FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
Identifieur interne : 006729 ( Main/Exploration ); précédent : 006728; suivant : 006730FRACTURE OF ABUTMENT SCREW SUPPORTING A CEMENTED IMPLANT-RETAINED PROSTHESIS WITH EXTERNAL HEXAGON CONNECTION: A CASE REPORT WITH SEM EVALUATION
Auteurs : Mariana Diniz Bisi Santos [Brésil] ; Arthur Braga Pfeifer [Brésil] ; Marcos Rogério Pupo Silva [Brésil] ; Claudio Luiz Sendyk [Brésil] ; Wilson Roberto Sendyk [Brésil]Source :
- Journal of Applied Oral Science [ 1678-7757 ] ; 2007.
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.
Url:
DOI: 10.1590/S1678-77572007000200015
PubMed: 19089120
PubMed Central: 4327248
Affiliations:
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EVALUATION</title><author><name sortKey="Santos, Mariana Diniz Bisi" sort="Santos, Mariana Diniz Bisi" uniqKey="Santos M" first="Mariana Diniz Bisi" last="Santos">Mariana Diniz Bisi Santos</name><affiliation wicri:level="3"><nlm:aff id="aff01">DDS, MsC, Graduate student, Department of Implantology, University Santo Amaro, São Paulo, São Paulo, Brazil</nlm:aff><country xml:lang="fr">Brésil</country><wicri:regionArea>DDS, MsC, Graduate student, Department of Implantology, University Santo Amaro, São Paulo, São Paulo</wicri:regionArea><placeName><settlement type="city">São Paulo</settlement><region type="state">État de São Paulo</region></placeName></affiliation></author><author><name sortKey="Pfeifer, Arthur Braga" sort="Pfeifer, Arthur Braga" uniqKey="Pfeifer A" first="Arthur Braga" last="Pfeifer">Arthur Braga Pfeifer</name><affiliation wicri:level="3"><nlm:aff id="aff01">DDS, MsC, Graduate student, Department of Implantology, University Santo Amaro, São Paulo, São Paulo, 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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.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Adell, R" uniqKey="Adell R">R Adell</name></author><author><name sortKey="Lekholm, U" uniqKey="Lekholm U">U Lekholm</name></author><author><name sortKey="Rockler, B" uniqKey="Rockler B">B Rockler</name></author><author><name sortKey="Branemark, Pi" uniqKey="Branemark P">PI Branemark</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Assif, D" uniqKey="Assif D">D Assif</name></author><author><name sortKey="Marshak, B" uniqKey="Marshak B">B Marshak</name></author><author><name sortKey="Schmidt, A" uniqKey="Schmidt A">A Schmidt</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Bassit, R" uniqKey="Bassit R">R Bassit</name></author><author><name sortKey="Lindstrom, H" uniqKey="Lindstrom H">H Lindstrom</name></author><author><name 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Sendyk</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Setz, J" uniqKey="Setz J">J Setz</name></author><author><name sortKey="Kramer, A" uniqKey="Kramer A">A Kramer</name></author><author><name sortKey="Benzing, U" uniqKey="Benzing U">U Benzing</name></author><author><name sortKey="Weber, H" uniqKey="Weber H">H Weber</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Taylor, Td" uniqKey="Taylor T">TD Taylor</name></author><author><name sortKey="Agar, Jr" uniqKey="Agar J">JR Agar</name></author><author><name sortKey="Vogiatzi, T" uniqKey="Vogiatzi T">T Vogiatzi</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Brésil</li></country><region><li>État de São Paulo</li></region><settlement><li>São Paulo</li></settlement><orgName><li>Université de São Paulo</li></orgName></list><tree><country name="Brésil"><region name="État de São Paulo"><name sortKey="Santos, Mariana Diniz Bisi" sort="Santos, Mariana Diniz Bisi" uniqKey="Santos M" first="Mariana Diniz Bisi" last="Santos">Mariana Diniz Bisi Santos</name></region><name sortKey="Pfeifer, Arthur Braga" sort="Pfeifer, Arthur Braga" uniqKey="Pfeifer A" first="Arthur Braga" last="Pfeifer">Arthur Braga Pfeifer</name><name sortKey="Sendyk, Claudio Luiz" sort="Sendyk, Claudio Luiz" uniqKey="Sendyk C" first="Claudio Luiz" last="Sendyk">Claudio Luiz Sendyk</name><name sortKey="Sendyk, Wilson Roberto" sort="Sendyk, Wilson Roberto" uniqKey="Sendyk W" first="Wilson Roberto" last="Sendyk">Wilson Roberto Sendyk</name><name sortKey="Silva, Marcos Rogerio Pupo" sort="Silva, Marcos Rogerio Pupo" uniqKey="Silva M" first="Marcos Rogério Pupo" last="Silva">Marcos Rogério Pupo Silva</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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