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Bone-implant contact at calcium phosphate-coated and porous titanium oxide (TiUnite (TM))-modified oral implants

Cited 63 time in Web of Science Cited 65 time in Scopus
Issue Date
2005
Publisher
Wiley-Blackwell
Citation
Clin. Oral Impl. Res. 16: 532–539
Keywords
bone healingcalcium phosphatedogsimplant surfacesosseointegrationtitaniumtitanium oxide
Abstract
Background: Calcium phosphate (CP)-coated implants are usually referred to as having
osteoconductive properties, whereas titanium implants with a native oxide layer are
considered less osteoconductive. Often smooth titanium oxides (TOs) are compared to
relatively rough CP structures. The objective of this study was to evaluate osteoconduction
by comparing bone–implant contact at a relatively smooth, highly crystalline CP coating
with a structured, porous TO (TiUnitet)-modified surface.
Material and methods: Ten adult Hound Labrador mongrel dogs were used. Four titanium
implants (Nobel Biocare) with CP-coated (2) or TO-modified (2) surfaces were installed 12
weeks following mandibular premolar and molar teeth extraction. The implants were
alternated within and between jaw quadrants in consecutive animals. Mucosal flaps were
advanced and sutured leaving the implants in a submerged position. The animals were
injected with fluorescent bone labels at 3 and 4 weeks postsurgery, and pre-euthanasia to
monitor progress of bone formation. The animals were euthanized at 8 weeks postsurgery
and block biopsies were prepared for histologic and histometric analysis.
Results: There were no remarkable differences in bone formation and apparent bone–
implant contact comparing the TO-modified and CP-coated surfaces. However, the
measured average bone–implant contact was 71% and 57% (P¼0.027) for TO-modified
and CP-coated implants, respectively.
Conclusions: We conclude that the TO surface exhibits osteoconductive properties
exceeding that of the CP surface. One or several of the chemical and physical properties of
the TO surface may result in the remarkable bone formation along its surface. This study indicated that crystallinity and/or chemistry may be important.
ISSN
0905-7161
Language
English
URI
https://hdl.handle.net/10371/68683
DOI
https://doi.org/10.1111/j.1600-0501.2005.01126.x
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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