PMID: 8603207Sep 1, 1995Paper

Marginal discrepancy of all-ceramic crowns cemented on implant abutments

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
J K SutherlandS Syed

Abstract

The purpose of this investigation was to determine the mean marginal discrepancy of all-ceramic crowns cemented on implant abutments. Five Brånemark CeraOne abutments were connected to implant fixtures embedded in acrylic resin blocks. The marginal discrepancy was measured using a video camera connected to a digitizing board at four locations on each abutment for five samples in each of the following groups: all-ceramic caps (caps), all-ceramic crowns (crowns), and all-ceramic crowns cemented with zinc phosphate cement (cemented crowns). The mean marginal discrepancies were as follows: caps, 99.0 micrometers (SD, 16); crowns, 117.8 micrometers (SD, 20); and cemented crowns, 168.8 micrometers (SD, 23). Statistically significant differences were found between all three groups at the 99% level of confidence. In addition there were two significant differences between abutments. Subgingival marginal discrepancies of the magnitude measured in this study have been shown to cause periodontal problems. It is probable that the marginal discrepancy of CeraOne restorations, as tested, can be improved. Efforts should be made to enhance the marginal accuracy of these restorations.

References

Mar 1, 1978·The Journal of the American Dental Association·W B EamesK S Cohen
Dec 1, 1992·The Journal of Prosthetic Dentistry·D L DixonK R Lilly
Sep 1, 1989·The Journal of Prosthetic Dentistry·J A Sorensen
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Citations

Mar 29, 2014·The Journal of Prosthetic Dentistry·Konstantinos X MichalakisYukio Kudara
Feb 5, 2008·Clinical Implant Dentistry and Related Research·Wael AttJörg Rudolf Strub
May 1, 1996·The Journal of Prosthetic Dentistry·J K SutherlandT J Jarotskic
Sep 23, 1998·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·J K SutherlandS R Budd
Oct 1, 2019·International Journal of Dentistry·José RosasVanessa Z Ccahuana-Vasquez

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