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KMID : 0361919980280030391
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Korean Journal of Orthodontics
1998 Volume.28 No. 3 p.391 ~ p.398
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A FEM ANALYSIS FOR INITIAL STRESS ON THE UPPER CANINE BY ORTHODONTIC FORCE OF INTRUSION ARCH WIRE ACTIVATION
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Abstract
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The purpose of this study was to find the distribution and measurement of compressive and tensile stress when intrusi- on arch wire is forced engage with upper canine and to analysis stress at each section through FEM. And we compare compressive and tensile ratio at each section. The results were as follows.
1. At FA point and cemento-enamel junction of upper canine, compressive and tensile force ratio is about the same. 2. At apex, compressive force is the four times as tensile force. ; In intrusion, we show root resorption at apex. 3. At Cemento-enamel junction, the compressive and tensile force show the maximun value except FA point.
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