18 documents found, page 1 of 2
Different biomechanical preparation protocols on the penetration and bond stren...
Macedo,Luciana Martins Domingues de; Silva-Sousa,Yara Teresinha Corrêa; Olivato Junior,Orestes; Baltazar,Adrielle FracaroliAbstract The aim of this study was to evaluate the influence of different instruments and mechanisms of agitation of the irrigating solution on the penetration by confocal laser scanning microscopy (CLSM), and the bond strength (BS) of the filling material to the dentin by push-out test. Human premolars were distributed in two experimental groups (n=30), according to the instrumentation system: ProTaper Next (P...
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...
Green Synthesis, Characterization and Antimicrobial Evaluation of Silver Nanopa...
Bruniera,João Felipe Bonatto; Gabriel-Silva,Leonado; Goulart,Rafael Silva; Silva-Sousa,Yara Teresinha Corrêa; Lara,Marilisa GuimarãesAbstract Green chemistry has been applied in different areas due to the growing demands for renewable processes and one of them is nanotechnology. The aim of this study was to characterize a formulation containing silver nanoparticles (AgNPs) produced by a green synthesis and to evaluate its antimicrobial activity. The formulation will be used as an intracanal dressing exploiting the AgNPs’ antimicrobial proper...
Restorative Possibilities Using Zirconia Ceramics for Single Crowns
Felberg,Rodrigo Volz; Bassani,Rafaela; Pereira,Gabriel Kalil Rocha; Bacchi,Ataís; Silva-Sousa,Yara Teresinha Corrêa; Gomes,Erica AlvesAbstract Two clinical cases are presented to explore technical differences and discusses the advantages and disadvantages of using veneered or monolithic zirconia to manufacture posterior single crowns. The first case describes the clinical steps in manufacturing a monolithic crown on a mandibular left second premolar using high translucency zirconia. It shows the use of a conservative tooth preparation based o...
Effect of sonic and ultrasonic activation on physicochemical properties of root...
Lopes,Fabiane Carneiro; Zangirolami,Caio; Mazzi-Chaves,Jardel Francisco; Silva-Sousa,Alice Corrêa; Crozeta,Bruno MonguilhottAbstract Objective: To evaluate the effect of ultrasonic and sonic activation on physicochemical properties of AH Plus, MTA Fillapex, ADSeal, GuttaFlow Bioseal, and GuttaFlow 2 sealers. Methodology: Three experimental groups were formed: no activation (NA), ultrasonic activation (UA), and sonic activation (SA). The sealers were manipulated according to the manufacturers’ instructions. A 3-mL syringe was adapted...
Push-out bond strength of different tricalcium silicate-based filling materials...
Stefaneli Marques,Jorge Henrique; Silva-Sousa,Yara Teresinha Corrêa; Rached-Júnior,Fuad Jacob Abi; Macedo,Luciana Martins Domingues deAbstract: The aim of this study was to evaluate the bond strength of different triccalcium silicate cements to retrograde cavity using a push out test. Thirty maxillary central incisors were shaped using #80 hand files and sectioned transversally. Root slices were obtained from the apical 4 mm after eliminating the apical extremity. The specimens were embedded in acrylic resin and positioned at 45° to the horiz...
Cytotoxicity Evaluation of Root Canal Sealers Using an In Vitro Experimental Mo...
Teixeira,Ligia; Basso,Fernanda Gonçalves; Hebling,Josimeri; Costa,Carlos Alberto de Souza; Mori,Graziela Garrido; Silva-Sousa,Yara Teresinha CorrêaAbstract The aim of the present study was to evaluate the cytotoxicity of root canal sealers under conditions closely resembling a clinical reality. A primary human fibroblast cell line was seeded in 24-well acrylic plates with Dulbecco’s modified Eagle’s medium supplemented with 10% serum fetal bovine (SFB) and incubated for 24 h. Root canals from premolars were filled and individually attached to nylon device...
Evaluation of Stress Distribution in Endodontically Weakened Teeth Restored wit...
Moris,Izabela C. M.; Moscardini,Carolina Alves; Moura,Luana Kelle Batista; Silva-Sousa,Yara Teresinha Corrêa; Gomes,Erica AlvesAbstract This study evaluated the stress distribution in endodontically treated teeth, weakened (W) or not weakened (NW), restored with different materials of prosthetic crown using 3D-FEA. Models of a maxillary canine were constructed based on micro-CT images and divided into the groups: G1 (control) - sound tooth; G2 to G7 - endodontically treated teeth restored with glass fiber post (GFP); which G2 to G4 sim...
Performance of Three Single Instrument Systems in the Preparation of Long Oval ...
Coelho,Beatriz Serrato; Amaral,Rodrigo Otavio Jatahy Ferreira do; Leonardi,Denise Piotto; Marques-da-Silva,Bruno; Silva-Sousa,Yara Teresinha CorrêaAbstract This study aimed to evaluate the performance of the Wave One, Easy ProDesign Logic and One Shape systems in the preparation of long oval root canals. Forty-two mandibular incisors were randomized into three groups: Group I, Wave One Primary (WO) (#25.08); Group II, Easy ProDesign Logic (EPL) (#25.06) and Group III, One Shape (OS) (#25.06). Micro-computed tomography scans were obtained pre- and post-pre...
Influence of Sealer and Light-Curing Units on Push-Out Bond Strength Of Composi...
Lima,Adriana Corrêa de; Rached-Junior,Fuad Jacob; Faria,Natália Spadini de; Messias,Danielle Cristine; Chaves,Carolina de Andrade LimaAbstract The aim of this study was to assess the influence of sealer and light-curing unit on regional bond strength of resin composite to the weakened roots. Ninety roots of incisors were experimentally weakened, subjected to biomechanical preparation and filled with either Endofill, AH Plus or MTA Fillapex The roots were desobturated e reinforced with resin composite and fiber post light-activated with one of...