Small-diameter titanium grade IV and titanium-zirconium implants in edentulous mandibles: five-year results from a double-blind, randomized controlled trialReportar como inadecuado




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BMC Oral Health

, 15:123

First Online: 12 October 2015Received: 17 May 2015Accepted: 05 October 2015

Abstract

BackgroundThe aim of this study was to compare the 5-year survival and success rates of 3.3 mm dental implants either made from titanium-zirconium TiZr alloy or from Grade IV titanium Ti Grade IV in mandibular implant-based removable overdentures.

MethodsThe core study had a follow-up period of 36 months and was designed as a randomized, controlled, double-blind, split-mouth multicenter clinical trial. Patients with edentulous mandibles received two Straumann Bone Level implants diameter 3.3 mm, SLActive®, one of TiZr test and one of Ti Grade IV control, in the interforaminal region. This follow-up study recruited patients from the core study and evaluated the plaque and sulcus bleeding indices, radiographic crestal bone level, as well as implant survival and success 60 months after implant placement.

ResultsOf the 91 patients who initially received implants, 75 completed the 36 month follow-up and 49 were available for the 60 month examination. Two patients were excluded so that a total of 47 patients with an average age of 72 ± 8 years were analysed. The characteristics and 36-month performance of the present study cohort did not differ from the non-included initial participants p > 0.05. In the period since the 36-month follow-up examination, no implant was lost. The cumulative implant survival rate was 98.9 % for the TiZr group and 97.8 % for the Ti Grade IV group. Crestal bone level changes at 60 months were not different in the test and control group TiZr −0.60 ± 0.69 mm and Ti Grade IV −0.61 ± 0.83 mm; p = 0.96. The cumulative implant success rate after 60 months was 95.8 and 92.6 % for TiZr and Ti Grade IV, respectively.

ConclusionsAfter 60 months, the positive outcomes of the 36 month results for TiZr and Ti Grade IV implants were confirmed, with no significant differences with regard to crestal bone level change, clinical parameters and survival or success rates. TiZr implants performed equally well compared to conventional Ti Grade IV 3.3 mm diameter-reduced implants for mandibular removable overdentures.

Trial registrationRegistered on www.clinicaltrials.gov: NCT01878331

KeywordsOverdentures TiZr Ti Grade IV SLActive Split-mouth Roxolid AbbreviationsAEAdverse event

ITTIntent to treat

mPIModified plaque index

mSBIModified sulcus bleeding index

PPPer protocol

SAESerious adverse event

SDStandard deviation

TiZrTitanium-zirconium

Ti Grade IVTitanium grade IV

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Autor: Frauke Müller - Bilal Al-Nawas - Stefano Storelli - Marc Quirynen - Stefan Hicklin - Jose Castro-Laza - Renzo Bassetti - M

Fuente: https://link.springer.com/







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