Influence of abutment and connection type on implant-abutment connection rigidity: an in vitro study

    Objectives: To evaluate the effects of the abutment material and the connection type on the implant-abutment connection rigidity. Methods: The study evaluated eighteen implants with three different types of connections: external-hexagon, tri-channel, and conical connection. Half of the implants were connected to ti...

  • Teresa Almeida Mendes, Luís Miguel Vilhena, Jaime Portugal, João Caramês, Amílcar Lopes Ramalho, Luis Pires Lopes
  • 134-140
  • Original research
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Comparison of geometric design, metallurgical features and mechanical behavior of ProTaper Gold SX and two replica-like instruments

    Objectives: To assess the characteristics, performance, and safety of ProTaper Gold SX (PTG SX) replica-like instruments. Methods: A multimethod research involving the assessment of geometric design (macro and through scanning electron microscope), Ti/Ni proportions (energy-dispersive X-ray spectroscopy), phase tra...

  • Jorge N.R. Martins, Emmanuel J.N.L. Silva, Duarte Marques, Sofia Arantes-Oliveira, João Caramês, Marco Aurélio Versiani
  • 1-8
  • Original research
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Cyclic fatigue resistance of ProTaper Gold and comparison with ProTaper Universal instruments

    Objectives: The purpose of this study was to characterize the cyclic fatigue resistance of the ProTaper Gold system and to compare it with the fatigue resistance of ProTaper Universal system. Methods: A mechanical device simulate a root canal system with a radius of curvature of 4.7 mm and an angle of curvature of ...

  • Fátima Pereira, Rui F. Martins, António Ginjeira
  • 75-79
  • Original research
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Reconstrução de Maxila Atrófica utilizando Osso Autogéneo e Malha de Titânio para Posterior Reabilitação com Implantes – Caso Clínico

    Várias técnicas têm sido desenvolvidas para aumentar o volume ósseo do rebordo alveolar e possibilitar a reabilitação com implantes. A utilização de malhas de titânio associada a enxerto ósseo autógeno é uma técnica que vem sendo utilizada em...

  • André Luís Vieira Cortez, Greison Oliveira Rabelo, Renato Mazzonetto
  • 163-167
  • Caso ClÍnico
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Torsional Failure Characteristics of a NiTi file based on a Case Report

    A instrumentação mecanizada com limas de níquel-titânio é usada mundialmente, sendo a separação e fractura destes instrumentos considerada uma grande preocupação. São documentados dois tipos de fracturas: por fadiga cíclica ou por fractura por torção. U...

  • Jorge N. R. Martins, Joseph DiBernardo
  • 85-89
  • Caso ClÍnico
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