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Bone and soft tissue outcomes, risk factors, and complications of implant-supported prostheses: 5-Years RCT with different abutment types and loading protocols
Jönköping University, School of Health and Welfare, HHJ. Centre for Oral Health. Department of Prosthetic Dentistry, Institute for Postgraduate Dental Education, Jönköping, Sweden.
Jönköping University, School of Health and Welfare, HHJ. Centre for Oral Health. Department of Oral & Maxillofacial Radiology, Institute for Postgraduate Dental Education, Jönköping, Sweden.
Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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2018 (English)In: Clinical Implant Dentistry and Related Research, ISSN 1523-0899, E-ISSN 1708-8208, Vol. 20, no 3, p. 313-321Article in journal (Refereed) Published
Abstract [en]

Background: Data on risk factors and complications after long-term implant treatment is limited. The aims were to evaluate the role of various fixation modes and to analyze complications and risks that affect long-term use of implant-supported partial fixed dental prostheses.

Materials and Methods: Fifty partially edentulous subjects received three Brånemark TiUnite™ implants. Superstructures were attached directly at implant level (IL) or via abutments: machined surface (AM) and an oxidized surface (AOX, TiUnite™). Implants were immediately loaded (test) or unloaded for 3 months (control). Examinations occurred over a 5-year period.

Results: Forty-four subjects were re-examined after 5 years. Cumulative survival rates in test and control groups were 93.9% and 97.0%, respectively. Marginal bone loss (MBL; Mean [SEM]) was significantly lower at superstructures connected to AM (1.61 [0.25] mm) than at sites with no abutment IL (2.14 [0.17] mm). Peri-implantitis occurred in 9.1% of subjects and in 4.0% of implants. Multiple linear regression indicated that increased probing pocket depth (PPD), periodontal disease experience, deteriorating health, and light smoking (≤10 cigarettes/day) predict greater MBL, whereas increased buccal soft tissue thickness and higher ISQ predict lower MBL.

Conclusions: The results show that MBL was influenced by the connection type. A machined abutment, instead of connecting the superstructure directly at the implant level, was beneficial. The following factors influenced MBL: PPD, periodontal disease experience, deteriorating health, light smoking, buccal soft tissue thickness, and ISQ. The results on peri-implantitis underscore the need for long-term maintenance care. Further, the abutment material surface properties constitute additional target for strategies to minimize MBL.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018. Vol. 20, no 3, p. 313-321
Keywords [en]
clinical outcomes, complications, dental abutment, dental implant, marginal bone loss, risk factors, soft tissues, surface properties
National Category
Dentistry
Identifiers
URN: urn:nbn:se:hj:diva-42718DOI: 10.1111/cid.12587ISI: 000434958400007PubMedID: 29380510Scopus ID: 2-s2.0-85048642086OAI: oai:DiVA.org:hj-42718DiVA, id: diva2:1281923
Funder
Swedish Research Council, K2015-52X-09495-28-4
Note

Cited By :2; Export Date: 23 January 2019; Article; Correspondence Address: Thomsen, P.; Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy, University of GothenburgSweden; email: peter.thomsen@biomaterials.gu.se; Funding details: ALFGBG-448851; Funding details: Vetenskapsrådet, VR; Funding details: IngaBritt och Arne Lundbergs Forskningsstiftelse; Funding details: Stiftelsen Handlanden Hjalmar Svenssons; Funding text 1: Jo€nko€ping County Council; The Swedish Research Council, Grant/Award Number: K2015-52X-09495-28-4; The BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy; The Region Västra Go€taland; The ALF/LUA Research grant, Grant/Award Number: ALFGBG-448851; The Hjalmar Svensson Foundation; The Vilhelm and Martina Lundgren Vetenskapsfond; The IngaBritt and Arne Lundberg Foundation

Available from: 2019-01-23 Created: 2019-01-23 Last updated: 2019-09-13Bibliographically approved

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