FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Santos, Mariana Diniz Bisi, Pfeifer, Arthur Braga, Silva, Marcos Rogério Pupo, Sendyk, Claudio Luiz, Sendyk, WIlson Roberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Faculdade de Odontologia de Bauru da Universidade de São Paulo 2007
Materias:
Original Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327248/
https://www.ncbi.nlm.nih.gov/pubmed/19089120
http://dx.doi.org/10.1590/S1678-77572007000200015
_version_ 1782357042346852352
author Santos, Mariana Diniz Bisi
Pfeifer, Arthur Braga
Silva, Marcos Rogério Pupo
Sendyk, Claudio Luiz
Sendyk, WIlson Roberto
author_facet Santos, Mariana Diniz Bisi
Pfeifer, Arthur Braga
Silva, Marcos Rogério Pupo
Sendyk, Claudio Luiz
Sendyk, WIlson Roberto
author_sort Santos, Mariana Diniz Bisi
collection PubMed
description 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.
format Online
Article
Text
id pubmed-4327248
institution National Center for Biotechnology Information
language English
publishDate 2007
publisher Faculdade de Odontologia de Bauru da Universidade de São Paulo
record_format MEDLINE/PubMed
spelling pubmed-43272482015-04-22 FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION Santos, Mariana Diniz Bisi Pfeifer, Arthur Braga Silva, Marcos Rogério Pupo Sendyk, Claudio Luiz Sendyk, WIlson Roberto J Appl Oral Sci Original Article 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. Faculdade de Odontologia de Bauru da Universidade de São Paulo 2007-04 /pmc/articles/PMC4327248/ /pubmed/19089120 http://dx.doi.org/10.1590/S1678-77572007000200015 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Santos, Mariana Diniz Bisi
Pfeifer, Arthur Braga
Silva, Marcos Rogério Pupo
Sendyk, Claudio Luiz
Sendyk, WIlson Roberto
FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title_full FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title_fullStr FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title_full_unstemmed FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title_short FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
title_sort fracture of abutment screw supporting a cemented implant-retained prosthesis with external hexagon connection: a case report with sem evaluation
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327248/
https://www.ncbi.nlm.nih.gov/pubmed/19089120
http://dx.doi.org/10.1590/S1678-77572007000200015
work_keys_str_mv AT santosmarianadinizbisi fractureofabutmentscrewsupportingacementedimplantretainedprosthesiswithexternalhexagonconnectionacasereportwithsemevaluation
AT pfeiferarthurbraga fractureofabutmentscrewsupportingacementedimplantretainedprosthesiswithexternalhexagonconnectionacasereportwithsemevaluation
AT silvamarcosrogeriopupo fractureofabutmentscrewsupportingacementedimplantretainedprosthesiswithexternalhexagonconnectionacasereportwithsemevaluation
AT sendykclaudioluiz fractureofabutmentscrewsupportingacementedimplantretainedprosthesiswithexternalhexagonconnectionacasereportwithsemevaluation
AT sendykwilsonroberto fractureofabutmentscrewsupportingacementedimplantretainedprosthesiswithexternalhexagonconnectionacasereportwithsemevaluation

Ejemplares similares