A Study of Surface Treatments of Zirconia Dental Implant
Date Issued
2012
Date
2012
Author(s)
Li, Wei-Ru
Abstract
This thesis studies the tetragonal zirconia polycrystals (TZP) surface conditions after various surface treatment methods including sandblasting, etching, and the hybrid treatment of sandblasting followed by etching. The synthetic diamond particles were used in sandblasting and the results were compared with those obtained by using particles of alumina and zirconia. The aqueous solutions used in etching were nitric acid, hydrofluoric acid, sulfuric acid, hydrochloric acid and potassium hydroxide. It is found that synthetic diamond sand can effectively increase the surface roughness and the surface area ratio of TZP specimen. The variations of surface roughness parameters have positive correlation with air pressure and particle size when synthetic diamonds are used. The main reason is due to the consistent cutting edge of the particles. The mixed aqueous solution of nitric acid and hydrofluoric acid can generate the tiny granular structure on the specimen surface, and effectively increase the surface area. The rough surface after sandblasting can be maintained after acid etching treatments. The surface area ratio Sdr value increases to 1.80 by the hybrid treatment. The EDX analysis shows that there are just slight surface residues of the TZP surface after sandblasting or after appropriate etching treatments.
Subjects
zirconia dental implant
TZP
sandblasting surface treatment
etching surface treatment
surface roughness
Type
thesis
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