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Objectives: The objective of this systematic review was to compare within the
literature if titanium and titanium-zirconium implants show differences, when
evaluated soft and hard tissue, compared to zirconia implants.
Material and methods: The searches were electronically performed (PubMed
and Web of Science) and by hand, in October 2020, to identify randomized
controlled trials comparing either zirconia implants with titanium or titaniumzirconia implants. The focused question was determined according to PICOT
strategy.
Results: A total of 7 studies were included from a total of 202 articles initially
found, which 4 of them were duplicates and 198 titles were screened and 191 of
them excluded. The follow-up periods ranged from 12 months to 80 months and
the mean age from 43.3 to 65.8. The survival rate for titanium implants ranged
from 92.6% to 100% and for titanium-zirconium implants from 95.8% to 100%,
whereas zirconia implants ranged from 87.5% to 91.25%. The mean marginal
bone loss for titanium implants ranged from -1.17mm to -0.125mm, for titaniumzirconium implants from -0.6mm to -0.32mm, and for zirconia implants from -
0.25mm to -1.38mm. Regarding mucositis and peri-implantitis, the studies
showed little incidence. For bleeding on probing, it was evaluated for zirconia
implants a 16.43%, while for titanium implants ranged between 10% and 20%
and for titanium-zirconium implants 10% to 13.8%. Probing-in-depth for titanium
implants ranged from 1.6mm to 3.05mm, for zirconia implants ranged from
2.21mm to 2.6mm and for titanium-zirconium evaluated probing in depth
recording 3.12mm. Regarding the diameters of implants, all types were used
(narrow, regular, and wide).
Conclusion: All three types of implants showed similar soft and hard tissue
response and behavior, except for the survival rate involving the zirconia
implants, which had the lowest value.
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Palavras-chave
Implants Zirconia Titanium Titanium-zirconium Survival rate Biological complications