Immediately Loaded Implants with or without Abutments Supporting Fixed Partial Dentures: 1‐Year Results from a Prospective, Randomized, Clinical Trial. (7th January 2013)

• Record Type: Journal Article
• Authors: Göthberg, Catharina; André, Ulrika; Gröndahl, Kerstin; Ljungquist, Birgit; Thomsen, Peter; Slotte, Christer
• Is Part Of: Clinical implant dentistry and related research. Volume 16:Number 4(2014:Nov.)
• Page Start: 487
• Page End: 500
• Publication Date: 2013-01-07
• Subjects: Dental implants -- Periodicals; Dental Implantation -- Periodicals; Dental Implants -- Periodicals; 617.693
• DOI: 10.1111/cid.12025
• Languages: English
• ISSNs: 1523-0899

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <sec id="cid12025-sec-0001" sec-type="section"> <title>Purpose</title> <p>To evaluate 1‐year implant survival and marginal bone loss around implants that support fixed partial dentures loaded immediately or after 3 months, and effects from abutment usage.</p> </sec> <sec id="cid12025-sec-0002" sec-type="section"> <title>Materials and Methods</title> <p>In this 2005 to 2009 randomized, parallel‐group, clinical trial, 50 partially edentulous patients each received three Brånemark TiUnite™ implants (Nobel Biocare®, Göteborg, Sweden), mostly in the posterior maxilla. Two implants were fitted with abutments: a TiUnite™ surface and a machine‐milled surface; the suprastructure was attached directly at implant level for the third implant. After randomized allocation, implants were immediately loaded with a fixed temporary bridge (test group) or left unloaded for 3 months (control group). A permanent fixed suprastructure replaced the temporary bridge after 6 months (test). Hard and soft tissues were examined during pretreatment and surgery plus 2 days, 14 days, 4 weeks, 3 months, and 1 year after surgery.</p> </sec> <sec id="cid12025-sec-0003" sec-type="section"> <title>Results</title> <p>After 1 year, four implants were lost in the test and two in the control groups (1‐year survival rates of 94.9% [test] and 97.2% [control], with no significant intergroup difference). Resonance frequency analysis values indicated a similar pattern in both groups, with implant stability quotient (ISQ) reduction between 2 and 4 weeks. The test group had a significantly lower ISQ than the control group at these appointments. After 1 year, marginal bone losses around the implants were, on average, 1.32 mm (test, standard error of the mean [SEM] 0.08) and 1.24 mm (control, SEM 0.08), with no significant intergroup difference. Significantly larger marginal bone loss was observed at implants without abutment compared with implants with abutment.</p> </sec> <sec id="cid12025-sec-0004" sec-type="section"> <title>Conclusions</title> <p>For both groups, this study showed similar implant survival rates and marginal bone loss. Larger bone loss was found at implants loaded without attached abutments.</p> </sec> </abstract>