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Abstract:
The
implant-to-bone contact stress following magnitudes of interference,
which indicated the differences of the diameter between the implant and
the receipting bone cavity at the interface, are calculated with the
contact element method (CEM). The model of cubiform bone and columniform
implant is developed based on clinic. The results indicat that the
stress distribution is asymmetric with axis of implant. Stress
magnitudes correlate strongly to those of interference. The maximum
occurrs in direction of the medial-distal aspect in cortical bone layer
and the minimum the buccal-lingual area on the bottom line in the
cancellous bone. Along the radius, stresses decrease with the distance
from the central point. Cortical bone contribute more to implant
retention than cancellous bone. Coating has little effect on the contact
pressure at the interface.
Key words: Implant-bone
interface Femur Contact element stress Magnitude of
interference Contact stress
CLC No: TQ174
国家自然科学基金(50275126,
50305030)、中国博士后科学基金(2003033526)、四川省重点科技攻关项目(03SG022)和西南交通大学基础科学研究基金(2003B03)资助项目.
Received 30507, received in revised form 20031125
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