Characterization of Wet Powder-Sprayed Zirconia/Calcium Phosphate Coating for Dental Implants

• DOI: 10.1111/cid.12071
• Publication Date: 2013-04-10T00:39:45Z
• Authors: Karoline Pardun; Laura Treccani; Eike Volkmann; Giovanni Li Destri; Giovanni Marletta; Philipp Streckbein; Christian Heiss; Kurosch Rezwan
• Keywords: Calcium Phosphates; Dental Implants; 03 medical and health sciences; Durapatite; 0302 clinical medicine; Coated Materials, Biocompatible; coating adhesion; dental implants; hydroxyapatite; wet powder spraying; zirconia; Surface Properties; Materials Testing; Zirconium; Powders

Purpose Yttria-stabilized zirconia (TZ) is used for dental applications because of its low toxicity and beneficial mechanical properties, but it does not stimulate bone regeneration around the implant due to bioinertness. Therefore, hydroxyapatite (HA) coatings are often utilized increase surface bioactivity achieve a better osseointegration. These coatings, however, chemically nonstable provide weak bonding substrate surface. Materials Methods In this study, substrates were coated with calcium phosphate/zirconia mixture ceramic high potential good stability. The obtained by wet powder spraying (WPS). Pure HA TZ employed as reference materials. characterized regard microstructure, roughness, phase composition. Scratch tests carried out investigate coating adhesion. influence on strength was evaluated ball three balls test (B3B). addition, screws also inserted in biomechanical block bovine rip bone. Results After sintering, mixed exhibited porous morphology roughness about 4 μm total porosity 17%. Phase analysis showed transformation from zirconium oxide tricalcium phosphate. Investigations bond confirmed strong adhesion substrate, while biaxial fracture only slightly affected. Insertion experiments scratch results evidenced an intact screw. Conclusions present study revealed higher stability firm compared pure phosphate coating. We successfully demonstrate particular versatility WPS technique implants complex curved