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Mechanical anchorage and peri‐implant bone formation of surface‐modified zirconia in minipigs
Author(s) -
Schliephake Henning,
Hefti Thomas,
Schlottig Falko,
Gédet Philippe,
Staedt Henning
Publication year - 2010
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.2010.01549.x
Subject(s) - cubic zirconia , titanium , implant , dentistry , zirconium , osseointegration , materials science , molar , medicine , composite material , surgery , metallurgy , ceramic
Schliephake H, Hefti T, Schlottig F, Gédet P, Staedt H. Mechanical anchorage and peri‐implant bone formation of surface‐modified zirconia in minipigs. J Clin Periodontol 2010; 37: 818–828. doi: 10.1111/j.1600‐051X.2010.01549 . Abstract Aim: To test the hypothesis that peri‐implant bone formation and mechanical stability of surface‐modified zirconia and titanium implants are equivalent. Materials and Methods: Twelve minipigs received three types of implants on either side of the mandible 8 weeks after removal of all pre‐molar teeth: (i) a zirconia implant with a sandblasted surface; (ii) a zirconia implants with a sandblasted and etched surface; and (iii) a titanium implant with a sandblasted and acid‐etched surface that served as a control. Removal torque and peri‐implant bone regeneration were evaluated in six animals each after 4 and 13 weeks. Results: The titanium surface was significantly rougher than both tested zirconia surfaces. Mean bone to implant contact (BIC) did not differ significantly between the three implant types after 4 weeks but was significantly higher for titanium compared with both zirconia implants after 13 weeks ( p <0.05). Bone volume density (BVD) did not differ significantly at any interval. Removal torque was significantly higher for titanium compared with both zirconia surfaces after 4 and 13 weeks ( p <0.001). The sandblasted and etched zirconia surface showed a significantly higher removal torque after 4 weeks compared with sandblasted zirconia ( p <0.05); this difference levelled out after 13 weeks. Conclusions: It is concluded that all implants achieved osseointegration with similar degrees of BIC and BVD; however, titanium implants showed a higher resistance to removal torque, probably due to higher surface roughness.