J Korean Acad Prosthodont.  2013 Jul;51(3):190-198. 10.4047/jkap.2013.51.3.190.

Osseointegration of zirconia implant in the tibia of pigs

Affiliations
  • 1Department of Prosthodontics, School of Dentistry, Dankook University, Cheonan, Korea. cho8511@dankook.ac.kr

Abstract

PURPOSE
The purposes of this study were to investigate osseointegration around zirconia implants which had machined or alumina sandblasted surface, and to compare the results with titanium implants.
MATERIALS AND METHODS
The study was performed on the tibia of 6 pigs. Three types of implants were investigated: group T-titanium implant, group Z-machined zirconia implant, group ZS-alumina sandblasting treated zirconia implant. Zirconia implants were manufactured from yttria-stabilized tetragonal zirconia polycrystalline (Acucera Inc., Pocheon, Korea). A total of 36 implants were installed in pigs' tibias. After 1, 4 and 12 weeks of healing period, the periotest and the histomorphometric analysis were performed. The data were analyzed using one-way ANOVA and significance was assessed by the Scheffe test (alpha=.05).
RESULTS
In the measurement of surface roughness, highest Ra value was measured in group T with significant difference. No significant differences were found among groups regarding Periotest values. After 1 week, in comparison of bone to implant contact (BIC), group Z showed higher value with significant difference. In comparison of bone area (BA), group T and group Z showed higher value with significant difference than group ZS. After 4 weeks, in comparison of BIC, group T showed higher value with significant difference. Comparison of BA showed no significant difference among each implant. After 12 weeks, the highest mean BIC values were found in group T with significant difference. Group ZS showed higher BIC value with significant difference than group Z. In comparison of BA, group T and group ZS showed higher value with significant difference than group Z.
CONCLUSION
Zirconia implant showed low levels of osseointegration in this experiment. Modification of surface structure should be taken into consideration in designing zirconia implants to improve the success rate.

Keyword

Zirconia implant; Bone to implant contact; Bone area; Histomorphometry

MeSH Terms

Aluminum Oxide
Nitrogen Mustard Compounds
Osseointegration
Swine
Tibia
Titanium
Zirconium
Aluminum Oxide
Nitrogen Mustard Compounds
Titanium
Zirconium
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