Small‐diameter titanium Grade IV and titanium–zirconium implants in edentulous mandibles: three‐year results from a double‐blind, randomized controlled trial. Issue 7 (9th April 2014)

• Record Type: Journal Article
• Authors: Quirynen, Marc; Al‐Nawas, Bilal; Meijer, Henny J.A.; Razavi, Amir; Reichert, Torsten E.; Schimmel, Martin; Storelli, Stefano; Romeo, Eugenio; the Roxolid Study Group
• Is Part Of: Clinical oral implants research. Volume 26:Issue 7(2015:Jul.)
• Page Start: 831
• Page End: 840
• Publication Date: 2014-04-09
• Subjects: Dental implants -- Research -- Periodicals; 617.69
• DOI: 10.1111/clr.12367
• Languages: English
• ISSNs: 0905-7161

Abstract

<abstract abstract-type="main" id="clr12367-abs-0001"> <title>Abstract</title> <sec id="clr12367-sec-0001" sec-type="section"> <title>Objective</title> <p>The aim of this study was to compare crestal bone‐level changes, soft tissue parameters and implant success and survival between small‐diameter implants made of titanium/zirconium (TiZr) alloy or of Grade IV titanium (Ti) in edentulous mandibles restored with removable overdentures.</p> </sec> <sec id="clr12367-sec-0002" sec-type="section"> <title>Materials and Methods</title> <p>This was a randomized, controlled, double‐blind, split‐mouth multicenter clinical trial. Patients with edentulous mandibles received two Straumann bone‐level implants (diameter 3.3 mm), one of Ti Grade IV (control) and one of TiZr (test), in the interforaminal region. Implants were loaded after 6–8 weeks and removable Locator‐retained overdentures were placed within 2 weeks of loading. Modified plaque and sulcus bleeding indices, radiographic bone level, and implant survival and success were evaluated up to 36 months.</p> </sec> <sec id="clr12367-sec-0003" sec-type="section"> <title>Results</title> <p>Of 91 treated patients, 75 completed the three‐year follow‐up. Three implants were lost (two control and one test implant). The survival rates were 98.7% and 97.3%, and the mean marginal bone level change was −0.78 ± 0.75 and −0.60 ± 0.71 mm for TiZr and Ti Grade IV implants. Most patients had a plaque score of 0 or 1 (54% for test and 51.7% for control), and a sulcus bleeding score of 0 (46.1% for test and 44.9% for control). No significant differences were found between the two implant types for bone‐level change, soft tissue parameters, survival and success.</p> </sec> <sec id="clr12367-sec-0004" sec-type="section"> <title>Conclusions</title> <p>After 36 months, similar outcomes were found between Ti Grade IV and TiZr implants. The results confirm that the results seen at 12 months continue over time.</p> </sec> </abstract>