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Osseointegration of two different phosphate ion‐containing titanium oxide surfaces in rabbit cancellous bone
Author(s) -
Park JinWoo
Publication year - 2013
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2011.02406.x
Subject(s) - osseointegration , titanium , materials science , implant , biomedical engineering , cancellous bone , dentistry , implant stability quotient , phosphate , chemistry , surgery , medicine , metallurgy , organic chemistry
Objective This study assessed the osseointegration of grit‐blasted titanium (Ti) implants with a hydrophilic phosphate ion‐incorporated oxide surface in rabbit cancellous bone, and compared its bone healing with commercially available phosphate‐incorporated clinical implants obtained by micro‐arc oxidation (TiUnite, TU implant). Material and methods The hydrophilic phosphate‐incorporated Ti surface (P implant) was produced by hydrothermal treatment on grit‐blasted moderately rough‐surfaced clinical implant. The TU surface was used as a control. The surface characteristics were evaluated by field emission‐scanning electron microscopy, X‐ray photoelectron spectroscopy, optical profilometry, and inductively coupled plasma‐atomic emission spectroscopy ( ICP ‐ AES ). Thirty‐two threaded implants with lengths of 10 and 3.3 mm diameter (16 P implants and 16 TU implants) were placed in the femoral condyles of 16 New Zealand White rabbits. Histomorphometric analysis, removal torque tests, and surface analysis of the torque‐tested implants were performed 4 weeks after implantation. Results The P and TU implants displayed micro‐rough surface features with similar R a values at the micron‐scale. ICP ‐ AES analysis revealed that both the P and TU implants released phosphate ions into the solution. The torque‐tested P and TU implants exhibited a considerable quantity of bone attached to the surface. The P implants exhibited significantly higher bone‐implant contact percentages, both in terms of the all threads region and the total lateral length of implants compared with the TU implants ( P < 0.01), but no statistical difference was found for the removal torque values. Conclusion These results suggest that the phosphate‐incorporated Ti oxide surface obtained by hydrothermal treatment achieves rapid osseointegration in cancellous bone by increasing the degree of bone‐implant contact.