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Payer, M; Heschl, A; Koller, M; Arnetzl, G; Lorenzoni, M; Jakse, N.
All-ceramic restoration of zirconia two-piece implants - a randomized controlled clinical trial.
CLIN ORAL IMPLANT RES. 2015; 26(4): 371-376.
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Autor/innen der Med Uni Graz:
Arnetzl Gerwin
Heschl Alexander
Jakse Norbert
Koller Martin
Lorenzoni Martin
Payer Michael
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Abstract:
Aim of this controlled prospective randomized study was to evaluate the outcome of two-piece zirconia implants compared to titanium implants over a period of up to 24 months. A total of 31 implants (16 zirconia/Ziterion vario Z(®) + 15 titanium/Ziterion vario T(®) ) were inserted primary stable (>30 Ncm) in the maxilla (7) and mandible (24) of 22 patients (13 male, nine female) requiring neither bone nor soft tissue augmentation. After a healing period of 6 months in the maxilla and 4 months in the mandible, ceramic abutments were luted adhesively to the zirconia implants and definitive all-ceramic restoration was performed with high-density ceramics. Radiographic bone levels, condition of the peri-implant mucosa, aesthetic outcome, implant survival and success were recorded for up to 24 months. Measurements of mean marginal bone levels 24 months after surgery showed a significant bone loss (P < 0.001) in both groups (Ti: 1.43 (SD ± 0.67) vs. Zir 1.48 (SD ± 1.05). One zirconia implant was lost 8 months after restoration. No further complications were recorded, giving an overall survival and success rate of 93.3% for zirconia and 100% for titanium implants after a period of up to 24 months. After 24 months, success rates of the two-piece ceramic implants showed no significant difference compared to control two-piece titanium implants. The bonded zirconia implant abutment connection appears to be capable with clinical application over the observed period. However, further control measurements need to confirm the presented data. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

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