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pubmed-article:10445478pubmed:dateCreated1999-9-28lld:pubmed
pubmed-article:10445478pubmed:abstractTextThe in vitro marginal fit of five different all-ceramic crown systems (In-Ceram, Empress staining technique, Empress veneering technique, Celay feldspathic system, Celay In-Ceram system) was evaluated before and after cyclic preloading in an artificial mouth. The crowns were adhesively luted to extracted natural maxillary incisors prepared with a 90 degrees shoulder. The results were compared to those for porcelain-fused-to-metal (PFM) crowns with circular porcelain-butt margins which were cemented with zinc phosphate cement. The analysis of the marginal discrepancies showed significant (P < 0.001) differences among the groups. Crown cementation increased the marginal gaps significantly (P < 0.01). Empress staining technique crowns showed the smallest marginal gaps (median 47 microm), followed by conventional In-Ceram crowns (median 60 microm) and Empress veneer technique crowns (median 62 microm). Celay In-Ceram crowns displayed marginal openings with a median of 78 microm, followed by Celay feldspathic crowns with a median of 99 microm. The marginal gap of the PFM control crowns showed a median of 64 microm. Ageing in the chewing simulator had no significant influence on the marginal fit of all specimens. The study indicates that all the tested all-ceramic crowns have clinically acceptable margins. However, in vivo investigations of all all-ceramic crown systems should be made before clinical routine.lld:pubmed
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pubmed-article:10445478pubmed:authorpubmed-author:StrubJ RJRlld:pubmed
pubmed-article:10445478pubmed:authorpubmed-author:BeschnidtS...lld:pubmed
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pubmed-article:10445478pubmed:pagination582-93lld:pubmed
pubmed-article:10445478pubmed:dateRevised2009-11-19lld:pubmed
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pubmed-article:10445478pubmed:articleTitleEvaluation of the marginal accuracy of different all-ceramic crown systems after simulation in the artificial mouth.lld:pubmed
pubmed-article:10445478pubmed:affiliationDepartment of Prosthodontics, University of Freiburg, Germany. beschnid@zmk2.ukl.uni.freiburg.delld:pubmed
pubmed-article:10445478pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10445478pubmed:publicationTypeComparative Studylld:pubmed
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