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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, E-ISSN 1139-9791, Vol. 24, no 2, 158-167 p.Article in journal (Refereed) Published
Abstract [en]

PURPOSE:

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.

MATERIALS AND METHODS:

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.

RESULTS:

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.

CONCLUSIONS:

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
Identifiers
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: 2017-12-06Bibliographically approved

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