TITLE

Zirconia dental implants: An alternative to the present or to the future? (Part I)

AUTHOR(S)
HOCHSCHEIDT, Celso João; ALVES, Edson Durval Menezes; BERNARDES, Luiz Antô;nio Bastos; HOCHSCHEIDT, Regina Célia
PUB. DATE
October 2011
SOURCE
Revista Dental Press de Periodontia e Implantologia;oct-dec2011, Vol. 5 Issue 4, p100
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Introduction: Dental implants and abutments are normally manufactured with titanium (Ti) because of the background biocompatibility and mechanical properties of this metal. However, some local problems related to thin gingival phenotypes or high smile line has always been a challenge to implantodontics. In this kind of situation, a risk of gingival mucosa displaying greyish color is also present. Harmful effects of metallic materials to human body have also been reported at both peri-implant and systemic levels, especially by Holistic medicine followers. Objective: In order to find an alternative material to Ti, a broad bibliographic review was made. Methods: Zirconinum dioxide (ZrO2) or zirconia (Zr) ceramics were studied in both in vitro and in vivo studies. Clinical data related to bone-implant contact (BIC) were also presented, evaluating its biocompatibility, resistance and indications. Conclusion: It was concluded that zirconia is a biomaterial with great biocompatibility, with osseointegration and BIC rates comparable to Ti. Zr ceramics with modified surfaces show a more favorable osseointegration. Y-TZP (yttrium tetragonal zirconia polycrystals) dental implants display many advantages when compared to other ceramic materials thanks to the tenacity mechanisms acting in the microstructure. This biomaterial fracture resistance is within the clinical acceptance limits, within normal function of stomatognathic system. Thus, Zr implants have already become an alternative to Ti, being more indicated to anterior segment, on thin gingival phenotypes, with high smile line and for patients allergic to metals or metalosis.
ACCESSION #
83239510

 

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