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KMID : 0363019970270010263
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Journal of Korean Academy of Periodontology
1997 Volume.27 No. 1 p.263 ~ p.290
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Improved stress analyses of dental systems implant by homogenization technique
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1고철수/1Chul Su Koh
1이만섭/2최귀원/1Man Sup Lee/2Kui Won Choi
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Abstract
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Homogenization technique is employed to investigate the series of stress analyses of
mandible for three different types of dental implants. This technique helps to make
proper material model of bone and analyze such a non homogeneous structure at the
level of individual microstructural unit. The stress analyses with homogenization
technique show much higher stress level in the sponge bone, compared to those of
conventional FEM. It also manifested that even a minor lateral force results in crucial
stresses in the dental implant system and that the macroscale model should take the
shape and size after real mandible to produce reasonable solution in the analyses of
dental implant systems. The shapes of dental implants simulated in this study are
rectangular-cross-sectioned type, hemi-sphere rooted type, and wedge type implant. The
stress states of mandible with hemisphere rooted type implant and wedge type implant
show similar levels, while those with sectioned rectangular implant results in higher
stresses. It is suggested that the distance between the implant tip and cortical bone be
kept far enough to prevent stress concentrations in the mandible.
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KEYWORD
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