Characteristics of implant-CAD/CAM abutment connections of two different internal connection systems

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Characteristics of implant-CAD/CAM abutment connections of two different internal connection systems

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dc.contributor.author Sumi, T
dc.contributor.author Braian, Michael
dc.contributor.author Shimada, A
dc.contributor.author Shibata, Naoki
dc.contributor.author Takeshita, Kenji
dc.contributor.author Vandeweghe, Stefan
dc.contributor.author Coelho, Paulo G
dc.contributor.author Wennerberg, Ann
dc.contributor.author Jimbo, Ryo
dc.date.accessioned 2012-12-21T12:45:24Z
dc.date.available 2012-12-21T12:45:24Z
dc.date.issued 2012 en_US
dc.identifier.citation 391-398 en_US
dc.identifier.issn 0305-182X en_US
dc.identifier.uri http://hdl.handle.net/2043/14718
dc.description.abstract Titanium or zirconium computer-aided design/computer-aided manufacturing abutments are now widely used for aesthetic implant treatments; however, information regarding microscopic structural differences that may influence the biological and mechanical outcomes of different implant systems is limited. Therefore, the characteristics of different connection systems were investigated. Optical microscopic observation and scanning electron microscopy showed different characteristics of two internal systems, namely the Astra Tech and the Replace Select system, and for different materials. The scanning electron microscopic observation showed for the Astra Tech that the implant-abutment interface seemed to be completely sealed for both titanium and zirconium abutments, both horizontally and sagittally; however, the first implant-abutment contact was below the fixture top, creating a microgap, and fixtures connected with titanium abutments showed significantly larger values (23·56μm±5·44 in width, and 168·78μm±30·39 in depth, P<0·001). For Replace Select, scanning electron microscopy in the sagittal direction showed that the sealing of titanium and zirconium abutments differed. The seal between the implant-titanium and implant-zirconium abutments seemed to be complete at the butt-joint interface; however, the displacement of the abutment in relation to the fixture in the lateral direction was evident for both abutments with no statistical differences (P>0·70), creating an inverted microgap. Thus, microscopy evaluation of two commonly used internal systems connected to titanium or zirconium abutments showed that the implant-abutment interface was perfectly sealed under no-loading conditions. However, an inverted microgap was seen in both systems, which may result in bacterial accumulation as well as alteration of stress distribution at the implant-abutment interface. en_US
dc.language.iso eng en_US
dc.publisher Wiley en_US
dc.subject.classification Medicine en_US
dc.title Characteristics of implant-CAD/CAM abutment connections of two different internal connection systems en_US
dc.type Article, peer reviewed scientific en_US
dc.contributor.department Malmö University. Faculty of Odontology
dc.identifier.doi 10.1111/j.1365-2842.2011.02273.x en_US
dc.subject.srsc Research Subject Categories::ODONTOLOGY en_US
dc.relation.ispartofpublication Journal of Oral Rehabilitation;5
dc.relation.ispartofpublicationvolume 39 en_US
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