uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Implant-level prostheses in the edentulous maxilla: a comparison with conventional abutment-level prostheses after 5 years of use
The Malar Hospital, Eskilstuna, Sweden.
2011 (English)In: International Journal of Prosthodontics, ISSN 0893-2174, Vol. 24, no 2, 158-167 p.Article in journal (Refereed) Published
Abstract [en]


Long-term comparisons of frameworks at the implant or abutment level are not available, and knowledge of the clinical function of cobalt-chromium (Co-Cr) alloy frameworks is limited. Primarily, the aim of this study was to compare the 5-year clinical performance of frameworks with or without abutment connections to implants. Secondly, the outcomes of prostheses made from Co-Cr alloy with porcelain veneers to those made of commercially pure titanium (CP Ti) with acrylic veneers were compared.


The test groups comprised patients treated with screw-retained fixed prostheses made at the implant level according to the Cresco method in either dental porcelain-veneered Co-Cr alloy (n = 15) or acrylic-veneered CP Ti (n = 25). A control group of 40 randomly selected patients were provided with prostheses made at the standard abutment level in CP Ti with acrylic veneers. For all patients, clinical and radiologic 5-year data were retrospectively collected and evaluated.


Five-year implant cumulative survival rates (CSRs) were 98.6% and 97.6% for test and control groups, respectively (P > .05). No major differences in bone level were demonstrated between the groups after 5 years (P > .05). Significantly more complications occurred in the test groups compared to the control group (P < .01), with the most common complications being mucositis and fracture of veneers.


After 5 years, the clinical outcomes of implant-level prostheses made of porcelain-veneered Co-Cr or acrylic-veneered CP Ti seem comparable to acrylic-veneered titanium prostheses made at the standard abutment level regarding implant CSR and bone levels. However, more complications were registered in implant-level prostheses compared to the standard abutment-level prostheses.

Place, publisher, year, edition, pages
2011. Vol. 24, no 2, 158-167 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-197765PubMedID: 21479285OAI: oai:DiVA.org:uu-197765DiVA: diva2:614053
Available from: 2013-04-03 Created: 2013-04-03 Last updated: 2013-04-03Bibliographically approved

Open Access in DiVA

No full text

In the same journal
International Journal of Prosthodontics
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 166 hits
ReferencesLink to record
Permanent link

Direct link