Enhanced osteoconductivity of micro-structured titanium implants (XiVE S CELLplus) by addition of surface calcium chemistry: a histomorphometric study in the rabbit femur.
OBJECTIVE
This study evaluated the osseointegration in rabbit cancellous bone of titanium (Ti) implants with a micro-topographically complex surface structure produced by grit-blasting/acid-etching with or without the addition of surface calcium ion (Ca) chemistry.


METHODS
Micro-structured Ti implants (XiVE S CELLplus screw implant, Dentsply Friadent GmbH) were hydrothermally treated in an alkaline Ca-containing solution to produce a nano-structured Ca-incorporated oxide surface layer. The surface characteristics were evaluated by scanning electron microscopy and stylus profilometry before and after Ca surface treatment. Twenty implants (10 control and 10 experimental) were placed in the femoral condyles of 10 New Zealand White rabbits. Histomorphometric analysis was performed 6 weeks after implantation.


RESULTS
Ca-incorporated and untreated control implants showed similar surface morphologies and surface roughness values at the micron scale. Untreated micro-structured Ti implants achieved a high degree of bone-to-implant contact (BIC), and Ca incorporation further increased BIC% (P<0.05). Active new bone apposition was found on surfaces of Ca-incorporated implants in areas of loose trabeculae.


CONCLUSIONS
The nano-structured Ca-incorporated oxide surface significantly enhanced osteoconductivity of micro-structured Ti implants in rabbit cancellous bone. Results indicate that this surface produced by simple hydrothermal treatment may be effective in improving the osseointegration of implants with micro-topographically complex surface structures in areas of loose cancellous bone.
Park
Jin-Woo
JW
Department of Periodontology, School of Dentistry, Kyungpook National University, Daegu, South Korea. jinwoo@knu.ac.kr
Kim
Hye-Kyoung
HK
Kim
Youn-Jeong
YJ
An
Chang-Hyeon
CH
Hanawa
Takao
T
D000134:Acid Etching, Dental / Q000379:methods; D000818:Animals; D001861:Bone Regeneration / Q000502:physiology*; D002118:Calcium / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D045662:Dental Etching / Q000379:methods; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry*; D017267:Dental Prosthesis Design; D005269:Femur / Q000473:pathology* / Q000648:ultrastructure; D007091:Image Processing, Computer-Assisted; D008297:Male; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry; D016348:Osseointegration / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D010087:Oxides / Q000737:chemistry; D011817:Rabbits; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D017610:Calcium Compounds; D020099:Coated Materials, Biocompatible; D015921:Dental Implants; D003764:Dental Materials; D010087:Oxides; C059910:perovskite; D014025:Titanium; D002118:Calcium