Fracture of abutment screw supporting a cemented implant-retained prosthesis with external hexagon connection: a case report with sem evaluation

Authors

  • Mariana Diniz Bisi Santos University Santo Amaro; Department of Implantology
  • Arthur Braga Pfeifer University Santo Amaro; Department of Implantology
  • Marcos Rogério Pupo Silva University Santo Amaro; Department of Implantology
  • Claudio Luiz Sendyk University of São Paulo; Department of Prosthodontics
  • Wilson Roberto Sendyk University Santo Amaro; Department of Implantology

DOI:

https://doi.org/10.1590/S1678-77572007000200015

Keywords:

Osseointegrated implants, Dental abutments, Fractures, Prostheses and implants

Abstract

One of the causes of implant failures in cemented implant-retained prostheses is the fracture of abutment screw or UCLA abutment. This article reports a case of simultaneous fracture of two UCLA abutments screws occurring in an implant-supported prosthesis placed in the mandibular molar region. The fractured structures were examined under scanning electron microscopy to investigate the probable causes of the failure, which were not related to failures on materials or fabrication of the screws, but rather were due to shear forces. The misfit in cemented prostheses may be the most likely cause of shear force generation.

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Published

2007-04-01

Issue

Vol. 15 No. 2 (2007)

Section

Original Articles

License

Todo o conteúdo do periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons do tipo atribuição CC-BY.

 

 

How to Cite

Fracture of abutment screw supporting a cemented implant-retained prosthesis with external hexagon connection: a case report with sem evaluation . (2007). Journal of Applied Oral Science, 15(2), 148-151. https://doi.org/10.1590/S1678-77572007000200015