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The relative effect of surface strontium chemistry and super‐hydrophilicity on the early osseointegration of moderately rough titanium surface in the rabbit femur
Author(s) -
Park JinWoo,
Kwon TaeGeon,
Suh JoYoung
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.1600-0501.2012.02444.x
Subject(s) - osseointegration , implant stability quotient , implant , titanium , resonance frequency analysis , chemistry , materials science , dentistry , cancellous bone , surface modification , biomedical engineering , surgery , medicine , organic chemistry
Objective It is unclear whether surface bioactive chemistry or hydrophilicity plays a more dominant role in the osseointegration of micro‐structured titanium implants having the same surface topography at the micrometer and submicrometer scales. To understand their comparative effect on enhancing the early osseointegration of micro‐rough‐surfaced implants, this study compared the bone healing‐promoting effect of surface strontium ( Sr ) chemistry that has been shown in numerous studies to super‐hydrophilicity in the early osseointegration of moderately rough‐surfaced clinical oral implants ( SLA ® implant) in rabbit cancellous bone. Material and methods Hydrothermal treatment was performed to incorporate Sr ions into the surface of clinical SLA implants ( SLA / Sr implant). The surface characteristics were evaluated by using field emission‐scanning electron microscopy, X ‐ray photoelectron spectroscopy and optical profilometry. Twenty screw implants (10 control and 10 experimental) were placed in the femoral condyles of 10 N ew Z ealand W hite rabbits. The early osseointegration of the SLA / Sr implant was compared with a chemically modified super‐hydrophilic SLA implant ( SLA ctive ® implant) by histomorphometric and resonance frequency analysis after 2 weeks of implantation. Results The SLA / Sr and SLA ctive implants exhibited an identical surface topography and average R a values at the micron and submicron scales. The SLA / Sr implant displayed a high amount of surface Sr content (15.6 at.%). There was no significant difference in the implant stability quotient ( ISQ ) values between the two groups. However, histomorphometric analysis revealed a significantly higher bone‐to‐implant contact percentage in the SLA / Sr implants compared with the SLA ctive implants in rabbit cancellous bone ( P < 0.01). Conclusion The results indicate that the surface Sr chemistry surpasses the effect of super‐hydrophilicity in promoting the early bone apposition of moderately rough Ti surface in cancellous bone.