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KMID : 0362419970350040627
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Journal of Korean Academy of Prosthodontics
1997 Volume.35 No. 4 p.627 ~ p.646
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THREE DIMENSIONAL FINITE ELEMENT ANALYSIS ON THE MINIMUM CONTACT FRACTION OF BONE-IMPLANT INTERFACE
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Jang Kyung-Soo
Kim Yung-Soo
Kim Chang-Whe
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Abstract
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In order to find the degree of osseointegration at bone-implant interface of clinically successful implants, models including the 3.75mm wide, 10mm long screw type Branemarkimplant as a standard and cylinder, 15mm long, 5.0mm wide, two splinted implants, and implants installed in various cancellous bone density were designed. Also, the amount of load and material of prostheses were changed. The stress and minimum contact fraction were analyzed on each model using three-dimensional finite element method(I-DEAS and ABAQUS version 5.5) The results of this study were as follows. 1. 10mm long, 3.75mm diameter-screw type implant had 36.5~43.7% of minimum contact fraction. 2. Cylinder type implant showed inferior stress distribution and higher minimum contact fraction than screw type. 3. As implant length was increased, minimum contact fraction was increased a little, however, maximum principal stress was decreased. 4. Implants with a large diameter had lower stress value with slightly higher minimum contact fraction than standard screw type. 5. Two splinted implants showed no change of minimum contact fraction. 6. The higher bone density, the lower stress value. 7. The material of occlusal surface had no effect on the stress of the bone-implant interface.
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KEYWORD
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bone-implant interface, three dimensional finite element analysis, minimum contact fraction
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