To evaluate the hardness Vickers hardness and chemical composition of mini-implant titanium alloys from five commercial brands. METHODS: Thirty self-drilling mini-implants, six each from the following commercial brands, were used: Neodent NEO, Morelli MOR, Sin SIN, Conexão CON, and Rocky Mount...
Stress analysis of different configurations of 3 implants to support a fixed pr...
Silva-Neto,João Paulo da; Pimentel,Marcele Jardim; Neves,Flávio Domingues das; Consani,Rafael Leonardo Xediek; Santos,Mateus Bertolini Fernandes dosThis study's aims was to evaluate the stress distribution in a mandibular implant-supported prosthesis and peri-implant bone considering implant quantity, diameter and position using linear 3-D finite element analysis. Models of an anterior jaw comprised 4 groups according to implant quantity, diameter, and position: control group C, 5 regular implants; R, 3 regular implants; W, 3 wide implants; and DTR, 3 regu...