Ricardo Faria Ribeiro

• Abstract

  The use of implants for rehabilitation of totally or partially edentulous patients has been increasing and with great success rate. However, several studies indicate that there is bi-directional bacterial microleakage through the implant/abutment interface and this may compromise the long-term success of implants. The aim of the present study will be to evaluate the passage of bacterial s…

  Study of different internal implant/abutment connections: stress transfer and bacterial sealing capability under static and post thermomechanical loading conditions, AP.R

• Abstract

  Implant systems come with the aesthetic development, offering ceramic components for implant prostheses, whites, who favour the attainment of the desired pink aesthetics, in detriment of metal components, which can be viewed by transparency in patients with thin gingival tissue. Prosthetic abutments and ceramic copings have been obtained by means of CAD/CAM technology allowing to quickly …

  Surface characterization of Y-TZP after acid treatment, silicatization and nanoparticles film of Si-ZrO2 and adhesion evaluation after treatments, single/combined, for CAD/CAM abutments/crowns in use simulation and thermomechanical accelerated fatigue, AP.R

• Abstract

  Considering the increasing aesthetic demands, the development of zirconia and use technology CAD/CAM this study aims to evaluate the internal and marginal adaptation, resistance to fracture after thermo-cycling mechanical and implants tensions by digital image correlation in partial prosthesis implant fixed with pillars and copings zirconia with diferente CAD/CAM systems compared to the c…

  Evaluation of marginal and internal fit, fracture resistance after thermomechanical cycling and of tensions on implants by digital image correlation on fixed partial prostheses over implants with Zr abutaments and copings by different CAD/CAM systems, AP.R

(Only some records are available in English at this moment)

• Abstract

  The objective of this study is to evaluate the wear, color change, microhardness, survival of resin crowns for long-lasting 3D printing, made with surface characterization or just finishing, on implants with different prosthetic connections that share the same abutment model, evaluating , also, the loss of torque caused after thermomechanical cycling. Test specimens simulating lower first…

  How characterization and polishing influence, in the long term, the properties of two 3D printed resins as crowns on implants: evaluation of color, microhardness, wear resistance and durability., BP.IC

• Abstract

  Success in implantology is achieved by the combination of biomechanical factors and has been observed increasing in researches about dental implants, involving different materials, shapes, lengths, diameters and techniques. This study will compare three diameters of dental implants (4.3 mm, 3.75 mm and 3.5 mm), with internal tri-channel connection triangle (Bioneck), and evaluate the corr…

  "Evaluation of the effect of diameter on the insertion torque and resistance to fracture of tri-channel implants"., BP.DR

• Abstract

  The use of high-strength zirconium oxide ceramics by means of CAD-CAM has been the focus for both conventional and restorative approaches to manufacture components for implanted devices. The aim of this study is to evaluate the bond strength of high-strength zirconium oxide ceramics after different surface treatments and to evaluate the mechanical behavior of ceramic abutments and crowns …

  Mechanical behavior, bond strength and reliability of YTZP abutments and crowns processed by CAD-CAM: the role of surface treatments, BP.DR

(Only some records are available in English at this moment)